Bottlebrush Polymers Carrying Side Chains on Every Backbone Atom: Controlled Synthesis, Polymerization-Induced Emission, and Circularly Polarized Luminescence
Bottlebrush Polymers Carrying Side Chains on Every Backbone Atom: Controlled Synthesis, Polymerization-Induced Emission, and Circularly Polarized Luminescence
复制标题
每个主链原子上都带有侧链的洗瓶刷聚合物：受控合成、聚合诱导发射和圆偏振发光
DOI：
10.1021/acs.macromol.1c00016
复制
发表时间：
2021-03-30
期刊：
影响因子：
5.5
通讯作者：
Wu, Zong-Quan
中科院分区：
文献类型：
--
作者：
Liu, Wen-Bin;Xu, Xun-Hui;Wu, Zong-Quan
Controlled synthesis of bottlebrush polymers with high grafting density and carrying polymeric side chains on every backbone atom remains a great challenge. In this work, a series of well-defined poly(L-lactic acid) (PLLA) and poly(D-lactic acid) (PDLA) bearing polymerizable phenyl isocyanide on chain ends were prepared. Polymerization of the terminal phenyl isocyanide of these macromonomers by an alkyne-palladium(II) catalyst yielded bottlebrush polymers carrying PLLA or PDLA side chains on every backbone atom. The grafted side chains were directly packed together without separating from other atoms. The polymerizations were proceeded in a living/controlled manner, and the degree of polymerization could be up to 250. The chiral macromonomers induced an asymmetric polymerization and resulted in a poly(phenyl isocyanide) backbone with a preferred one-handed helix and large optical activity. Remarkably, the densely grafted bottlebrush polymers exhibited intriguing photoluminescence, although the macromonomers and poly(phenyl isocyanide) backbone were all nonluminescent. Moreover, the preferred one-handed helix of the backbone induced clear circularly polarized luminescence (CPL) with defined handedness and a tunable dissymmetric factor.
