pH and thermo responsive aliphatic tertiary amine chromophore hyperbranched poly(amino ether ester)s from oxa‐Michael addition polymerization,Journal of Polymer Science

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pH and thermo responsive aliphatic tertiary amine chromophore hyperbranched poly(amino ether ester)s from oxa‐Michael addition polymerization
Journal of Polymer Science ( IF 3.9 ) Pub Date : 2020-08-19 , DOI: 10.1002/pol.20200432
Qimin Jiang ₁ , Yongzhuang Du ₁ , YuanLiang Zhang ₁ , Liang Zhao ₁ , Li Jiang ₁ , Wenyan Huang ₁ , Hongjun Yang ₁ , Xiaoqiang Xue ₁ , Bibiao Jiang _{1,

2}

Affiliation

In this research, we developed a novel and facile strategy to prepare aliphatic tertiary amine chromophore hyperbranched poly(amino ether ester)s with pH and thermo responsiveness via phosphazene base (t‐BuP₂) catalyzed oxa‐Michael addition polymerization of triethanolamine with ethylene glycol diacrylate at room temperature. UV–vis and fluorescence analyses results showed that the tertiary amine at branching point for hyperbranched poly(amino ether ester)s is very important to retain strong blue fluorescence of tertiary amine chromophore. Moreover, the hyperbranched poly(amino ether ester)s exhibit an aggregation caused quenching (ACQ) fluorescence, solvent induced red‐shifted emission, molecular weight, and temperature dependent emission characters. More interestingly, the hyperbranched poly(amino ether ester)s show extreme acid induced quenching fluorescence phenomenon, and also display good water solubility, specific recognition of Fe³⁺ ion, low cytotoxicity, and bright cell imaging, which could serve as a microenvironment‐responding fluorescent probe for application in chemical sensing, cell imaging, drug delivery, or disease diagnostics. This research provides a versatile method for the preparation of stimuli‐responsive aliphatic tertiary amine chromophore polymers, and supplies ideas for researchers to explore other unconventional fluorescent polymers for application.

中文翻译：

oxa-Michael加成聚合反应的pH和热响应性脂族叔胺发色团超支化聚（氨基醚酯）s

在这项研究中，我们开发了一种新颖且简便的策略，可通过磷腈碱（t ‐BuP ₂）制备具有pH和热响应性的脂族叔胺发色团超支化聚（氨基醚酯）。）在室温下催化三乙醇胺与乙二醇二丙烯酸酯的氧杂迈克尔加成聚合。紫外可见和荧光分析结果表明，在支化点上的叔胺对于超支化聚氨基醚酯来说，对于保留叔胺发色团的强烈蓝色荧光非常重要。此外，超支化聚氨基醚酯具有聚集引起的猝灭（ACQ）荧光，溶剂引起的红移发射，分子量和温度相关的发射特性。更有趣的是，超支化的聚（氨基醚酯）具有极端的酸诱导的猝灭荧光现象，并且还具有良好的水溶性，对Fe ^3+的特异性识别离子，低细胞毒性和亮细胞成像，可以用作微环境响应荧光探针，用于化学传感，细胞成像，药物递送或疾病诊断。这项研究为制备刺激响应性脂族叔胺发色聚合物提供了一种通用方法，并为研究人员探索其他非常规荧光聚合物的应用提供了思路。

更新日期：2020-10-02

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