Sandeep  Kumar Author of Evaluating Organization Development
FEATURED AUTHOR

Sandeep Kumar

Professor
Raman Research Institute

The research in my group is concerned with the design and synthesis of various liquid crystalline materials. I am interested in understanding the structure-property relationship in these intriguing self-assembling supramolecular architectures. Our present objectives are: (a) design and synthesis of novel liquid crystalline materials; (b) development of new synthetic routes to the synthesis of LCs; (c) search for new reagents for the synthesis of LCs; (d) incorporation of nanoparticles in the sup

Biography

Dr.  Sandeep Kumar
Professor
Raman Research Institute Phone: (91)-80-23610122 (Off.)
C.V. Raman Avenue, Phone: 9448309554 (mobile)
Sadashivanagar Fax: (91)-80-23610492
Bangalore - 560 080 e-mail: [email protected]
INDIA

Date of Birth: December 1, 1959


International Recognition:
• E.T.S. Walton Visiting Professor Award of Science Foundation of Ireland
• The inaugural LG Philips Display Mid-Career Award presented by the  International Liquid Crystal Society for the work on 'the synthesis of discotic liquid crystals, including the first  room temperature system, design of nematic discotic materials, innovative chemistry and the inclusion of nano-materials in discotic systems'.
• The Royal Society of Chemistry Journals Grant for International Authors for significant publications in RSC journals.
• The Royal Society of Chemistry invitation for a celebratory ‘most cited’ dinner at the ACS National Meeting in Washington.  This awards dinner hosted the most cited authors from  two flagship journals, ChemComm and ChemSocRev, for the years 2006 and 2007.
• Member, Scientific Committee of the 24th International Liquid Crystal Conference, Mainz, Germany.
• Member, Scientific Committee of the 23rd International Liquid Crystal Conference, Krakow, Poland.
• Editorial Board Member of the journal “Liquid Crystals” (Taylor & Francis).
• Editorial Board Member of the ‘Journal of Chemistry’.
• Associate Editor, “Journal of Information Display” (Taylor & Francis).
• Guest Editor, Israel Journal of Chemistry, special issue on Liquid Crystals.
• Invited Speaker in several International conferences.
• Reviewer for several International journals, like, ACS Nano, JACS, ACS Applied Materials, Nano Lett., Org. Lett., Adv. Mater., Chem. Commun., Tet. Lett., Chem. Mater., J. Phys. Chem., J. Mater. Chem., Euro Phys. Lett., J. Phys. Org. Chem., J. Appl. Poly. Sci., J. Porphyrins Phthalocyanines, Syn. Metal, Phase. Trans., Liq. Cryst., Mol. Cryst. Liq. Cryst., Syn. Lett., Beilstein J.O.C., Bulletin of Materials Science, J. Mol. Liq., J. Renewable Sustainable Energy, etc.



Positions Held:

2012-2013 E.T.S. Walton Visiting Professor, Trinity College, Dublin
2009-2012 Professor & Coordinator, Soft Condensed Matter Group, RRI, Bangalore, India.
2008-2009 Visiting Research Professor, National Dong Hwa University, Hualien, Taiwan.
2007- Professor, RRI, Bangalore, India.
2002-2007 Associate Professor II, RRI, Bangalore, India.
1995-2002 Scientist, Centre for Liquid Crystal Research, Bangalore, India.
1999-2000 Visiting Research Professor, NRL, Washington DC, USA
1994 - 1995 Postdoctoral research with Professor H. Ringsdorf at the University of Mainz, Germany.
1992 - 1994 Postdoctoral research with Professor E. Keinan at The Scripps Research Institute, La Jolla, California, U.S.A.
1989 - 1992 Postdoctoral research with Professor E. Keinan at Technion-Israel Institute of Technology, Haifa, Israel.
1988 -1989 Postdoctoral research with Professor E. Glotter at the Hebrew University of Jerusalem, Rehovot, Israel.
1986 - 1988 Research Chemist with Dr. Sukh Dev at Malti-Chem Research Centre, Nandesari, Vadodara, India.
1981 - 1985 Doctoral research with Professor A.B. Ray at B.H.U., Varanasi, India.



A report on research and other academic activities

Philosophy and Mission:
Life on Earth begins with the self-organization of molecules. No life would be possible without the self-assembly of lipids into bilayers within the cell membrane. Numerous biological supramolecular structures, e.g., the spontaneous formation of the double helix of nucleic acids, collagen, microtubules, ribosomes, multisubunit enzymes, etc., result from self-assembly of organic molecules. In materials science, non-covalent interactions have been used to obtain well-defined self-assembled architectures in neat systems as well as in solvents. Liquid crystals (LCs) belong to one of such systems. Supramolecular interactions such as van der Waals forces, dipolar or quadrupolar interactions, charge-transfer interactions and hydrogen bonding play a crucial role in the formation of LCs and in the determination of their mesomorphic properties. Liquid crystalline state - the fascinating, intriguing, beautiful, mysterious, delicate fourth state of matter, is an intermediate state between the solid and the liquid. Liquid crystals are unique nanostructures with remarkable electronic and optoelectronic properties.
The research in my group is concerned with the design and synthesis of various liquid crystalline materials. I am interested in understanding the structure-property relationship in these intriguing self-assembling supramolecular architectures. Our present objectives are: (a) design and synthesis of novel liquid crystalline materials; (b) development of new synthetic routes to the synthesis of LCs; (c) search for new reagents for the synthesis of LCs; (d) incorporation of nanoparticles in the supramolecular order of LCs to hybridize their properties; (e) green chemistry approach to the synthesis of soft condensed matters and (f) utilization of synthesized LCs to fabricate various devises such as, photovoltaic solar cells, light emitting diodes, etc.

Brief outline of my research career:
I started my research career in 1981 as a Ph.D. student with Professor A.B. Ray at the Banaras Hindu University, Varanasi. After completing my Ph.D. in 1986, I worked with Dr. Sukh Dev at Malti Chem Research Centre, Vadodara for about two and half years and then moved to the Hebrew University of Jerusalem, Israel for a post-doctoral research with Professor E. Glotter followed by the post-doctoral work with Professor E. Keinan at Technion, Israel Institute of Technology, Israel. I was a post-doctoral fellow at the Scripps Research Institute, La Jolla, USA during 1992-1994 with Professor Keinan followed by at the University of Mainz, Germany with Professor H. Ringsdorf during 1994-1995. I joined the Centre for Liquid Crystal Research, Bangalore as a Scientist to start a new Chemistry lab in September 1995. In December 2002 I joined the Raman Research Institute (RRI) as a Senior Associate Professor and become Full Professor in 2007. I also served as the Coordinator, Soft Condensed Matter Group of RRI during 2009-2012. I was a visiting Research Professor at the Navel Research Laboratory, Washington DC during 1999-2000 and at the National Dong Hwa University, Taiwan during 2008-2009. Currently (2012-2013) I am visiting Trinity College, Dublin, Ireland as an E.T.S. Walton Visiting Professor. I have also visited many other countries like, U.K., France, Japan, Slovenia, Italy, Korea, Malaysia, China and Poland to deliver lectures and to attend conferences.  

