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A Photo‐Responsive Organogel Based on Pyrene‐Substituted Acylhydrazone Derivative
Author(s) -
Chai Qing,
Wei Jue,
Bai Binglian,
Wang Haitao,
Li Min
Publication year - 2017
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.201700388
Subject(s) - chemistry , pyrene , isomerization , photochemistry , fluorescence , irradiation , derivative (finance) , photoisomerization , polymer chemistry , organic chemistry , catalysis , physics , quantum mechanics , nuclear physics , financial economics , economics
A new simple pyrene‐substituted acylhydrazone derivative, 4‐(3,4‐dioctyloxy) phenyl‐1‐pyrene acylhydrazone (PAH‐8), was designed and synthesized. The PAH‐8 can form thermo‐reversible organogel in DMSO, and shows gelation‐induced enhanced fluorescence emission. Xerogel exhibits ribbon‐like fibrous aggregates with widths of 0.5‐1 μm. The PAH‐8 organogel indicates photo‐responsive behaviors due to the trans‐cis isomerizations of ‐C=N‐ bond upon exposure to visible or UV light. Upon visible light irradiation, the partial trans‐cis isomerization of the ‐C=N‐ bond causes the fiber morphology to disappear, resulting in gel‐sol transition, whereas the PAH‐8 organogel exhibits few photoisomerizations from trans to cis transition without breakage of the gel state upon UV light irradiation.