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<p>Advanced chiral optical materials exhibiting circularly polarized room-temperature phosphorescence (CPRTP) possess significant research value. This study facilitates the synthesis of chiral metal-organic frameworks (CMOFs) with good CPRTP performance by implementing a dual-ligand strategy. By self-assembling the luminescent ligand H<sub>2</sub>BIIM with the chiral ligands L- or D-H<sub>2</sub>IDPA in the presence of Zn(II) ions, two robust three-dimensional (3D) CMOFs were successfully constructed. These complexes demonstrated intense fluorescence and exhibited prolonged yellow room-temperature phosphorescence (RTP) with a duration of up to 6 s. Notably, they exhibited both circularly polarized fluorescence (<i>g</i><sub>lum</sub> = ±7.57 × 10<sup>−3</sup>) and CPRTP (<i>g</i><sub>lum</sub> = ±2.68 × 10<sup>−3</sup>). These unique properties were effectively utilized in the creation of multi-color anti-counterfeiting patterns, underscoring their promising potential for a wide range of applications.</p>

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Dual-ligand chiral MOFs exhibiting circularly polarized room temperature phosphorescence for anti-counterfeiting

  • 期刊论文

  • 发表日期：

    2025年1月3日

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  • Hongrui Zheng,
  • Qingqing Wang,
  • Xinchao Wang,
  • Fei Wang,
  • Shangda Li,
  • Jian Zhang

摘要

Advanced chiral optical materials exhibiting circularly polarized room-temperature phosphorescence (CPRTP) possess significant research value. This study facilitates the synthesis of chiral metal-organic frameworks (CMOFs) with good CPRTP performance by implementing a dual-ligand strategy. By self-assembling the luminescent ligand H2BIIM with the chiral ligands L- or D-H2IDPA in the presence of Zn(II) ions, two robust three-dimensional (3D) CMOFs were successfully constructed. These complexes demonstrated intense fluorescence and exhibited prolonged yellow room-temperature phosphorescence (RTP) with a duration of up to 6 s. Notably, they exhibited both circularly polarized fluorescence (glum = ±7.57 × 10−3) and CPRTP (glum = ±2.68 × 10−3). These unique properties were effectively utilized in the creation of multi-color anti-counterfeiting patterns, underscoring their promising potential for a wide range of applications.