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Published on: October 6, 2023
A Lead Carboxylate-Azolate Metal-Organic Framework Based on Hexanuclear Clusters: Luminescence and Accelerating the
1Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education National Demonstration Center for Experimental Chemistry Education (Northwest University) Shaanxi Key Laboratory of Physico-Inorganic Chemistry College of Chemistry & Materials Science, Northwest University, Xi'an, 710069, P. R. China.
Abstract:
A lead carboxylate-azolate framework, [Pb3 (μ4 -O)(L)2 (H2 O)] ⋅ 2H2 O (1), has been constructed from the reaction of 2-methyl-4-(1H-tetrazol-5-yl) benzoic acid (H2 L) and Pb(NO3 )2 under solvothermal conditions. Compound 1 contains an unprecedented hexanuclear cluster [Pb6 (μ4 -O)2 (COO)4 (CN4 )2 ], which as an 8-connected node is connected by 3-connected L linkers to give rise to a three-dimensional framework with an uncommon (3,8)-connected tfz-d; UO3 topology. Framework 1 possesses strong solid-state yellow luminescence (563 nm), which stems from ligand-to-metal charge transfer (LMCT), however, the removal of water molecules in 1 lead to the significant luminescent decrease of the sample. Importantly, in the presence of 1, the thermal decomposition of ammonium perchlorate is significantly accelerated.