A summary of Research Publications and citations:
I have published over 150 research papers. Most of my papers have been published in highly reputed international journals like Nature, Angewandte Chemie Int. Ed., Journal of American Chemical Society, Journal of Organic Chemistry, Chemistry of Materials, Journal of Chemical Society, Chemical Communications, Advanced Materials, Phys. Rev. Lett., Journal of Materials Chemistry, Soft Matter, Langmuir, J. Phys. Chem.B, Tetrahedron Letters, Tetrahedron, Synthesis, Liquid Crystals and Molecular Crystals and Liquid Crystals (Appendix I - III). Professor Percec, the editor of the book series "Liquid Crystals" published by CRC Press has invited me to write a book on “Chemistry of Discotic Liquid Crystals”. This is the first dedicated book on this topic. The LC Book series has excellent reputation in the field of soft condensed matter and was under the editorship of the eminent Professors George Gray and John Goodby.  I have also been invited to write two chapters for highly reputed books in the field of liquid crystals. The editors of several journals like, Chemical Society Reviews, Israel J. Chem., Liquid Crystals and Phase Transitions have invited me to write review articles for their journals. My research papers have been cited about 3000 times (the citations of some paper are given in Appendix II) and several publications have been amongst the most cited and accessed papers. The Royal Society of Chemistry invited me for a celebratory ‘most cited’ dinner at the ACS National Meeting in Washington.  This awards dinner hosted the most cited authors from two flagship journals, Chem Comm and Chem Soc Rev, for the years 2006 and 2007. Six patents have been granted to me. The Royal Society of Chemistry, London awarded me the journals grant for international authors in 2001. In addition to citations in research papers, my work has also been referred to in books. For instance, the importance of new reagents developed by me for the synthesis of symmetrical, unsymmetrical and functionalised triphenylenes has been discussed by G. Lessene in the book “Modern Arene Chemistry, Didier Astrue (Ed.), Wiley-VCH, Weinheim, 2002, page 501. Several researchers all over the world are using these reagents for the improved synthesis of triphenylene derivatives. The International Liquid Crystal Society has presented me the inaugural LG Philips Display Mid-Career Award at the International Liquid Crystal Conference held at Jeju, Korea on July 2, 2008. The Science Foundation of Ireland awarded me the prestigious E.T.S. Walton Visitor award in 2012.

Reviewing of manuscripts, research proposals and Ph.D thesis :
I am a Reviewer for several international journals like, JACS, ACS Applied Materials, Nano Lett., Org. Lett., Adv. Mater., Chem. Commun., Tet. Lett., Chem. Mater., J. Phys. Chem., J. Mater. Chem., Euro Phys. Lett., J. Phys. Org. Chem., J. Appl. Poly. Sci., J. Porphyrins Phthalocyanines, Syn. Metal, Phase. Trans., Liq. Cryst., Mol. Cryst. Liq. Cryst., Syn. Lett., Beilstein J.O.C., Bulletin of Materials Science, J. Mol. Liq., J. Renewable Sustainable Energy, etc. I have reviewed a number of research proposals submitted to various funding agencies. The Department of Information Technology, Government of India, has appointed me a member of several research committees. I have also chaired a DIT committee. I have examined 18 Ph.D. theses of different Indian universities and conducted their viva-voce examination.


Overseas Experience
S. No. From To country
visited Purpose of visit
1 8.5.1988 8.9.1992 Israel Post-doctoral fellow
2 9.9.1992 30.8.1994 U.S.A. Post-doctoral fellow
3 1.9.1994 27.7.1995 Germany Post-doctoral fellow
4 3.7.1995 10.7.1995 France Collaborative work
5 16.1.1999 24.1.1999 Japan Lecture, Mass spectroscopy training
6 3.11.1999 9.11.1999 U.K. Collaborative work
7 10.11.1999 8.3.2000 U.S.A. Visiting Research Professor
8 1.10.2000 1.1.2001 U.S.A. Visiting Research Professor
9 27.7.2002 8.8.2002 U.K. The Royal Society of Chemistry journals grant for International Authors, Conference
10 22.11.2002 30.11.2002 Italy Talk in ILCS Conference
11 3.7.2004 9.7.2004 Slovenia Talk in ILCS Conference
12 1.6.2006 30.6.2006 Ireland Collaborative work
13 2.7.2006 8.7.2006 USA Talk in ILCS Conference
14 23.2.2008 31.12.2008 Taiwan Visiting Research Professor
15 7.6.2008 10.6.2008
Malaysia Lecture
16 26.6.2008 6.7.2008 Korea Talks in Conferences at Jeonju and Jeju and to receive the ILCS LG Philips Mid-career Award
17 29.6.09 10.7.09 China Lectures at I-CAMP, Shanghai and at Jiaotong University, Beijing
18 6.7.10 17.7.10 Poland Invited talks at the Military University of Technology, Warsaw and at the  ILCS 2010 at Krakow
19 15.9.11 25.9.11 Poland Invited talks at the 19th Conference on Liquid Crystals, Miedyzdroje, Poland
20 21.2.2012 22.2.2012 Japan Invited talk at the symposium on liquid crystalline organic semiconductors at Tokyo Institute of Technology
21 16.5.2012 30.4.2013 Ireland E.T.S. Walton Visiting Professor
22 19.8.2012 28.8.2012 Germany Invited talks at the International Liquid crystal conference at mainz and at the University of Siegen.




Appendix I

Publications in descending order of Journal’s impact factor
(please see Appendix III for details)


S.N. Journal Reference
vol, page (year) IF
1 Nature 382, 339 (1996). 36.28
2
3
4 Chem. Soc. Rev 35, 83 (2006).
39, 264 (2010).
40, 306 (2011). 28.767
5 Advanced Materials 30, 251 (1991). 13.877
6
7 Angew. Chem. Int. Ed. 39/17, 3140 (2000).
46, 1501 (2007). 13.455
8
9 J. Am. Chem. Soc. 118, 13051 (1996).
116, 11151 (1994). 9.907
10 Phys. Rev. Lett. 98, 219801 (2007). 7.37
11 Chem. Mater., 8, 1402 (1996). 7.286
12
13
14
15
16
17
18 Chem. Commun. 1059 (1995).
1031 (1996).
1615 (1997).
1427 (1998).
1600 (2004).
7003 (2009)
12182 (2011) 6.169
19
20
21
22
23 J. Mater. Chem. 9, 2751 (1999).
10, 2483 (2000).
11, 2790 (2001).
12, 1335 (2002).
18, 3032 (2008). 5.97
24 Org. Lett. 4, 157 (2002). 5.862
25 J. Org. Chem., 58, 3821-27 (1993). 4.450
26 Soft Matter, 2, 896 (2007). 4.39
27
28 Langmuir 18, 7082 (2002).
23, 3445 (2007). 4.186
29 Electro. Chem. Acta.   52, 2987 (2007). 3.832
30
31
32
33 J. Phys. Chem.B 102, 4697 (1998).
105, 1299 (2001).
111, 11157 (2007)
112, 4865 (2008). 3.696
34 Perkin Trans., 1 (Organic & Biuomolecular) 739 (1991). 3.696
35
36 Phytochemistry 30, 2435-38 (1991).
27,  636 -38 (1988). 3.351
37
38 J. Chem. Phys. 126, 164901 (2007)
133, 044701 (2010) 3.333
39 J. Colloid & Interf. Sci. 296, 195 (2006). 3.070
40
41 Tetrahedron 41, 209  (1985).
63, 6874 (2007). 3.025
42
43
44
45
46
47
48
49
50 Tetrahedron Letters 46, 2603 (2005).
46, 2607 (2005).
46, 4127 (2005).
47, 8993 (2006).
48, 4399 (2007).
49, 3628 (2008).
49, 5419 (2008).
51, 5469 (2010)
52, 5363 (2011) 2.683
51
52 New J. Chem. 32, 19754 (2008).
33, 112 (2009). 2.605
53 Planta Medica 466 (1985). 2.369
54
55 Synthesis, 1119 (1998).
305 (2001). 2.369
56 Chem. Phys. Lett., 306, 163 (1999) 2.337
57
58
59
60
61
62 Phys. Rev. E 59, 5572 (1999).
74, 021703 (2006)
77, 051707 (2008)
78, 032601 (2008)
78, 041703 (2008)
82, 061703 (2010) 2.255
63 Colloids and Surfaces A, 410, 91 (2012) 2.236
64 Mater. Chem. Phys. 133, 635 (2012) 2.234
65 Euro Phys. Lett., 85, 36002 (2009) 2.171
66 J. Appl. Phys. 106 , 093701, (2009) 2.168
67 Thin Solid Films, 358, 241 (2000). 1.890
68--- Liquid Crystals >30 papers 1.858




