中国物理B ›› 2023, Vol. 32 ›› Issue (5): 54208-054208.doi: 10.1088/1674-1056/ac81aa

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Molecular fluorescence significantly enhanced by gold nanoparticles@zeolitic imidazolate framework-8

Yuyi Zhang(张钰伊)1, Yajie Bian(卞亚杰)1, Wei Zhang(张炜)1, Yiting Liu(刘易婷)1, Xiaolei Zhang(张晓磊)1,2,†, Mengdi Chen(陈梦迪)1,‡, Bingwen Hu(胡炳文)1, and Qingyuan Jin(金庆原)1,3,§   

  1. 1 State Key Laboratory of Precision Spectroscopy, Shanghai Key Laboratory of Magnetic Resonance, School of Physics and Electronic Science, East China Normal University, Shanghai 200241, China;
    2 Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006, China;
    3 Department of Optical Science and Engineering, Fudan University, Shanghai 200433, China
  • 收稿日期:2022-05-28 修回日期:2022-07-14 接受日期:2022-07-18 出版日期:2023-04-21 发布日期:2023-05-09
  • 通讯作者: Xiaolei Zhang, Mengdi Chen, Qingyuan Jin E-mail:xlzhang@admin.ecnu.edu.cn;mdchen@lps.ecnu.edu.cn;qyjin@fudan.edu.cn

Molecular fluorescence significantly enhanced by gold nanoparticles@zeolitic imidazolate framework-8

Yuyi Zhang(张钰伊)1, Yajie Bian(卞亚杰)1, Wei Zhang(张炜)1, Yiting Liu(刘易婷)1, Xiaolei Zhang(张晓磊)1,2,†, Mengdi Chen(陈梦迪)1,‡, Bingwen Hu(胡炳文)1, and Qingyuan Jin(金庆原)1,3,§   

  1. 1 State Key Laboratory of Precision Spectroscopy, Shanghai Key Laboratory of Magnetic Resonance, School of Physics and Electronic Science, East China Normal University, Shanghai 200241, China;
    2 Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006, China;
    3 Department of Optical Science and Engineering, Fudan University, Shanghai 200433, China
  • Received:2022-05-28 Revised:2022-07-14 Accepted:2022-07-18 Online:2023-04-21 Published:2023-05-09
  • Contact: Xiaolei Zhang, Mengdi Chen, Qingyuan Jin E-mail:xlzhang@admin.ecnu.edu.cn;mdchen@lps.ecnu.edu.cn;qyjin@fudan.edu.cn

摘要: Noble metal nanoparticles exhibit unique surface plasmon resonance dependent optical properties. On this basis, gold nanoparticles (AuNPs) encapsulated in metal-organic frameworks (MOFs) can form AuNPs@MOFs composites to modulate the optical properties of fluorescent molecules, which is less reported. In this paper, based on the fluorescence enhancement effect of AuNPs on 2-(2-hydroxyphenyl)-1H-benzimidazole (HPBI) molecules, zeolitic imidazolate framework-8 (ZIF-8) crystals with structural stability were introduced. AuNPs@ZIF-8 exhibited a significantly pronounced fluorescence enhancement of the HPBI molecules. In addition, by comparing the fluorescence characteristics of the HPBI molecules adsorbed on AuNPs@ZIF-8 and those captured in AuNPs@ZIF-8, we found that the ZIF-8 can act as a spacer layer with highly effective near-field enhancement. All our preliminary results shed light on future research on the composite structures of noble metal particles and MOFs for fluorescent probes and sensing applications.

关键词: ZIF-8, gold nanoparticles, fluorescence spectra, fluorescence lifetime

Abstract: Noble metal nanoparticles exhibit unique surface plasmon resonance dependent optical properties. On this basis, gold nanoparticles (AuNPs) encapsulated in metal-organic frameworks (MOFs) can form AuNPs@MOFs composites to modulate the optical properties of fluorescent molecules, which is less reported. In this paper, based on the fluorescence enhancement effect of AuNPs on 2-(2-hydroxyphenyl)-1H-benzimidazole (HPBI) molecules, zeolitic imidazolate framework-8 (ZIF-8) crystals with structural stability were introduced. AuNPs@ZIF-8 exhibited a significantly pronounced fluorescence enhancement of the HPBI molecules. In addition, by comparing the fluorescence characteristics of the HPBI molecules adsorbed on AuNPs@ZIF-8 and those captured in AuNPs@ZIF-8, we found that the ZIF-8 can act as a spacer layer with highly effective near-field enhancement. All our preliminary results shed light on future research on the composite structures of noble metal particles and MOFs for fluorescent probes and sensing applications.

Key words: ZIF-8, gold nanoparticles, fluorescence spectra, fluorescence lifetime

中图分类号:  (Optical materials)

  • 42.70.-a