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83. Gelation and Fluorescent Organogels of a Complex of Perylenetetracarboxylic Tetraacid with Cationic Surfactants
作者:Xiangyu Ren, Wei Yu, Zijian Zhang, Nan Xia, Guihua Fu, Xiuping Lua, Wei Wang,
关键字:Organogels; Fluorescence; Perylene; π–π stacking
论文来源:期刊
具体来源:Colloids and Surfaces A: Physicochemical and Engineering Aspects
发表时间:2011年

In the work we report the formation of fluorescent organogels in toluene of a complex of perylenetetracarboxylic tetraacid (PTCTA) with four cationic surfactants. We found that the gel formation is a function of the gelation temperature and solution concentration. The TEM characterization indicates twisted- or straight-belt aggregates formed in gel-phase or in crystals. The further XRD characterization illustrated a layered structure of complex molecules in these aggregates, mainly driven by π–π stacking of the rigid perylene cores. The UV/vis and fluorescence spectra show the H-type aggregates in the gel-phase. The changes of the aggregate morphology and molecular packing structures with the gelation temperature and solution concentration reflect a competition between gelation and crystallization under the conditions used and the details are discussed in text.