Chemical Research in Chinese Universities ›› 2024, Vol. 40 ›› Issue (5): 842-848.doi: 10.1007/s40242-024-3287-2

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Stereo-control on Lanthanide Triple-stranded Helicates Toward Enhanced Enantioselective Sensing

GUO Xiaoqing1, ZHANG Xinyuan1,2, HU Shaojun1, ZHOU Lipeng1, SUN Qingfu1,2   

  1. 1. State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, P. R. China;
    2. University of Chinese Academy of Sciences, Beijing 100049, P. R. China
  • Received:2023-12-29 Online:2024-10-01 Published:2024-09-26
  • Contact: GUO Xiaoqing,guoxiaoqing@fjirsm.ac.cn E-mail:guoxiaoqing@fjirsm.ac.cn
  • Supported by:
    This work was supported by the National Key Research and Development Program of China (Nos.2021YFA1500400 and 2022YFA1503300) and the National Natural Science Foundation of China (Nos.22201285,21825107,and 22171264).

Abstract: Chiral metal-organic cages (MOCs) serve as a representative model for enzyme simulation, offering a robust platform for reproducing and expanding enzyme functions at the molecular level. In this study, we present a family of lanthanide triple-stranded helicates with finely-tuned stereoconfigurations, self-assembled from ligands featuring both point and axial chiral centers. Circular dichroism (CD) and circularly polarized luminescence (CPL) spectroscopy demonstrated that peripheral point chirality induces the stereoconfiguration (Δ/Λ) of the metal center, while bridging axial chirality defines the cavity chiral microenvironment, resulting in the formation of both homochiral and mesomeric helicates. In comparison to mesocate, the homochiral helicates exhibited heightened enantioselectivity in the luminescent detection of D/L-leucinol.

Key words: Metal-organic cage, Stereocontrolled self-assembly, Lanthanide helicate, Chiral sensing