A novel supramolecular miktoarm star polymer was successfully constructed in water from a pyridine end-decorated polymer (Py-PmDEGA) and a metalloporphyrin based star polymer (ZnTPP-(PEG)₄) via metal–ligand coordination. The Py-PmDEGA moiety was prepared via a combination of reversible addition–fragmentation chain transfer polymerization (RAFT) and subsequent aminolysis and Michael addition reactions to introduce the pyridine end-group. The ZnTPP(PEG)₄ star-polymer was synthesized by the reaction between tetrakis(p-hydroxyphenyl)porphyrin and toluenesulfonyl-PEG, followed by insertion of a zinc ion into the porphyrin core. The formation of a well-defined supramolecular AB₄-type miktoarm star polymer was unambiguously demonstrated via UV-Vis spectroscopic titration, isothermal titration calorimetry (ITC) and diffusion ordered NMR spectroscopy (DOSY).

中文翻译：

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基于卟啉金属络合的超分子超分子星形聚合物

通过金属配体配位，由吡啶末端修饰的聚合物（Py-PmDEGA）和金属卟啉基的星形聚合物（ZnTPP-（PEG）₄）在水中成功构建了一种新型的超分子拟臂星形聚合物。Py-PmDEGA部分是通过可逆加成-断裂链转移聚合（RAFT）以及随后的氨解和迈克尔加成反应以引入吡啶端基的组合而制备的。通过四（对-羟基苯基）卟啉与甲苯磺酰基-PEG之间的反应，然后将锌离子插入卟啉核中，合成了ZnTPP（PEG）₄星型聚合物。定义明确的超分子AB _4的形成通过UV-Vis光谱滴定，等温滴定量热法（ITC）和扩散有序NMR光谱法（DOSY）明确证明了这种类型的miktoarm星状聚合物。