Cu(II)-Based Metal–Organic Framework Loaded with Silver Nanoparticles as a Catalyst for the A3‑Coupling Reaction

• Published in: ACS applied nano materials Vol. 7; no. 3; pp. 3210 - 3219
• Main Authors: Xie, Wang, Shi, Conghao, Li, Heng, Liu, Li, Zhao, Yue, Lin, Chen
• Format: Journal Article
• Language: English
• Published: American Chemical Society 09.02.2024
• Subjects: catalysis; A3-coupling reaction; silver nanoparticles; benzothiadiazole; metal−organic frameworks
• ISSN: 2574-0970; 2574-0970
• DOI: 10.1021/acsanm.3c05533

The embedding of metal nanoparticles (NPs) in metal–organic frameworks (MOFs) has attracted a wide range of attention in the field of catalysis due to the high agglomeration resistance of NPs in MOFs. In this work, a Cu­(II)-based MOF with the formula {[Cu1.5(TPA)­(BIBT)]·4DMF·6H2O]} n (1) (H3TPA = tris­(4′-carboxybiphenyl)­amine; BIBT = 4,7-di­(1H-imidazol-1-yl)­benzo­[c]­[1,2,5]­thiadiazole; and DMF = N,N-dimethylformamide) was synthesized under solvothermal condition. Structural analysis revealed that Cu-MOF 1 possessed 3-fold interpenetrated three-dimensional (3D) coordination frameworks with large one-dimensional (1D) channels along the a-axis. Due to the interaction between Ag and S/N, Ag NPs could be encapsulated into the pores of Cu-MOF 1 to generate Ag NPs and MOF composites, x Ag/1 (x = 0.3, 0.5, 0.8, and x was the molar ratios of AgNO3 with Cu-MOF 1 in the synthesis), which was further demonstrated by powder X-ray diffraction, Fourier transform infrared, scanning electron microscopy, transmission electron microscope, energy dispersive spectrometer, X-ray photoelectron spectroscopy, and Brunauer–Emmett–Teller (BET) analysis. In addition, synthesized 0.5Ag/1 exhibited outstanding catalytic activity for the A3-coupling reaction of aldehyde, alkyne, and amine with high recyclability. This work presents a viable strategy for using Cu­(II)-based MOF loading with Ag NPs as heterogeneous catalysts for the A3-coupling reaction.