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

作者：Zhang, Yuyi; Bian, Yajie; Zhang, Wei; Liu, Yiting; Zhang, Xiaolei^*; Chen, Mengdi^*; Hu, Bingwen; Jin, Qingyuan^*

来源：Chinese Physics B, 2023, 32(5): 054208.

DOI：10.1088/1674-1056/ac81aa

• ZIF-8
• gold nanoparticles
• fluorescence spectra
• fluorescence lifetime

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.

• 单位
  复旦大学