Ru Yi, Sui Laizhi, Song Haoqiang, Liu Xingjiang, Tang Zhiyong, Zang Shuang-Quan, Yang Bai, Lu Siyu
Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou, 450000, China.
State Key Lab of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China.
Angew Chem Int Ed Engl. 2021 Jun 14;60(25):14091-14099. doi: 10.1002/anie.202103336. Epub 2021 May 10.
Light-emitting chiral carbonized polymer dots (Ch-CPDs) are attracting great interest because of their extraordinary photonic properties, but modulating their band-gap emission, especially at long wavelength, and maintaining their chiral structure to achieve multicolor, high-emission Ch-CPDs remains challenging. Reported here for the first time is the synthesis of red- and multicolor-emitting Ch-CPDs using the common precursors L-/D-tryptophan and o-phenylenediamine, and a solvothermal approach at one temperature. The quantum yield of the Ch-CPDs was between 31 % and 54 %. Supramolecular self-assembly provided multicolor-emitting Ch-CPDs showing novel circularly polarized luminescence, with the highest dissymmetric factor (g ) of 1×10 . Importantly, circularly polarized white-emitting CPDs were fabricated for the first time by tuning the mixing ratio of the three colored Ch-CPDs in a gel. This strategy affords exciting opportunities for designing functional chiroptical materials.
发光手性碳化聚合物点（Ch-CPDs）因其非凡的光子特性而备受关注，但调节其带隙发射，尤其是长波长发射，并保持其手性结构以实现多色、高发射的Ch-CPDs仍然具有挑战性。本文首次报道了使用常见前体L-/D-色氨酸和邻苯二胺，通过溶剂热法在一个温度下合成红色和多色发射的Ch-CPDs。Ch-CPDs的量子产率在31%至54%之间。超分子自组装提供了显示新型圆偏振发光的多色发射Ch-CPDs，最高不对称因子（g）为1×10 。重要的是，通过调节凝胶中三种颜色的Ch-CPDs的混合比例，首次制备了圆偏振白色发光CPDs。这种策略为设计功能性手性光学材料提供了令人兴奋的机会。
