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A novel photo‐responsive organogel based on azobenzene
Author(s) -
Zhou Yifeng,
Xu Miao,
Wu Junchen,
Yi Tao,
Han Jiantao,
Xiao Shuzhang,
Li Fuyou,
Huang Chunhui
Publication year - 2008
Publication title -
journal of physical organic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.325
H-Index - 66
eISSN - 1099-1395
pISSN - 0894-3230
DOI - 10.1002/poc.1341
Subject(s) - azobenzene , photoisomerization , chemistry , hydrogen bond , alkyl , intermolecular force , polymer chemistry , photochemistry , azo compound , phase (matter) , molecule , organic chemistry , catalysis , isomerization , polymer
A novel triarmed cis ‐1, 3, 5‐cyclohexanetricarboxamides gelator, functionalized by three azobenzene moieties grafted with three long alkyl chains, was designed and synthesized. The gelator can gel most of the organic solvents in low concentration. The morphologies of the xerogels show one‐dimensional aggregated bundles or helical fibres. The azobenzene groups in the gel state form H‐type aggregation and perform expected trans–cis photoisomerization with a gel to sol phase transition upon irradiation of UV light. The main driving force for gelation is intermolecular hydrogen bonding between amides and π–π interaction of azobenzene moieties. Copyright © 2008 John Wiley & Sons, Ltd.