TNF Induced Switching of Columnar Rectangular to Hexagonal Assemblies in a New Class of Triphenylene-Based Room Temperature Discotic Liquid Crystals

2017 ◽  
Vol 121 (36) ◽  
pp. 8593-8602 ◽  
Author(s):  
Monika Gupta ◽  
Santosh Prasad Gupta ◽  
Santanu Kumar Pal
Keyword(s):  
Liquid Crystals ◽  
Room Temperature ◽  
Discotic Liquid Crystals ◽  
New Class

Phase Behavior of a New Class of Anthraquinone-Based Discotic Liquid Crystals

Langmuir ◽  
2017 ◽  
Vol 33 (48) ◽  
pp. 13849-13860 ◽  
Author(s):  
Joydip De ◽  
Santosh Prasad Gupta ◽  
Indu Bala ◽  
Sandeep Kumar ◽  
Santanu Kumar Pal
Keyword(s):  
Liquid Crystals ◽  
Phase Behavior ◽  
Discotic Liquid Crystals ◽  
New Class

Discotic liquid crystals of transition metal complexes, part 36: syntheses and mesomorphic properties of very large discotic liquid crystals based on triphenylenocyanine and 1,4-diazatriphenylenocyanine

2006 ◽  
Vol 10 (09) ◽  
pp. 1145-1155 ◽  
Author(s):  
Masahiro Ichihara ◽  
Masakazu Miida ◽  
Bernhard Mohr ◽  
Kazuchika Ohta
Keyword(s):  
Liquid Crystals ◽  
Room Temperature ◽  
Optical Microscope ◽  
Decomposition Temperature ◽  
Discotic Liquid Crystals ◽  
Large Area ◽  
Scanning Calorimetry ◽  
Nitrogen Gas ◽  
Homeotropic Alignment ◽  
Mesomorphic Properties

Two series of very large discotic complexes of tetrakis (2,3,6,7-tetraalkoxy)triphenylenocyaninato copper(II) (abbreviated as ( C n O )16 TcCu ; n = 8, 10, 12 and 14) and tetrakis(2,3,6,7-tetraalkoxy)-1,4-diazatriphenylenocyaninato copper(II) (abbreviated as ( C n O )16 TzCu ; n = 8, 10, 12 and 14), were synthesized to investigate their mesomorphic properties by differential scanning calorimetry, thermogravimetry analysis, polarizing optical microscope observation and temperature-dependent X-ray studies. The results show that each of the ( C n O )16 TcCu derivatives exhibits two or three disordered rectangular columnar ( Col rd ) mesophases from room temperature to the decomposition temperature at ca. 330-340°C under nitrogen gas. However, each of the ( C n O )16 TzCu complexes exhibits only one ordered tetragonal columnar ( Col tet.o ) mesophase in an extremely wide temperature region from room temperature to the decomposition temperature at ca 300°C and ca. 340-350°C under the atmosphere and nitrogen gas, respectively. It is very interesting that the Col tet.o mesophase of ( C n O )16 TzCu for n = 10, 12 and 14 shows remarkable spontaneous homeotropic alignment in a large area, without disclinations and polydomains, in the temperature range from room temperature to the decomposition temperature. As far as we know, these discotic liquid crystals are the first examples to show homeotropic alignment at room temperature. Furthermore, the difference between the mesomorphic properties of ( C n O )16 TcCu and ( C n O )16 TzCu originated only from the additional eight nitrogen atoms in the central core in ( C n O )16 TzCu .

Room-temperature discotic liquid crystals based on oligothiophenes—attached and fused triazatruxenes

2009 ◽  
Vol 19 (44) ◽  
pp. 8327 ◽  
Author(s):  
Jing Luo ◽  
Baomin Zhao ◽  
Jinjun Shao ◽  
Kheng Aik Lim ◽  
Hardy Sze On Chan ◽  
...  
Keyword(s):  
Liquid Crystals ◽  
Room Temperature ◽  
Discotic Liquid Crystals

Photoconductivity in Discotic Liquid Crystals: A New Class of High-Mobility Materials

1994 ◽  
Vol 252 (1) ◽  
pp. 155-164 ◽  
Author(s):  
Dietrich Haarer ◽  
Dieter Adam ◽  
Jürgen Simmerer ◽  
Fritz Closs ◽  
Dirk Funhoff ◽  
...  
Keyword(s):  
Liquid Crystals ◽  
High Mobility ◽  
Discotic Liquid Crystals ◽  
New Class

Synthesis, characterization and nonlinear optical studies of novel blue-light emitting room temperature truxene discotic liquid crystals

RSC Advances ◽  
2015 ◽  
Vol 5 (34) ◽  
pp. 26596-26603 ◽  
Author(s):  
D. R. Vinayakumara ◽  
Manish Kumar ◽  
P. Sreekanth ◽  
Reji Philip ◽  
Sandeep Kumar
Keyword(s):  
Liquid Crystals ◽  
Nonlinear Optical ◽  
Room Temperature ◽  
Discotic Liquid Crystals ◽  
Structure Property ◽  
Optical Studies ◽  
Light Emitting ◽  
Self Assembling ◽  
Structure Property Relationship ◽  
Linear And Nonlinear

A new series of discotic liquid crystals based on a truxene core has been synthesized to study the structure–property relationship in view of the self-assembling property and their linear and nonlinear optical properties.

Synthesis, Mesomorphism and Photoluminescence of a New Class of Anthracene-based Discotic Liquid Crystals

2016 ◽  
Vol 1 (16) ◽  
pp. 5075-5082 ◽  
Author(s):  
Joydip De ◽  
Shilpa Setia ◽  
Santanu Kumar Pal
Keyword(s):  
Liquid Crystals ◽  
Discotic Liquid Crystals ◽  
New Class
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