Structures and properties of two coordination polymers constructed by the semirigid bi-functional 5-((1-methyl-1H-tetrazol-5-yl)thio)isophthalic acid ligand

Highlights: • Two new CPs were synthesized with a semirigid bi-functional ligand (H₂mttia). • These two CPs possess different structures, dimensionalities and topologies. • [Cd(mttia)(H₂O)]_n exhibits an intense fluorescent emission band. • [Cu(mttia)]_n shows a strong antiferromagnetic superexchange between Cu²⁺ ions. - Abstract: Two new coordination polymers, namely [Cd(mttia)(H₂O)]_n (1) and [Cu(mttia)]_n (2), have been synthesized with a novel semirigid bi-functional ligand 5-((1-methyl-1H-tetrazol-5-yl)thio)isophthalic acid (H₂mttia) under hydrothermal condition. The two compounds were characterized by single crystal X-ray diffraction, elemental analysis, infrared spectroscopy, thermogravimetric analysis and powder X-ray diffraction. It is demonstrated that compound 1 features a 2D 2-nodal layer with {4³}₂{4⁶·6⁶·8³} topology, while compound 2 exhibits a 3D (3,6)-connected framework with {4·6²}₂{4²·6¹⁰·8³} topology. Furthermore, the luminescent property of 1 and the magnetic property of 2 have been studied and discussed.