Fluorescent Dendritic Organogels Based on 2-(2′-Hydroxyphenyl)benzoxazole: Emission Enhancement and Multiple Stimuli-Responsive Properties
作者： Hui Chen , Yu Feng , Guo-Jun Deng , Zhi-Xiong Liu , Yan-Mei He
关键词: Supramolecular chemistry 、 Chemistry 、 Dendrimer 、 Photochemistry 、 Organic chemistry 、 Benzoxazole 、 Stacking 、 Fluorescence 、 Metal 、 Intermolecular force 、 Sonication
摘要: A new highly efficient and versatile poly(benzyl ether) dendritic organogelator HPB-G(1) with 2-(2'-hydroxyphenyl) benzoxazole (HPB) at the focal point has been designed synthesized. can form stable organogels toward various apolar polar organic solvents. Further studies revealed that intermolecular multiple pi-pi stacking interactions are main driving forces for formation of organogels. Notably, dendron exhibited a significantly enhanced emission in gel state contrast to weak solution. Most interestingly, these stimuli-responsive behaviors upon exposure environmental stimuli, including temperature, sonication, shear stress, presence anions, metal cations, acids/ bases, thus leading reversible sol-gel phase transitions.
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