Hydrothermal Synthesis and Characterization of a Novel 2D Luminescent Silver(I) Microporous Framework with 4-(4-Aminobenzene)-1, 2, 4-triazole using Tetranuclear Silver(I) Clusters as Secondary Building Blocks.

The two-dimensional (2D) cluster-based silver(I) complex {[Ag2(μ3-L1)2(μ2-HL1)] ·H2O ·3NO3} n ( 1) was isolated under hydrothermal conditions using the multi-dentate triazole derivative ligand 4-(4-aminobenzene)-1, 2, 4-triazole (L1) and the corresponding silver(I) salts. The results indicate that 1 is constructed by tetranuclear AgI clusters as secondary building blocks. Each tetranuclear AgI cluster links four neighboring AgI clusters by eight bridging μ3-L1 ligands forming a two-dimensional (2D) microporous cluster-based framework. Compound 1 also represents a scarcely reported example of coordination frameworks with 4-(4-aminobenzene)-1, 2, 4-triazole. The solid-state fluorescence spectrum of 1 exhibits strong red-shifted enhanced photoluminescence emission in comparison with that of free L1. The versatile bidentate and tridentate coordination modes of L1 in 1 together with flexible dihedral angles between aromatic benzene and triazole rings also reveal great potential in the construction of functional frameworks with L1. [ABSTRACT FROM AUTHOR]