UV Light and Temperature Responsive Supramolecular ABA Triblock Copolymers via Reversible Cyclodextrin Complexation
UV Light and Temperature Responsive Supramolecular ABA Triblock Copolymers via Reversible Cyclodextrin Complexation
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DOI：
10.1021/ma302386w
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发表时间：
2013-02
期刊：
影响因子：
5.5
通讯作者：
B. V. Schmidt;M. Hetzer;H. Ritter;C. Barner‐Kowollik
中科院分区：
文献类型：
--
作者：
B. V. Schmidt;M. Hetzer;H. Ritter;C. Barner‐Kowollik
提出了一种基于环糊精（CD）络合的三嵌段大分子结构。一种CD功能化的生物相容性聚（N-（2-羟丙基）甲基丙烯酰胺）（PHPMA）结构单元（3800 ≤ Mn ≤ 10 600 g mol-1; 1.29 ≤ Mn ≤ 1.46）和双客体聚合物N，N-二甲基丙烯酰胺（6400 ≤ Mn ≤ 15 700 g mol-1; 1.06 ≤ Mn ≤ 1.15）和聚N，N-二乙基丙烯酰胺（5400 ≤ Mn ≤ 12 100 g mol-1;通过可逆加成-断裂链转移（RAFT）制备了1.11 ≤ 1.33）链段聚合，随后用于形成明确定义的超分子阿坝三嵌段共聚物。通过动态光散射（DLS），核奥弗豪泽效应光谱（NOESY），和浊度测量证明了块的形成。此外，块的连接被证明是温度响应性的，并且在偶氮苯客体的情况下，响应于用UV光的照射。这些刺激的应用导致拆卸的树…
A novel triblock macromolecular architecture based on cyclodextrin (CD) complexation is presented. A CD-functionalized biocompatible poly(N-(2-hydroxypropyl)methacrylamide) (PHPMA) building block (3800 ≤ Mn ≤ 10 600 g mol–1; 1.29 ≤ ĐM ≤ 1.46) and doubly guest-containing poly(N,N-dimethylacrylamide) (PDMAAm) (6400 ≤ Mn ≤ 15 700 g mol–1; 1.06 ≤ ĐM ≤ 1.15) and poly(N,N-diethylacrylamide) (PDEAAm) (5400 ≤ Mn ≤ 12 100 g mol–1; 1.11 ≤ ĐM ≤ 1.33) segments were prepared via reversible addition–fragmentation chain transfer (RAFT) polymerization and subsequently utilized for the formation of a well-defined supramolecular ABA triblock copolymer. The block formation was evidenced via dynamic light scattering (DLS), nuclear Overhauser effect spectroscopy (NOESY), and turbidity measurements. Furthermore, the connection of the blocks was proven to be temperature responsive and—in the case of azobenzene guests—responsive to the irradiation with UV light. The application of these stimuli leads to the disassembly of the tr...