Practical Enantioselective Synthesis of Chiroptical Polymers of Intrinsic Microporosity with Circular Polarized Luminescence
Xinbo Wang, Hao Guo, Cong Yu, Yuanju Jing, Zhaobin Han, Xiaohua Ma, Chenchen Yang, Minghua Liu, Dong Zhai, Daoyuan Zheng, Yupeng Pan, Xiaoju Li, Kuiling Ding
Abstract
Polymers with intrinsic microporosity (PIMs) have recently received increasing interest in the fields of gas separation, sensors, catalysts, and so on, due to their high microporosity and good solution processability. However, PIMs with chiral backbones are quite limited, which undoubtedly hinders their applications in many areas such as chiral separation and optoelectronics. Herein, the catalytic enantioselective synthesis of a novel cyclohexyl-fused spirobiindane-based chiral PIM is described. This novel polymer exhibits high intrinsic microporosity (SBET = 796 m2 g–1), solubility, and good film formability. Its macroscopic chirality of the twist-bend structure was confirmed by circular dichroism. More interestingly, circular polarized luminescence (CPL) was observed for the first time in PIMs; also, to our best knowledge, this is the first nonconjugated porous CPL polymer, opening the door to explore new research fields of PIM materials, as well as providing new guidance for CPL polymer design.