Fluorescent Dendritic Organogels Based on 2-(2′-Hydroxyphenyl)benzoxazole: Emission Enhancement and Multiple Stimuli-Responsive Properties

被引：63

作者：

Chen, Hui ^{[1
,2
,3
]}

Feng, Yu ^{[2
]}

Deng, Guo-Jun ^{[1
,3
]}

Liu, Zhi-Xiong ^{[2
,3
]}

He, Yan-Mei ^{[2
,3
]}

Fan, Qing-Hua ^{[2
,3
]}

机构：

[1] Xiangtan Univ, Key Lab Environm Friendly Chem & Applicat, Minist Educ, Coll Chem, Xiangtan 411105, Peoples R China

[2] Chinese Acad Sci, Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China

[3] Chinese Acad Sci, CAS Key Lab Mol Recognit & Funct, Inst Chem, Beijing 100190, Peoples R China

来源：

CHEMISTRY-A EUROPEAN JOURNAL | 2015年 / 21卷 / 31期

基金：

中国国家自然科学基金;

关键词：

aggregation; dendrimers; fluorescence; multiresponsiveness; sol-gel processes; supramolecular chemistry; INTRAMOLECULAR PROTON-TRANSFER; POLY(BENZYL ETHER) DENDRONS; SUPRAMOLECULAR GELS; TRANSFER ESIPT; HIGHLY EFFICIENT; GELATION; MULTISTIMULI; GELATORS; TRANSITION; DESIGN;

D O I：

10.1002/chem.201500849

中图分类号：

O6 [化学];

学科分类号：

0703 ;

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 and synthesized. HPB-G(1) can form stable organogels toward various apolar and polar organic solvents. Further studies revealed that intermolecular multiple pi-pi stacking interactions are the main driving forces for the formation of the organogels. Notably, dendron HPB-G(1) exhibited a significantly enhanced emission in the gel state in contrast to weak emission in solution. Most interestingly, these dendritic organogels exhibited multiple stimuli-responsive behaviors upon exposure to environmental stimuli, including temperature, sonication, shear stress, and the presence of anions, metal cations, acids/ bases, thus leading to reversible sol-gel phase transitions.

引用

页码：11018 / 11028

页数：11

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