Multiple-stimuli fluorescent responsive metallo-organic helicated cage arising from monomer and excimer emission

Zhe Zhang, Qixia Bai, Zirui Zhai, Qingwu Long, Ermeng Han, He Zhao, Chuang-Wei Zhou, Haobo Lin, Wei Zhang, Guo-Hong Ning, Ting-Zheng Xie, Pingshan Wang () and Tun Wu ()
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Zhe Zhang: Guangzhou University
Qixia Bai: Guangzhou University
Zirui Zhai: Guangzhou University
Qingwu Long: Shunde Polytechnic
Ermeng Han: Central South University
He Zhao: Central South University
Chuang-Wei Zhou: Jinan University
Haobo Lin: Guangzhou University
Wei Zhang: Guangzhou University
Guo-Hong Ning: Jinan University
Ting-Zheng Xie: Guangzhou University
Pingshan Wang: Guangzhou University
Tun Wu: Guangzhou University

Nature Communications, 2024, vol. 15, issue 1, 1-8

Abstract: Abstract Effectively regulating monomer and excimer emission in a singular supramolecular luminous platform is challenging due to high difficulty of precise control over its aggregation and dispersion behavior when subjected to external stimuli. Here, we show a metallo-cage (MTH) featuring a triple helical motif that displays a unique dual emission. It arises from both intramolecular monomer and intermolecular excimer, respectively. The distorted molecular conformation and the staggered stacking mode of MTH excimer are verified through single crystal X-ray diffraction analysis. These structural features facilitate the switch between monomer and excimer emission, which are induced by changes in concentration and temperature. Significantly, adjusting the equilibrium between these two states in MTH enables the production of vibrant white light emission in both solution and solid state. Moreover, when combined with a PMMA (polymethyl methacrylate) substrate, the resulting thin films can serve as straightforward fluorescence thermometer and thermally activated information encryption materials.

Date: 2024
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DOI: 10.1038/s41467-024-51792-x

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