发光
十二面体
咪唑酯
沸石咪唑盐骨架
材料科学
对映体药物
荧光
纳米材料
量子产额
圆极化
纳米晶
纳米颗粒
对映选择合成
光化学
化学
纳米技术
金属有机骨架
结晶学
光电子学
有机化学
光学
物理
微带线
吸附
催化作用
作者
Tonghan Zhao,Jianlei Han,Xue Jin,Yan Liu,Minghua Liu,Pengfei Duan
标识
DOI:10.1002/anie.201900052
摘要
A chiral zeolitic imidazolate framework (ZIF) showing circularly polarized luminescence (CPL) has been successfully constructed by blending binapthyl-derived chiral emitters with ZIF-8 rhombic dodecahedron nanoparticles. This approach solves a major trade-off in CPL-active materials: the large luminescence dissymmetry factor (glum ) always suffers from suppression of luminescence efficiency. Compared to the optical properties of chiral emitters, the obtained chiral ZIF nanomaterials showed an enhanced fluorescence efficiency while the |glum | value is significantly amplified by one order of magnitude. Additionally, enantioselective fluorescence sensing in response to α-hydroxycarboxylic acids has been enhanced in chiral ZIFs. Reorganization and conjunction of chiral emitters to the skeleton of ZIF nanoparticles can greatly improve both the luminescence quantum yield and circularly polarization, which facilitates the design of more efficient chiroptical materials.
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