Appendix II
Citations:
Total Citation:  ~3000  
29 papers have been cited more than 29 times  

Citation of some papers   (from WoS/SciFi)
S.N. Paper Citation
1 Chem. Soc. Rev. 35, 83 (2006). 212
2 Liq. Cryst., 31, 1037 (2004) 158
3 Liq. Cryst., 32, 1089 (2005). 108
4 J. Phys. Chem.B, 102, 4697 (1998). 101
5 Tetrahedron, 41, 209 -14 (1985). 82
6 J. Chem. Soc, Chem. Commun., 1615 (1997). 76
7 Angew. Chem. Int. Ed. Eng., 39/17, 3140 (2000). 66
8 Chem. Mater.,  8, 1402 (1996). 65
9 Synthesis,  1119 (1998). 64
10 J. Mater. Chem., 9, 2751 (1999). 58
11 J. Am. Chem. Soc., 118, 13051 (1996). 54
12 J. Coll. Interface Sci., 296, 195 (2006) 44
15 Org. Lett., 4, 157 (2002) 44
13 J. Phys. Chem. B, 105, 1299 (2001). 43
14 J. Mater. Chem., 11, 2790 (2001). 40
16 Angew. Chem. Int. Ed. Eng., 46, 1501 (2007). 39
17 Mol. Cryst. Liq. Cryst., 288, 211 (1996). 38
18 J. Am. Chem. Soc., 116, 11151 (1994). 38
19 J. Org. Chem., 58, 3821 (1993) 38
20 Mol. Cryst. Liq. Cryst., 396, 121 (2003). 37
21 Chem. Soc. Rev. 39, 264 (2010). 35
22 J. Chem. Soc, Chem. Commun., 1059 (1995). 33
23 Science Spectra, (8) 66 (1997) 33
24 Tet. Lett., 47, 8993 (2006) 32
25 Tet. Lett., 46, 4127 (2005) 31
26 Phytochemistry, 27,  636 -38 (1988). 30
27 Pramana-J Phys., 53, 3 (1999) 30
28 Soft Matter, 3, 896 (2007) 30
29 Tet. Lett., 46, 2607 (2005) 30
30 Liq. Cryst., 26, 939 (1999). 29
31 Chem. Soc. Rev. 40, 306 (2011) 28
32 Chem. Commun., 1600 (2004) 27
33 Synthesis, 305 (2001) 26
34 J. Mater. Chem., 10, 2483 (2000). 25
35 Liq. Cryst., 11, 157 (1992). 24
36 Chem. Phys. Lett., 306, 163 (1999) 22
37 Nature, 382, 339 (1996) 21
38 Tet. Lett., 46, 2603 (2005) 21
39 Liq. Cryst., 26, 1455 (1999) 21
40 Mol. Cryst. Liq. Cryst., 309, 291 (1998). 20



Appendix III

Publications:

Book (invited, single author, 501 pages): Chemistry of discotic liquid crystals: from monomers to polymers,
CRC Press, Boca Raton, FL, USA, 2011.

Book Chapter (invited, single author):
1. Chemistry of Columnar Liquid Crystals in Liquid Crystalline Semiconductors, Springer, UK. (in press),
2. Design Concepts and Synthesis of Discotic Liquid Crystals in the Handbook of Liquid Crystal, Wiley-VCH, (in press).
Report:
19th Conference on Liquid Crystals
Sandeep Kumar & Ravindra Dhar
Liquid Crystals Today,
Vol. 21, No. 2, April 2012, 42–44

Research Papers:


151 Liquid crystal parameters through image analysis
S. S. Sastry, S. Kumar, K. Mallika, T.Vindhya Kumari and Ha Sie Tiong
Liq. Cryst., (in press)
150 T-shaped non-symmetrical twin liquid crystalline compounds
M.C. Varia, S. Kumar and A.K. Prajapati
Liq. Cryst., 39, 933-942 (2012)
149 Enhanced Order of the Columnar Matrix in a Discotic Liquid Crystal by Insertion of ZnO Nanoparticles
Supreet, R. Pratibha, S. Kumar, K. K. Raina
Liq. Cryst., (in press)
148. Novel triphenylene-ammonium-ammonium-triphenylene-based discotic ionic liquid crystalline dimers
S.K. Gupta and S. Kumar
Liq. Cryst., (in press)
147 Effect of functionalized carbon nanotube on electro-optic and dielectric properties of a liquid crystal
V. Manjuladevi, Raj Kumar Gupta, Sandeep Kumar
J. Mol. Liq. (in press)
146 Studies on Langmuir monolayer of tricycloquinazoline-based disk-shaped liquid crystal molecules
Raj Kumar Gupta, V. Manjuladevi, C. Karthik, Sandeep Kumar, K. A. Suresh
Colloids and Surfaces A, 410, 91-97 (2012)
145 H-shaped azoester-oxymethylene containing twin liquid crystalline compounds
M. Varia, S.Kumar, A.K. Prajapati
Liq. Cryst., 39, 365-371 (2012)
144 Photoconductivity of doped hexa-alkoxy triphenylene nano composite structures
Kavitha, C., Avinash, B.s., Kumar, S., Lakshminarayanan, V.
Mater. Chem. Phys., 133, 635-641 (2012)
143 Novel triphenylenoimidazole discotic liquid crystals
Sandeep Kumar , Satyam Kumar Gupta
Tetrahedron Letters 52 (2011) 5363–5367
142 CdSe quantum dots in a columnar matrix
Kumar Sandeep; Sagar Laxmi Kishore
Chem. Commun., 47, 12182-84 (2011)
141. Carbon based liquid crystals: art and science
Hari Krishna Bisoyi and Sandeep Kumar
Liq. Cryst., 38, 1427-49 (2011)
140 Discovery of a novel ferrielectric phase of five-layer periodicity in binary mixtures of  chiral smectic liquid crystals exhibiting unusual reversed phase sequence  
A.D.L. Chandania,b,Atsuo Fukudaa, S.Kumar, and Jagdish K. Vij
Liq. Cryst. 38, 663-668 (2011)
139. Liquid Crystal Nanoscience: An Emerging Avenue of Soft Self-assembly
Hari Krishna Bisoyi and Sandeep Kumar
Chem. Soc. Rev. 40, 306 (2011).

