文献类型：期刊文献

英文题名：Solvent-dependent self-assembly and morphological transition of low-molecular-weight azobenzene organogel

作者：Zhang, Zhiwei[1,2];Zhang, Shaoze[1];Zhang, Junji[1,2];Zhu, Liangliang[3];Qu, Dahui[1,2]

机构：[1]East China Univ Sci & Technol, Sch Chem & Mol Engn, Key Lab Adv Mat, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Chem & Mol Engn, Inst Fine Chem, Shanghai 200237, Peoples R China;[3]Fudan Univ, Dept Macromol Sci, State Key Lab Mol Engn Polymers, Shanghai 200433, Peoples R China

年份：2017

卷号：73

期号：33

起止页码：4891

外文期刊名：TETRAHEDRON

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000407524400010)】；

基金：This research is supported by the National Natural Science Foundation of China (21402050, 21420102004), the Programme of Introducing Talents of Discipline to Universities (B16017).

语种：英文

外文关键词：Low-molecular-weight organogel; Solvent-dependent; Morphological transition; Azobenzene

摘要：A novel low molecular weight organogelator (LMOG) containing an azobenzene group has been designed and synthesized. Stable gels could be formed in various organic solvents. UV Vis spectroscopy indicated that the sol-gel transition of the organogels could be reversibly tuned by UV/visible light irradiations. Importantly, scanning electron microscopy (SEM) revealed that the characteristic gelation morphologies would vary from solvents of different polarities. FT-IR, XRD and rheological measurements demonstrated that the different nanostructures in polar and non-polar solvents might result from the differences in the intermolecular hydrogen bonding, pi-pi stacking driving forces as well as the different stacking models for the formation of the gels. Moreover, as an efficient phase-selective gelator, this photo-switchable gel could perform as an efficient absorbent and water cleaner to remove pollutants (e.g. rhodamine B). (C) 2017 Elsevier Ltd. All rights reserved.