Mu Bin, Zhao Yu, Li Xun, Quan Xuhong, Tian Wei
Shanxi Key Laboratory of Macromolecular Science and Technology, MOE Key Laboratory of Material Physics and Chemistry under Extraordinary Conditions, School of Chemistry and Chemical Engineering , Northwestern Polytechnical University , Xi'an 710072 , China.
ACS Appl Mater Interfaces. 2020 Feb 26;12(8):9637-9645. doi: 10.1021/acsami.9b20769. Epub 2020 Feb 17.
Developing discotic columnar liquid crystals (LCs) with both high electrical conductivity and strong luminescence remains a challenge because the intracolumnar interdisc π-π stacking usually in ordered discotic columnar LCs is essential to generate charge transport pathways but normally detrimental to light emissions. We here present tricyanotristyrylbenzene-based quasi-discotic LCs upon bearing three wedge-shaped alkyl tails for addressing this issue. The resulted columnar materials displayed both high electrical conductivity and strong luminescence, especially for the ones stabilized by multivalent hydrogen-bonding interactions. Besides, an interesting thermochromic luminescence tuning behavior in a smooth manner was observed over a wide wavelength range for the hydrogen bond-stabilized columnar LCs. This study will lead to the future design and application of new multifunctional optoelectronic materials by integrating excellent conductivity and luminescence tuning behaviors.
开发兼具高电导率和强发光性的盘状柱状液晶（LCs）仍然是一项挑战，因为在有序盘状柱状液晶中，柱内盘间的π-π堆积对于产生电荷传输路径至关重要，但通常对发光不利。我们在此展示了基于三氰基三苯乙烯的准盘状液晶，其带有三个楔形烷基链以解决此问题。所得的柱状材料表现出高电导率和强发光性，特别是对于那些通过多价氢键相互作用稳定的材料。此外，对于氢键稳定的柱状液晶，在很宽的波长范围内观察到了有趣的热致变色发光调谐行为。这项研究将通过整合优异的导电性和发光调谐行为，引领新型多功能光电子材料的未来设计与应用。
