Light‐driven and aggregation‐induced emission from side‐chain azoindazole polymers
作者:Ying Li、Nianchen Zhou、Wei Zhang、Feng Zhang、Jian Zhu、Zhengbiao Zhang、Zhenping Cheng、Yingfeng Tu、Xiulin Zhu
DOI:10.1002/pola.24947
日期:2011.11.15
henylazo]‐indazole}‐hexyl methacrylate)‐b‐poly(2‐(dimethylamino)ethylmethacrylate) (PDHMAm‐b‐PDMAEMAn), were successfully prepared via reversible addition‐fragmentation chain transfer polymerization technique. The homopolymer and amphiphilic diblock copolymer in CH2Cl2 exhibited intense fluorescence emission accompanied by trans–cis photoisomerization of azoindazole group under UV irradiation. The
定义明确的含偶氮吲唑的均聚物,聚(6- 6-[[(4-二甲基氨基)苯基偶氮]-吲唑}-甲基丙烯酸己酯)(PDHMA)和两亲二嵌段共聚物,聚(6- [6- [4通过可逆加成-断裂链转移聚合技术成功制备了-二甲基氨基)苯基偶氮]-吲唑}-甲基丙烯酸己酯)-b-聚(2-(二甲基氨基)乙基甲基丙烯酸酯)(PDHMA m - b- PDMAEMA n)。CH 2 Cl 2中的均聚物和两亲性二嵌段共聚物表现出强烈的荧光发射,并在紫外线照射下偶氮吲唑基团进行反式-顺式光异构化。实验结果表明,强烈的荧光发射可能是由于抑制了顺式偶氮吲唑的光诱导电子转移。另一方面,在水-四氢呋喃混合物中观察到两亲性二嵌段共聚物的强烈荧光发射,并随着混合溶剂中水的体积比增加而增加。通过透射电子显微镜,激光散射和UV-vis光谱检查了三种两亲性二嵌段共聚物的自聚集行为。聚集体中偶氮吲唑基团分子内旋转的限制被认为是聚集体诱导的荧光发射的主要原因。©2011