Construction of two new Zn(II)-guanazole frameworks via varying organic carboxylate ligands

• Two new Zn(II) compounds tuned by different carboxylate ligands.
• They show strong luminescence at room temperature.
• A rare hybrid [(H2O)3(DMA)2] pentamer was found.

Two new inorganic–organic hybrid compounds with different topological structures, namely [Zn2(btc)(datrz)]n (1) and [Zn2(btec)(Hdatrz)]n (2) (H3btc = 1,3,5-benzenetricarboxylic acid, H4btec = 1,2,4,5-benzenetetracarboxylic acid, Hdatrz = 3,5-diamino-1,2,4-triazole), have been hydrothermally synthesized by the reactions of Zn(II) salt with H3btc and Hdatrz or H4btec and Hdatrz. Single X-ray analysis reveals that compound 1 is a three-dimensional (3D) pillar-layer framework and can be described as a 4-nodal net with the schläfli symbol of {4.62}2{4.64.8}2{4.65}2{42.610.82.10}, and compound 2 is also a three-dimensional (3D) framework and can be simplified into a 4-nodal topological network the schläfli symbol of {3.42.5.62}2{32.42.52.64.74.8}{32.44.54.62.73}{42.62.7.8}. In these two compounds, the Hdatrz ligand displays distinct coordination modes. Moreover, the luminescent properties of these two compounds were also investigated in the solid state at room temperature.