One-pot asymmetric living copolymerization-induced chiral self-assemblies and circularly polarized luminescence

作者：Gao, Run-Tan; Li, Shi-Yi; Liu, Bing-Hao; Chen, Zheng; Liu, Na^*; Zhou, Li; Wu, Zong-Quan^*

来源：Chemical Science, 2024, 15(8): 2946-2953.

DOI：10.1039/d3sc06242b

• HELICAL ASSEMBLIES
• POLYMERIZATION
• POLYMERS
• COMPLEXES

Controlled synthesis of conjugated block polymers enables the optimization of their self-assembly and may lead to distinct optical properties and functionalities. Herein, we report a direct chain extension of one-handed helical poly(acyl methane) with 1-ethynyl-4-iodo-2,5-bis(octyloxy)benzene, affording well-defined pi-conjugated poly(acyl methane)-b-poly(phenylene ethynylene) copolymers. Although the distinct monomers are polymerized via different mechanisms, the one-pot copolymerization follows a living polymerization manner, giving the desired optically active block copolymers with controllable molar mass and low distribution. The block copolymerization induced chiral self-assembly simultaneously due to the one-handed helicity of the poly(acyl methane) block, giving spherical nanoparticles, one-handed helices, and chiral micelles with controlled dimensions regarding the composition of the generated copolymers. Interestingly, the chiral assemblies exhibit clear circularly polarized luminescence with tunable handedness and a high dissymmetric factor. @@@ Well-defined block copolymers containing helical poly(acyl methane) and pi-conjugated poly(phenylene ethynylene)s were facilely prepared, which self-assembly into chiral supramolecular architectures with circularly polarized luminescence.

• 单位
  吉林大学