Syntheses and Controllable Self-Assembly of Luminescence Platinum(II) Plane-Coil Diblock Copolymers
Syntheses and Controllable Self-Assembly of Luminescence Platinum(II) Plane-Coil Diblock Copolymers
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发光铂(II)平面线圈二嵌段共聚物的合成与可控自组装
DOI：
10.1021/acs.macromol.7b00171
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发表时间：
2017
期刊：
影响因子：
5.5
通讯作者：
Bu Weifeng
中科院分区：
文献类型：
--
作者：
Liu Nijuan;Wang Yongyue;Wang Chen;He Qun;Bu Weifeng
聚苯乙烯已被合成的发光方形平面铂（II）配合物，这可以被视为概念上的平面线圈二嵌段共聚物的端基。它们可以自组装成球形胶束的核心聚苯乙烯和冠的平面铂（II）配合物在氯仿/甲醇混合溶剂中，而独立的双层片形成在甲苯/甲醇混合溶剂。在后一种情况下，随着甲醇含量的增加，其中聚苯乙烯嵌段的溶剂质量高度恶化，片状纳米结构很容易转化为球形胶束。Pt···Pt和/或平面铂（II）块之间的π-π堆积相互作用对这些聚集体形态及其演变做出了显着贡献，导致显着的发光增强。这项工作代表了一种新的方法来设计和合成发光的铂（II）平面线圈二嵌段共聚物，其中的平面铂（II）配合物是第一次被视为一个单独的块，用于创建嵌段共聚物和胶束状聚集体在溶液中。
Polystyrenes have been synthesized with terminal groups of luminescence square-planar platinum(II) complexes, which can be conceptually regarded as plane–coil diblock copolymers. They can self-assemble into spherical micelles with a core of polystyrenes and a corona of planar platinum(II) complexes in the chloroform/methanol mixture solvents, while free-standing bilayered sheets form in the toluene/methanol mixture solvents. With increasing methanol content in the latter case, where the solvent quality was highly deteriorated for polystyrene blocks, the sheetlike nanostructures are readily transformed into spherical micelles. Pt···Pt and/or π–π stacking interactions between the planar platinum(II) blocks contributed significantly to these aggregate morphologies and their evolutions, leading to remarkable luminescence enhancements. This work represents a novel approach to design and synthesize luminescence platinum(II) plane–coil diblock copolymers, in which the planar platinum(II) complexes are for the first time regarded as an individual block for the creation of block copolymers and micellelike aggregates in solution.