138 Enhancement of the display parameters of 4'-pentyl-4-cyanobiphenyl (5CB) due to the dispersion of functionalized Gold Nano Particles
A. Pandey, R. Dhar, S. Kumar, R. Dabrawski
Liq. Cryst., 38, 115-120 (2011)
137. Splay and bend elastic constants in the nematic phase of some disulfide
bridged dimeric compounds
Brindaban Kundu, Santanu Kumar Pal, Sandeep Kumar, R. Pratibha, and N. V. Madhusudana
PHYSICAL REVIEW E 82, 061703 (2010).

136 The first examples of discotic liquid crystalline gemini surfactants
Sandeep Kumar and Satyam Kumar Gupta
Tetrahedron Letters, 51, 5459-5462 (2010)

135 Stress-strain relation in the collapse of Langmuir monolayer of a
dimer of disc shaped moiety
Bharat Kumar, Kattera Suresh, Satyam Kumar Gupta, and Sandeep Kumar
Journal of Chemical Physics, 133, 044701 (2010)
134. Design and synthesis of novel mesogenic calamitic and discotic materials based on photorefractive carbazole unit
M. Manickama,*, P. Iqbala, N. Spencera, P. R. Ashtona, S. Kumarb, K. J. Donovanc and Jon A. Preecea, Mol. Cryst. Liq. Cryst., 518, 84-100 (2010).
133. Discotic nematic liquid crystals: Science and Technology
Hari Krishna Bisoyi and Sandeep Kumar*
Chem. Soc. Rev. 39, 264-286 (2010)

132. Hybrid organic/inorganic nanocomposite as a quasi one-dimensional semiconductor under ambient conditions
Kumar PS, Kumar S, Lakshminarayanan V
J. Appl. Phys., 106 , 093701,  2009.
131. Self-Assembled Superlattices of Gold Nanoparticles in a Discotic Liquid Crystal
D. Vijayaraghavan and Sandeep Kumar,
Mol. Cryst. Liq. Cryst., Vol. 508, pp. 101–114, 2009.
130. Novel banana-discotic hybrid architectures
Hari Krishna Bisoyi, H. T. Srinivasa and Sandeep Kumar*
Beilstein Journal of Organic Chemistry 2009, 5:52 doi:10.3762/bjoc.5.52
129. A nanophase segregated mesophase morphology in self-organized novel disc-rod oligomesogens
Hari Krishna Bisoyi, V. A. Raghunathan and Sandeep Kumar*
Chem Commun. 2009, 7003–7005.
128. Novel Benzene-Bridged Triphenylene-Based Discotic Dyads
Satyam Kumar Gupta, V. A. Raghunathan, V. Lakshminarayanan, and Sandeep Kumar*
J. Phys. Chem. B 2009, 113, 12887–12895
127. Playing with discs (Invited Article),
Sandeep Kumar
Liq. Cryst. 36, 607-638, 2009.
126. Synthesis and characterization of bent-shaped azobenzene monomers: guest-host effects in liquid crystals with azo dyes for optical image storage devices
Optical Materials 32 (2009) 176–183
125. Carbon Nanotubes in Discotic Liquid Crystals
Hari Krishna Bisoyi and Sandeep Kumar
Journal of the Indian Institute of Science, 89, 101-112 ( 2009)
124. Synthesis and mesomorphic properties of non-symmetric liquid crystalline dimers containing azobenzene groups
Md L. Rahman, J. Asik, S. Kumar, S. Silong, M. Zaki Ab Rahman
Phase. Trans., 82, 228-239 (2009).
123. Unusual odd–even effects depending on the monomer chai length in nematic liquid crystals made of rod-like dimmers
Brindaban Kundu, Santanu Kumar Pal, Sandeep Kumar, R. Pratibha and N. V. Madhusudana
Euro Phys. Lett., 85, 36002 (2009)
122. Hierarchical discs
Sandeep Kumar
Liquid Crystals Today, 18, 2-27 (2009).
121. Synthesis and photoswitching properties of bent-shaped liquid crystals containing azobenzene monomers
Lutfor Rahmana*, Sandeep Kumarb, Carsten Tschierskec, Gunter Israelc, Diana Sterc and Gurumurthy Hegded
Liq. Cryst. 36, 397-407 (2009).
120. Microwave-assisted facile synthesis of discotic liquid crystalline symmetrical donor-acceptor-donor triads
Satyam Kumar Gupta, V. A. Raghunathan and Sandeep Kumar
New J. Chem., 33, 112-118 (2009)

