作者:Krishnamurthy Rameshbabu、Lu Zou、Chanjoong Kim、Augustine Urbas、Quan Li
DOI:10.1039/c1jm13342j
日期:——
A series of photochromic organogelators based on dithienylcyclopentene amides with a phenylene unit as a bridge between the amide and long alkyl chain were synthesized, their gelation behaviors were characterized by rheology, FT-IR, 1H NMR, SEM, optical microscopy, UV-Vis and fluorescence spectroscopy. These organogelator molecules were found to be able to induce gelation in apolar solvents such as benzene, toluene and p-xylene to form entangled networks driven by intermolecular hydrogen bonding together with π–π interactions. Their excellent reversible photochromism with thermal stability in both solution and gel states was observed, and the thermally reversible property in sol–gel transition was exhibited.
一系列基于二噻吩环戊烯酰胺的光变色有机凝胶剂被合成,这些有机凝胶剂在酰胺与长烷基链之间以苯基单元作为桥接。通过流变学、傅里叶变换红外光谱(FT-IR)、1H核磁共振(1H NMR)、扫描电子显微镜(SEM)、光学显微镜、紫外-可见光谱(UV-Vis)和荧光光谱对其凝胶行为进行了表征。结果发现,这些有机凝胶剂分子能够在苯、甲苯和对二甲苯等非极性溶剂中诱导凝胶形成,形成由分子间氢键和π–π相互作用驱动的缠结网络。观察到其在溶液和凝胶状态下均表现出优异的可逆光变色特性及热稳定性,并展示了在溶胶-凝胶转变中的热可逆特性。