Syntheses, Structures of Three Zn(II) Coordination Polymers Based on Flexible 4-Substituted Bis(1,2,4-triazole) Ligand

Three new coordination polymers, {[Zn(mu(2)-btre)(mu(2)-adc)]center dot H2O}(n) (1 center dot H2O), [Zn-2(mu(2)-btre)(mu(2)-1, 4-bdc)2(H2O)(2)](n) (2) and [Zn(mu(2)-btre)(mu(2)-1, 2-bdc)](n) (3) were synthesized at room temperature condition and characterized by IR spectra, elemental analyses, single-crystal and powder X-ray diffractions (btre=1, 2-bis(1, 2, 4-triazol-4-yl) ethane, adc=1, 3-adamantanedicarboxylate, 1, 4-bdc=1, 4-benzenedicarboxylate, 1, 2-bdc=1, 2-benzenedicarboxylate). Structural analyses reveal that complex 1 exhibits a 2D (4, 4) network, and the adjacent 2D (4, 4) networks are connected into 3D network by strong pi-pi interactions. The structure of 2 and 3 are 3D and 2D (4, 4) network, respectively. Thermal stabilities and the solid-state luminescence at room temperature of 1, 2 and 3 were investigated. CCDC: 1848223, 1; 1848224, 2; 1848225, 3.