119. Optimization of the display parameters of a room temperature twisted nematic display material (6CHBT) by doping single-wall carbon nanotubes
R. Dhar1,2, Abhay S. Pandey, M. B. Pandey, Sandeep Kumar, and R. Dabrowski
Appl. Phys. Ex.  1, 121501 (2008).
118. Liquid crystalline banana-shaped monomers derived from 2,7-naphthalene: synthesis and properties
Md L. Rahman, J. Asik , S. kumar, C. Tschierske
Liq. Cryst. 35, 1263, 2008.
117. Spatiotemporal patterns in a Langmuir monolayer due to driven  molecular precession
R.K. Gupta,  K.A. Suresh,  S. Kumar, L.M. Lopatina,  R.L.B. Selinger,  J.V. Selinger
Phys. Rev. E  78, 041703 (2008)
116. Monolayer of amphiphilic functionalized gold nanoparticles at an air-water interface
Raj Kumar Gupta, K.A. Suresh, and Sandeep Kumar
Phys. Rev. E 78, 032601 ( 2008).
115. Synthesis of Liquid Crystalline Material based on 1,3,5-triphenylbenzene and 2,4,6-triphenyl-1,3,5-s-triazine
Sambasivarao Kotha, Dhurke Kashinath and Sandeep Kumar
Tet. Lett. 49, 5419-23 (2008).
114. Room-temperature electron-deficient discotic liquid crystals: facile synthesis and mesophase characterization
Hari Krishna Bisoyi and Sandeep Kumar*
New J. Chem., 32, 19754 (2008).
113. Thermodynamic, optical and dielectric studies of the homologous members of
columnar discotic compound Rufigallol hexa-n-alkoxylates
R. Dhar, S. Kumar,M. Gupta, V.K. Agrawal
J.  Molecular Liq., 141, 19-24 (2008).
112. Experimental study of high-temperature smectic-CFI2_ phase in chiral smectic liquid crystals that exhibit phase-sequence reversal
K.L. Sandhya,  Yu.P. Panarin,  J.K. Song,  J.K. Vij,  S. Kumar
Phys. Rev. E , 77, 051707 (2008).
111. Electrical conductivity studies on discotic liquid crystal-ferrocenium donor-acceptor system
P. Suresh Kumar, S.Kumar, V. Lakshminarayanan
J. Phys. Chem. B, 112, 4865 (2008).
110. Carbon nanotubes in monomeric and polymeric discotic liquid crystals
Hari Krishna Bisoyi and Sandeep Kumar
J. Mater. Chem. , 18, 3032-39 (2008).
109. Synthesis and characterization of novel rod-disc oligomers
Santanu Kumar Pal, Sandeep Kumar* and Jhumur Seth
Liq. Cryst., 35, 521-25 (2008).
108. First examples of monodisperse discotic liquid crystal pentamers: synthesis and mesomorphism
Hari Krishna Bisoyi and Sandeep Kumar
Tet. Lett. 49, 3628-31 (2008)
107. Novel Triphenylene-based Ionic Discotic Liquid Crystalline Polymers
Santanu Kumar Pal and Sandeep Kumar
Liq. Cryst. 35, 381 (2008)
106. Microwave-assisted facile synthesis of liquid crystalline nonsymmetrical hexaalkoxytriphenylenes containing a branched chain and their characterization
Hari Krishna Bisoyi and Sandeep Kumar
J. Phy. Org. Chem., 21, 47-52 (2008).
105. Green chemistry approach to the synthesis of liquid crystalline materials
Sandeep Kumar, Hari Krishna Bisoyi and Santanu Kumar Pal
Mol. Cryst. Liq. Cryst., 480, 287-294 (2008).
104. Rufigallol-based self-assembled supramolecular architectures (Invited article)
Sandeep Kumar
Phase. Trans., 81,113-128 (2008).
103 Characteristic dielectric parameters of columnar discotic hexa-n-alkoxyanthraquinones
Dhar R, Gupta M, Agrawal VK, Kumar S,
Phase. Trans., 81, 459-69 (2008).

102. Synthesis and mesomorphic properties of banana-shaped monomers containing naphthalene as central core.
Md Lutfor Rahman, J. Asik, S. Kumar. C. Tschierske
Electronic Liq Cryst Commun., Octber 23, (2007)
101. Films of novel ionic discotic mesogenic molecules at air-water and air-solid interfaces.
A. Nayak, K.A. Suresh, S.K. Pal, S. Kumar
J. Phy. Chem. B, 111, 11157-61 (2007).
100. Comment on “Optical and Resonant X-Ray Diffraction Studies Confirm a SmC*FI2- SmC* Liquid Crystal Phase Sequence Reversal”
K.L. Sandhya, Yu. P. Panarin, U. Manna, J.K. Vij, S. Kumar
Phys. Rev. Lett. 98, 219801 (2007).
99. Microwave-assisted synthesis of Rufigallol and its novel room-temperature liquid crystalline derivatives
H.K. Bisoyi and Sandeep Kumar
Tet. Lett. 48, 4399 (2007).
98. Discotic-functionalized Nanomaterials
Sandeep Kumar
Synthesis and Reactivity in Inorganic,Metal-organic and Nano-Metal Chemistry, 37, 327 (2007).
97. Synthesis of monohydroxy-functionalized triphenylene discotics
S.K. Pal, H.K. bisoyi and Sandeep Kumar
Tetrahedron 63, 6874 (2007).
96. Novel Conducting Nanocomposites: Synthesis of Triphenylene-covered Gold Nanoparticles and their Insertion into a Columnar Matrix
S. Kumar, S. K. Pal, P. Suresh Kumar and V. Lakshminarayanan
Soft Matter, 2, 896 – 900 (2007).
*95. Dielectric investigations of columnar discotic Rufigallol hexaalkanoates
M. Gupta, R. Dhar, V.K. Agrawal, Sandeep Kumar
Proceedings:  16th Conference on Liquid Crystals, pp. 109-116, (2007). (Ed. J. Zielinski) (ISBN: 978-83-89399-47-2).
94. Twist viscoelastic coefficient of novel thiol terminated alkoxy-cyanobiphenyl nematic liquid crystals
A.K. Agarwal, K.A. Suresh, S.K.Pal, S. Kumar
J. Chem. Phys., 126, 164901 (2007).
93 Dispersion of thiol stablized gold nanoparticles in lyotropic liquid crystalline systems
P. Suresh Kumar, Santanu K. Pal, Sandeep Kumar and V. Lakshminarayanan
Langmuir, 23, 3445 (2007).
92. Aligned Carbon Nanotubes in the Supramolecular order of Discotic Liquid Crystals.
Sandeep Kumar and H.K. Bisoyi
Angew. Chem. Int. Ed. 46, 1501 (2007).
91. Self-assembled monolayers (SAMs) of alkoxycyanobiphenyl thiols on gold surface using a lyotropic liquid crystalline medium
V. Ganesh, Santanu Kumar Pal, Sandeep Kumar and V. Lakshminarayanan
Electro. Chem. Acta.  52, 2987 (2007).
90. Phase transitions in novel disulfide-bridged alkoxycyanobiphenyl dimers
S.K. Pal, V.A. Raghunathan and S. Kumar
Liq Cryst., 34, 135 (2007).

