期刊
DYES AND PIGMENTS
卷 205, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.dyepig.2022.110490
关键词
Self-assembly; Liquid crystal; Organogel; WLED; Acid-base vapors sensor; Information storage
资金
- National Natural Science Foundation of China [21865038]
- Yunling Scholar Training Program [KC194320]
- Innovative Research Team in Yunnan Province [2018FY001 (-012)]
- Yunnan University Supercomputer Center
Two bent shaped isomers based on benzo[1,2-b:4,3-b']dithiophene-pyridine have been synthesized, and the position of N-atom on the pyridine unit has significant effects on their self-assembly behavior and photophysical properties. The isomer with N in the para position can form a columnar liquid crystalline phase and emit enhanced yellow light when doped with L-tartaric acid, making it a potential material for WLED and chemosensors for volatile acid-base vapors.
Two benzo[1,2-b:4,3-b']dithiophene-pyridine-based bent shaped isomers (3BDTPy12 and 4BDTPy12) have been synthesized via Suzuki coupling reactions as key steps. They differ themselves in the position of N-atom on the pyridine unit which has generated significant effect on their self-assembly behavior and photophysical properties. 4BDTPy12 with N in the para position in the pyridine ring can self-assemble into a columnar liquid crystalline phase while its isomer 3BDTPy12 with N in the meta position in the pyridine ring is only a crystal. Both compounds can form gels in different organic solvents but with different morphologies. The influence of the solvent polarities and doping agents including chiral L-phenylalanine (L-Phe), trifluoroacetic acid as well as L tartaric acid on their gel morphologies were also studied. The gel of 4BDTPy12 doped with L-tartaric acid could produce enhanced yellow emission which can be used to generate WLED, and such compounds can be used as chemosensors towards volatile acid-base vapors with good reversibility.
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