Please use this identifier to cite or link to this item:
Title: Room-temperature discotic liquid crystals based on oligothiophenes - Attached and fused triazatruxenes
Authors: Luo, J. 
Zhao, B. 
Shao, J.
Lim, K.A.
On Chan, H.S. 
Chi, C. 
Issue Date: 2009
Citation: Luo, J., Zhao, B., Shao, J., Lim, K.A., On Chan, H.S., Chi, C. (2009). Room-temperature discotic liquid crystals based on oligothiophenes - Attached and fused triazatruxenes. Journal of Materials Chemistry 19 (44) : 8327-8334. ScholarBank@NUS Repository.
Abstract: A new class of discotic liquid crystals based on oligothiophenes - attached and fused triazatruxenes, were synthesized in high yields. The synthesis was carried out first by microwave-assisted six-fold Stille cross-coupling reactions to yield the hexakis-oligothiophenes - substituted triazatruxenes TAT-T1 and TAT-T2 and followed by successful oxidative cyclodehydrogenation of TAT-T1 to afford the planar TAT-T1-C with an extended core. Their optical properties, electronic properties, thermal behavior and self-assembly were investigated by various techniques. UV-vis absorption and fluorescence spectroscopic measurements demonstrate that TAT-T1-C is a largely delocalized and rigid polycyclic aromatic π-system. All of these disk-like molecules, in particular TAT-T1-C, show a strong π-π interaction in the solid state and exhibit columnar liquid crystalline properties at room temperature with a wide-range mesophase. Elongation of the peripheral oligothiophene arms or expansion of the rigid core size upon cyclization of the neighbouring thiophene moieties gives rise to dramatic increases of both the isotropic temperatures and the mesophase width. © 2009 The Royal Society of Chemistry.
Source Title: Journal of Materials Chemistry
ISSN: 09599428
DOI: 10.1039/b913930c
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.


checked on Dec 1, 2021


checked on Dec 1, 2021

Page view(s)

checked on Dec 2, 2021

Google ScholarTM



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.