89. Microwave-assisted synthesis of novel imidazolium-based ionic liquid crystalline dimers
Santanu Kumar Pal and Sandeep Kumar
Tet. Lett. 47, 8993 (2006).
88. Mesomorphism in Columnar phases Studied by Solid State Nuclear
Magnetic Resonance
S.V. Dvinskikh, J. Thaning, B. Stevensson, K. Jansson, S. Kumar, H. Zimmermann and A. Maliniak
Phys. Rev. E, 74, 021703 (2006).
87 Light-induced Formation of Curved Needle Texture by Circular Polarized Light Irradiation on a Discotic Liquid Crystal Containing a Racemic Chromium Complex
Nobuhiro Anzai, Hiroko Kurihara, Masato Sone, Hidemitsu Furukawa, Toshiyuki Watanabe, Kazuyuki Horie and Sandeep Kumar
Liq Cryst., 33, 671 (2006).
86 Microwave-assisted facile synthesis of liquid crystalline alkoxycyanobiphenyls
Sandeep Kumar and Hari Krishna Bisoyi
Phase Transition, 79, 285 (2006).
85 Effect of slow cooling on a discotic nematic liquid crystal: Evidences for nematic- nematic transitions
D. Vijayaraghavan and Sandeep Kumar
Mol. Cryst. Liq. Cryst., 452, 11 (2006).
84 Self-assembled monolayers (SAMs) of alkoxycyanobiphenyl thiols on gold-a study of electron transfer reaction using cyclic voltametry and electrochemical impedance spectroscopy
V. Ganesh, Santanu Kumar Pal, Sandeep Kumar and V. Lakshminarayanan
J. Colloid & Interface Science, 296, 195 (2006).
*83 Supramolecular Assemblies of Disc-shaped Molecules
Proceedings of The international Conference On Electronic and Photonic Materials, Devices and System EPMDS-2006, University of Calcutta, F1
82 Self-organization of disk-like molecules: chemical aspects (Invited article)
Sandeep Kumar
Chem. Soc. Rev. 35, 83 (2006).
81 Triphenylene-based discotic dimers, oligomers and polymers
(Invited article)
Sandeep Kumar
Liq. Cryst., 32, 1089 (2005).
80 Phase behaviour of three homologues discotic mesogens of hexa-n-alkoxyanthraquinone under pressure
Y. Maeda, H. Yokoyama and Sandeep Kumar
Liq. Cryst. 32, 833 (2005)
79 Ionic discotic liquid crystals: synthesis and characterization of pyridinium bromides containing a triphenylene core
Sandeep Kumar and Santanu Kumar Pal
Tet. Lett. 46, 4127 (2005).
78 The first examples of terminally thiol-functionalized alkoxycyanobiphenyls
Sandeep Kumar and Santanu Kumar Pal
Liq. Cryst., 32, 659 (2005).
77 Discotic-decorated gold nanoparticles
Sandeep Kumar, Santanu K. Pal and V. Lakshminarayanan
Mol. Cryst. Liq. Cryst., 434,  251 (2005).
76 Synthesis and characterization of novel imidazolium-based ionic discotic liquid crystals with a triphenylene moiety
Sandeep Kumar and Santanu Kumar Pal
Tet. Lett. 46, 2607 (2005).
75 A convenient and economic method for the synthesis of monohydroxy-pentaalkoxy- and hexaalkoxytriphenylene discotics
Sandeep Kumar and B. Lakshmi
Tet. Lett. 46, 2603 (2005).
74 Recent developments in the chemistry of triphenylene-based discotic liquid crystals (Invited article)
Sandeep Kumar
Liq. Cryst., 31, 1037 (2004)
73. Inclusion of gold nanoparticles into a discotic liquid crystalline matrix
Sandeep Kumar and V. Lakshminarayanan
Chem. Commun., 1600 (2004).
72.   Cyclic Voltametry Studies of discotic liquid crystals.
R.J. Bushby, O.W. Lozman, L. A. Mason, N. Taylor, Sandeep Kumar
Mol. Cryst. Liq. Cryst., 410, 171 (2004).
71.   Combination of Electron-deficient and Electron-rich Discotic Liquid Crystals in Novel Unsymmetrical Columnar Twins
Sandeep Kumar, Jaishri J. Naidu and S. K. Varshney
Mol. Cryst. Liq. Cryst., 411, 355 (2004).
70. Molecular engineering of discotic nematic liquid crystals
Sandeep Kumar
Pramana, 61, 199 (2003).
69. Electrooptical and viewing characterisation of a display device employing discotic nematic liquid crystal
G.G. Nair, D.S.S. Rao, S.K. Prasad, S. Chandrasekhar, Sandeep Kumar
Mol. Cryst. Liq. Cryst., 397, 245[545], (2003).
68. High pressure investigations on the phase behaviour of discotic liquid crystals
D.S.S. Rao, S.K. Prasad, R.K. Bomezai, Sandeep Kumar
Mol. Cryst. Liq. Cryst., 397, 143[443], (2003).
67. Phase behaviour of the discotic mesogen HHTT under pressure
Y. Maeda, D.S.S. Rao, S.K. Prasad, S. Chandrasekhar, Sandeep Kumar
Mol. Cryst. Liq. Cryst., 397, 129[429], (2003).
66.   X-Ray studies on columnar structures of discotic liquid crystals
S.K. Prasad, D.S.S. Rao, S. Chandrasekhar, Sandeep Kumar
Mol. Cryst. Liq. Cryst., 396, 121 (2003).
65. Triphenylene/Carbazole mesogens and their electrochemistry
M. Manickam, G. Cooke, Sandeep Kumar, P.R. Ashton, J.A. Preece, N. Spencer
Mol. Cryst. Liq. Cryst., 397, 99[399], (2003).
64. Novel anthraquinone based metallomesogens
J.J. Naidu, Sandeep Kumar
Mol. Cryst. Liq. Cryst., 397, 17[317], (2003).
63. Room-temperature discotic nematic liquid crystals
Sandeep Kumar, S.K. Varshney, D. Chauhan
Mol. Cryst. Liq. Cryst., 396, 241 (2003).
62. Novel monofunctionalized electron-deficient anthraquinone discotic liquid crystals
Sandeep Kumar, Jaishri J. Naidu and S. K. Varshney
Liq. Cryst., 30, 319 (2003)
61. Surface Morphology and Molecular Ordering in Thin Films of Polymerizable Triphenylene Discotic Liquid Crystals on HOPG Revealed by Atomic Force Microscopy
H. Schonherr, M. Manickam, and S. Kumar
Langmuir, 18, 7082 (2002).
60. The first columnar discotic liquid crystalline anthraquinone metal complexes
Sandeep Kumar and Jaishri J. Naidu
Liq. Cryst., 29, 1369 (2002)
59. Novel Hexasubstituted Triphenylene Discotic Liquid Crystals Having Three Different Types of Peripheral Substituents
Sandeep Kumar and Jaishri J. Naidu
Liq. Cryst. 29, 899 (2002)
58. Orientation Of Discotic And Ferroelectric Liquid Crystals In Macroporous
Silicon Matrix
TS Perova, EV Astrova, SE Tsvetkov, AG Tkachenko, JK Vij and S Kumar,
Physics of the Solid State,  44, (6), 1196-1202 (2002).
57. Dibenzo[fg,op]naphthacene Discotics: A Versatile Rational Synthesis
Sandeep Kumar, Jaishri J. Naidu and D.S. Shankar Rao
J. Mater. Chem, 12, 1335 (2002).
56. Synthesis of first anthraquinone copper complex displaying columnar phase induced by noncovalent - interactions
Sandeep Kumar and Jaishri J. Naidu
Mol. Cryst. Liq. Cryst., 378, 123 (2002).
55. Dibenzo[g,p]chrysene, a novel core for discotic liquid crystals
Sandeep Kumar and Sanjay K. Varshney
Mol. Cryst. Liq. Cryst., 378, 59 (2002).
54. Design and synthesis of discotic nematic liquid crystals
Sandeep Kumar and Sanjay K. Varshney
Org. Lett., 4, 157 (2002).
53. Discotic liquid crystals for solar cells
Sandeep Kumar
Current Science, 82, 256 (2002).
52. Phase behaviour of the discotic mesogen 2,3,6,7,10,11-hexahexylthiotriphenylene (HHTT) under hydrostatic pressure
Y. Maeda, D.S.S. Rao, S.K. Prasad, S. Chandrasekhar, S. Kumar
Liq. Cryst. , 28, 1679 (2001).
51. The first hexagonal columnar discotic liquid crystalline carbazole derivatives induced by noncovalent - interactions
M. Manickam, M. Belloni, Sandeep Kumar, S. k. Varshney, D.S. Shankar Rao, P.R. Ashton,  J. A. Preece, and Neil Spencer
J. Mater. Chem., 11, 2790 (2001).
50. First Rational Synthesis of Dibenzo[fg,op]naphthacene Discotics  
Sandeep Kumar and Jaishri J. Naidu
Liq. Cryst., 28, 1435 (2001).
49. Triplet excitation transfer in triphenylene columnar phase
D. Markovitsi, Sylvie Marguet, Jens Bondkowski, sandeep Kumar
J. Phys. Chem. B, 105, 1299 (2001).
48. Synthesis of triphenylene and dibenzopyrene derivatives; vanadium oxytrichloride a novel reagent
Sandeep Kumar and Sanjay K. Varshney
Synthesis, 305 (2001).
47. A new form of discotic metallomesogens: Synthesis of metal bridged triphenylene discotic dimers
Sandeep Kumar and Sanjay K. Varshney
Liq. Cryst., 28, 161 (2001).
46. Novel liquid-crystalline mercury acetylide complexes
Sandeep Kumar, S. K. Varshney, D.S. S. Rao and S. K.Prasad
Mol. Cryst. Liq. Cryst., 357, 55 (2001).
45. Observation of the orientational transition in hexa-(hexylthio)triphenylene using FTIR spectroscopy
T. Perova, S. Tsvetkov, J.K. Vij and S. Kumar
Mol. Cryst. Liq. Cryst., 351, 95 (2000).
44. A room temperature discotic nematic liquid crystal
Sandeep Kumar and Sanjay K. Varshney
Angew. Chem. Int. Ed. Eng., 39/17, 3140 (2000).
43. Novel heptasubstituted triphenylene discotic liquid crystals
Sandeep Kumar, M. Manickam, Sanjay K. Varshney, D.S. Shankar Rao and S. K. Prasad
