Cd(Ⅱ)-Based Fluorescent Sensing Organic Framework Constructed by Mixed Ligands and Its Performance

doi:10.16553/j.cnki.issn1000-985x.2024.0181

Abstract

Abstract: Under solvothermal conditions, using Cd(NO₃)₂·4H₂O as the metal source, pentamethylisophthalic acid (H₂MIP) ligand and 1,3-bis(2-methyl-1H-imidazol-1-yl)propane (BMIP) as mixed ligands, a novel Cd(Ⅱ) organic framework material {[Cd(MIP)(BMIP)]·2/3DMF}_n (SNUT-47) was constructed. X-ray single-crystal diffraction indicates that SNUT-47 exhibits a two-dimensional bilayer organic framework structure. The obtained complex was further characterized by powder X-ray diffraction, infrared spectroscopy, thermogravimetric analysis and other techniques. The positions of the experimental and simulated diffraction peaks match well, indicating that the synthesized SNUT-47 material has excellent phase purity and reproducibility. Fluorescence experiments show that SNUT-47 possesses excellent fluorescence properties and exhibits a significant fluorescence enhancement effect for Na⁺ in aqueous solution, making it an efficient fluorescent sensor for the detection of Na⁺ with a detection limit of 2.56×10^-6 mol/L. Additionally, SNUT-47 can be easily recycled after cyclic experiments with just water washing, demonstrating good recyclability.

Key words: Cd(Ⅱ) organic framework, mixed ligand, crystal structure, ions detection, fluorescent sensor

CLC Number:

O641.4

WANG Xinying, QIAO Decong, PAN Huibin, GAO Xia, LU Jiufu. Cd(Ⅱ)-Based Fluorescent Sensing Organic Framework Constructed by Mixed Ligands and Its Performance[J]. Journal of Synthetic Crystals, 2025, 54(1): 126-132.

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