Citation: Xin ZHANG, Xinyi JIAO, Wanqiao BAI, Xuehua SUN, Huali CUI, Yixia REN, Hongmei CHAI. Flexible Gd-MOF@PMMA/BMA composite film fluorescent sensor for highly sensitive detection of tyramine in bananas[J]. Chinese Journal of Inorganic Chemistry, ;2026, 42(2): 217-226. doi: 10.11862/CJIC.20250219 shu

Flexible Gd-MOF@PMMA/BMA composite film fluorescent sensor for highly sensitive detection of tyramine in bananas

Shaanxi Key Laboratory of Chemical Reaction Engineering, College of Chemistry and Chemical Engineering, Yan′an University, Yan′an, Shaanxi 716000, China

Corresponding author: Hongmei CHAI, chm8550@163.com
Received Date: 1 July 2025
Revised Date: 24 September 2025

Figures(5)

In this study, using 3, 5-di(3′, 5′-dicarboxylphenyl)-1H-1, 2, 4-triazole (H₄L) as ligands, a gadolinia-based organic framework complex {[GdNa(L)(H₂O)₃]·2H₂O}_n (Gd-Na-MOF) was successfully designed and synthesized by hydrothermal method. The structure and properties were systematically characterized and tested by techniques such as single-crystal X-ray diffraction, powder X-ray diffraction, thermogravimetric analysis, infrared spectroscopy, and fluorescence spectroscopy. The results indicate that this complex has a unique 3D structure, excellent thermal stability, and outstanding luminescent performance. Based on its luminescent properties, a polymer-embedding method was employed to fabricate the Gd-Na-MOF into a flexible, washable composite fluorescent film, Gd-Na-MOF@PMMA/BMA (PMMA=polymethyl methacrylate, BMA=butyl methacrylate). This fluorescent film exhibited highly sensitive recognition capability for tyramine, with a low detection limit of 1.66 μmol·L^-1. It was used for the detection of tyramine in bananas, with a recovery rate of 96.92%-100.26%.
- metal-organic frameworks,
- Gd-Na-MOF@PMMA/BMA composite fluorescent film,
- fluorescent sensing,
- tyramine
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