标题:Hydrogels Self-Assembled from an Azobenzene Building Block: Stability toward UV Irradiation in the Gel and Thin-Film States
作者:Cheng, Qiuhong; Zhang, Yimeng; Luan, Tianxiang; Wang, Zhuoer; Tang, Ruipeng; Xing, Pengyao; Hao, Aiyou
作者机构:[Cheng, Qiuhong; Zhang, Yimeng; Luan, Tianxiang; Wang, Zhuoer; Tang, Ruipeng; Xing, Pengyao; Hao, Aiyou] Shandong Univ, Key Lab Colloid & Interface Ch 更多
通讯作者:Hao, AY
通讯作者地址:[Hao, AY]Shandong Univ, Key Lab Colloid & Interface Chem, Minist Educ, Sch Chem & Chem Engn, Jinan 250100, Shandong, Peoples R China.
来源:CHEMPLUSCHEM
出版年:2019
卷:84
期:4
页码:328-332
DOI:10.1002/cplu.201900042
关键词:azobenzene derivatives; isomerization; -conjugated systems;; photoresponsive materials; supramolecular hydrogels
摘要:Azobenzene and its derivatives are widely used as photoresponsive units for the fabrication of photoresponsive smart materials. In this work, two azobenzene derivatives were designed and investigated as hydrogelators, namely N-4-azodiphenyl-maleimic acid (ADPMA) and N-4-azodiphenyl-succinic acid (ADPSA) bearing azobenzene and carboxylic acid segments. In the process of deprotonation/protonation of the carboxylic acids by pH variation, the self-assembly of these two gelators was triggered. ADPMA could transform from solution to hydrogel while the solution of ADPSA formed a precipitate under the same conditions. The solution-gel/precipitate transformation can be repeated by changing the pH. In contrast to the conventional responsiveness to UV-light irradiation for azobenzene-based gels, the ADPMA hydrogel shows typical trans-cis isomerization of the azobenzene unit in solution, yet the hydrogel demonstrates remarkable stability to UV light irradiation in both the bulk gel and thin film states.
收录类别:SCOPUS;SCIE
资源类型:期刊论文
原文链接:https://www.scopus.com/inward/record.uri?eid=2-s2.0-85062795785&doi=10.1002%2fcplu.201900042&partnerID=40&md5=d65bab80b33be1a52c9709cc51238857
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