J. Mater. Chem., 10, 2483 (2000).
42. The first hexagonal columnar discotic liquid crystalline carbazole derivative
M. Manickam, Sandeep Kumar, Jon A. Preece and Neil Spencer
Liq. Cryst., 27, 703 (2000).
41. Synthesis of Phenanthro[b]phenazine, a Novel Heterocyclic Ring Structure for discotic liquid crystals.
Sandeep Kumar  and M. Manickam
Mol. Cryst. Liq. Cryst., 338, 175 (2000).
40. STM investigation of tricycloquinazoline liquid crystals on gold
Renate Hiesgen, Holger Schonherr, Sandeep Kumar, Helmut Ringsdorf and Dieter Meissner
Thin Solid Films, 358, 241 (2000).
*39. A wide viewing angle LCD using a discotic nematic material
S. Chandrasekhar, S.Krishna Prasad, Geetha G. Nair, D.S. Shankar Rao, S. Kumar ,  M. Manickam
EuroDisplay ’99 , The 19th International Display Research Conference Late-news papers , 9, 1999.
38. The influence of the properties of the substrate surface on the alignment of discotic liquid crystals
S.E. Tsvetkov, T.S. Perova, J.K. Vij, D. Simpson, S. Kumar and F. Vladimirov
Mol. Cryst. Liq. Cryst. Mol. Materials, 11, 267 (1999)
37. New branched chain tricycloquinazoline derivatives: a room temperature electron deficient discotic system."
Sandeep Kumar, D.S. Shankar rao and S. Krishna Prasad
   J. Mater. Chem., 9, 2751 (1999).
36. Vanadium oxytrichloride, a novel reagent for the oxidative trimerization of o-dialkoxybenzenes to hexaalkoxytriphenylenes
Sandeep Kumar and Sanjay K. Varshney
Liq. Cryst., 26, 1841 (1999)
35. Quasi-one dimensional electrical conductivity and thermoelectric power studies on a discotic liquid crystal
V.S.K. Balagurusamy, S. Krishna Prasad, S. Chandrasekhar, Sandeep Kumar, M. Manickam and C.V. Yelamaggad
Pramana, 53, 3 (1999).
34. First example of a functionalized triphenylene discotic trimer: Molecular engineering of advanced materials  
S. Kumar and M. Manickam
Liq. Cryst., 26, 939 (1999).
33. First examples of functionalized triphenylene discotic dimers: Molecular engineering of advanced materials  
S. Kumar, M. Manickam, and H. Schonherr
Liq. Cryst., 26, 1567 (1999).
32. Dielectric and High Pressure Investigations on a Thermotropic Cubic Mesophase
D.S. Shankar Rao, S. Krishna Prasad, Veena Prasad and Sandeep Kumar
Phys. Rev. E , 59, 5572 (1999).
31. Electronic Coupling Responsible for Energy transfer in columnar mesophases
D. Markovitsi, S. Marguet, L. Gallos, Herve Sigal, P. Millie, P. Argyrakis, S. Kumar and H. Ringsdorf
Chem. Phys. Lett., 306, 163 (1999)
30. Synthesis of phenanthro[a]phenazine derivatives, a novel ring structure forming discotic liquid crystals
Sandeep Kumar and M. Manickam
Liq. Cryst., 26, 1097(1999).
29. Electrophilic Aromatic Substitution in Triphenylene Discotics: Synthesis of Alkoxynitrotriphenylenes
Sandeep Kumar, M. Manickam, V.S.K. Balagurusamy, H. Schonherr
Liq. Cryst., 26, 1455 (1999).
28. New mixed tail triphenylene discotic liquid crystals
M. Manickam and Sandeep Kumar
Mol. Cryst. Liq. Cryst., 326, 165 (1999).
27. High Pressure Studies on Hexa-n-alkoxy Triphenylene Homologous Series
D.S. Shankar Rao, Vivek Kumak Gupta, S.Krishna Prasad, M. Manickam and Sandeep Kumar
Mol. Cryst. Liq. Cryst., 319, 193 (1998).
26. New Chiral Discotic Liquid Crystals
C.V. Yelamaggad, Veena Prasad, M. Manickam and Sandeep Kumar
Mol. Cryst. Liq. Cryst.,  325, 33 (1998).
25. Influence of Disorder on the Electronic Exited States: An Experimental and Numerical Study of Alkylthiotriphenylenes  Columnar Phases
S. Marguet, D. Markovitsi, P. Millie, H. Sigal and Sandeep Kumar
J. Phys. Chem.B, 102, 4697 (1998).
24. Novel unsymmetrical triphenylene discotics: First synthesis of 1,2,3,6,7,10,11- heptaalkoxytriphenylenes
Sandeep Kumar and M. Manickam
J. Chem. Soc. Chem. Commun.,  1427 (1998).
23. Dielectric Studies on Strongly Polar Discotic Liquid Crystals
Geetha G. Nair, S.Krishna Prasad, S. Kumar and M. Manickam
Mol. Cryst. Liq. Cryst.,  319, 89 (1998).
22. Synthesis of Functionalized Triphenylenes by Selective Ether Cleavages with Catechol Boron Bromide.
Sandeep Kumar and M. Manickam
Synthesis,  1119 (1998).
21. Nitration of Triphenylene Discotics: Synthesis of Mononitro-, Dinitro- and Trinitro-Hexaalkoxy Triphenylenes
Sandeep Kumar and M. Manickam
Mol. Cryst. Liq. Cryst., 309, 291 (1998).
20. How Can Crystals Be Liquid? Paradoxical states of matter
S. Chandrasekhar and Sandeep Kumar
Science Spectra, (8) 66 (1997).
19. Oxidative Trimerization of o-Dialkoxybenzenes to Hexaalkoxytriphenylenes: Molybdenum(V) Chloride as a Novel Reagent
Sandeep Kumar and M. Manickam
J. Chem. Soc, Chem. Commun., 1615 (1997).
18. Using Antibodies to Perturb the Coordination Sphere of a Transition Metal Complex
P. Ghosh, D. Shabat, Sandeep kumar, S. C. Sinha, F. Grynszpan, J. L., Louis Noodleman and E. Keinan
Nature, 382, 339 (1996).
17. Synthesis and Characterization of Fluorescent, Low-Symmetry Triphenylene Discotic Liquid Crystals: Tailoring of Mesomorphic and Optical properties
J.A. Rego, Sandeep Kumar, and H. Ringsdorf
Chem. Mater.,  8, 1402 (1996).
16. Synthesis of New Functionalized Discotic Liquid Crystals for Photoconducting Applications
Sandeep Kumar, P. Schuhmacher, P. Henderson, J.A. Rego and H. Ringsdorf
Mol. Cryst. Liq. Cryst., 288, 211 (1996).
15. Synthesis of Novel Mixed Tail Triphenylene Discotic Liquid Crystals-the Search for Higher Order
J.A. Rego, Sandeep Kumar, Ivan J. Dmochowski and H. Ringsdorf
J. Chem. Soc, Chem. Commun., 1031 (1996).
14. A Simple, Rapid, One-Step Synthesis of Aryl Poly Ethers from Aryl Acetates: Improved synthesis of Hexaalkoxytricycloquinazoline Derivatives
Sandeep Kumar
Mol. Cryst. Liq. Cryst., 289, 247 (1996).
13. Self-Assembled Monolayers of Diacotic Liquid Crystalline thioethers, Discoid Disulfides, and Thiols on Gold: Molecular Engineering of Ordered Surfaces
H. Schonherr, F.J.B. Kremer, S. Kumar, J.A. Rego, H. Wolf, H. Ringsdorf, M. Jaschke, H.-J. Butt and E. Bamberg
J.Am.Chem.Soc., 118, 13051 (1996).
*12. Discotic Liquid Crystals: Synthesis and Potential Applications
Sandeep Kumar
Proc. of the V National Seminar on Liquid Crystals, Nov. 1-3, p-81 (1996).
11. The Synthesis of Alkoxybromotriphenylenes: New Discotic Liquid Crystals and Valuable Precursors to "Mixed Tail" Discotics.
Philippe Henderson, Sandeep Kumar, James A. Rego, Helmut Ringsdorf, Peter Schuhmacher
J. Chem. Soc. Chem. Commun., 1059-60 (1995).
10. Withametelin H and Withafastuosin C, Two New Withanolides from the Leaves of Datura Species
M. Manickam, S. Kumar, A. Sinha-Bagchi, S.C. Sinha, A.B. Ray
J. Ind. Chem. Soc., 71, 393-99 (1994).
9. Evidence for a cyclic mechnism in (n3-allyl)palladium chemistry.Promotion of B-hydride elimination by unsaturated organometallics.
Ehud Keinan, Sandeep Kumar, Vered dangur and Jacob Vaya
J. Am. Chem. Soc., 116, 11151-52 (1994).
8. Hexaalkoxytricycloquinazoline: New Discotic Liquid Crystals.
Sandeep Kumar, Ellen J. Wachtel and Ehud Keinan
J. Org. Chem., 58, 3821-27 (1993).
7. New discotic liquid crystals having tricycloquinazoline core.
E. Keinan, S. Kumar, S.P. Singh, R. Ghirlando, E.J. Wachtel
Liquid Crystals, 11, 157-73 (1992).  
6. Trisubstituted decacyclene derivatives. Bridging the gap between the carbonaceuos mesophase and discotic liquid crystals.
E. Keinan, S. Kumar, R. Moshenberg, R. Ghirlando, E.J. Wachtel
Advanced Materials, 30, 251-54 (1991).
5. Synthetic Modifications of Withanolides with an a Oriented Side Chain.
Erwin Glotter, Sandeep Kumar, Mahendra Sahai, (the late) Alex Goldman, Isaac Kirson, Marioara Mendelovici
J. Chem. Soc. Perkin Trans., 1, 739-45 (1991).
4. Ethyl Brevifolin Carboxylate from Flueggea microcarpa.
H.E. Gottlieb, Sandeep Kumar, M. Sahai, A.B. Ray
Phytochemistry, 30, 2435-38 (1991).
3. Cleomiscosin D, coumarino-lignan of Cleome viscosa  seeds.
Sandeep Kumar, A.B. Ray, C. Konno, Y. Kiso, H. Hikino
Phytochemistry, 27,  636 -38 (1988).
2. Chemical constituents of the seeds of Flueggea microcarpa.
Sandeep Kumar, M. Sahai and A.B. Ray,
Planta Medica, 466 (1985).
1. Structure of Cleomiscosins, coumarino-lignoids of Cleome viscosa seeds.
A.B. Ray, S.K. Chattopadhyay, Sandeep Kumar, C. Konno, Y. Kiso, H. Hikino
Tetrahedron, 41, 209 -14 (1985).

• In proceedings


Appendix IV

Patents:
1. A one-step preparation of 2,6,6-trimethylcyclohexa-1,3-diene-1-carboxaldehyde
(safranal) from a mixture of 2,6,6-trimethylcyclohex-1and 2-ene-1-carboxaldehydes; Kumar, Sandeep; Kulkarni, Ashok Krishna; Sukh Dev; Indian IN 164,929 (Cl.C07C47/42), 08 Jul 1989; 9pp.
2. Derivatives of Tricycloquinazoline and Methods of their Preparation; Keinan, E., Timrat, I.L., Kumar, Sandeep.
German Patent, P4340408.1 dated 1.6.1995.
3. Use of low-molecular wt. and/or polymeric organic compounds having columnar helical phase with liquid crystalline properties; Paulus, W., Haeusling. L., Siemensmeyer, K., Etzbach, K.H., Adam, D., Simmerer, J., Ringsdorf, H., Schuhmacher, P., Haarer, B., Kumar, S.
German Patent DE 4.429.597 dated 22.02.1996.
4. Liquid Crystal Display Device
S. Chandrasekhar, S.Krishna Prasad, Geetha G. Nair, D.S. Shankar Rao, S. Kumar ,  M. Manickam
Korean Patent, Publication No. 1019990076558 A, Appli. No. 1019980055028,  Registration No. 1005091800000 (2005)
5. An improved liquid crystal display device; S. Chandrasekhar, S.K. Prasad, G. G. Nair, D.S. S. Rao, S. Kumar, M. Manickam
European Patent   EP0990943 (2007).
6. Liquid Crystal Display Device; S. Chandrasekhar, S.K. Prasad, G. G. Nair, D.S. S. Rao, S. Kumar, M. Manickam
US Patent   6,558,759 (2003).

Education

    Liquid Crystal Chemistry

Areas of Research / Professional Expertise

    Chemistry, Liquid Crystals, Nanoscience,

Books

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 Featured Title - Chemistry of Discotic Liquid Crystals - 1st Edition book cover