Structural diversity of five new bitriazole-based complexes: luminescence, sorption, and magnetic properties

作者：Du, Li-Yun; Wang, Hui; Liu, Ge; Xie, Dong; Guo, Fu-Sheng; Hou, Lei^*; Wang, Yao-Yu

来源：Dalton Transactions, 2015, 44(3): 1110-1119.

DOI：10.1039/c4dt03129f

• METAL-ORGANIC FRAMEWORK
• SOLID-STATE TRANSFORMATION
• COORDINATION POLYMERS
• SUPRAMOLECULAR ISOMERISM
• CRYSTAL-STRUCTURE
• CLUSTERS
• LIGAND
• SENSOR
• COPPER(II)
• SOLVENT

Employing an uninvestigated eight N-donor bitriazole ligand, 5'-(pyrazin-2-yl)-2H,4'H-3,3'-bi(1,2,4-triazole) (H(2)pzbtz), five complexes, {[Zn-2(pzbtz)(SO4)(H2O)(2)]center dot 2H(2)O}(n) (1), {[Cd(pzbtz)]center dot 3H(2)O} n (2), [Zn-3(Hpzbtz)(2)(SO4)(2)(H2O) 6] (3), [Co(Hpzbtz)(2)(H2O)(2)] (4) and {[Co-2(pzbtz)(2)(H2O)(2)]center dot 4H(2)O} n (5), have been solvothermally synthesised by altering the reaction solvents and temperatures. Complex 1 shows a three-dimensional (3D) framework with a very rare (3,5)-connected fsc-3,5-Cmce-2 topology. Complex 2 exhibits a (4,4)-connected 3D pts framework with 1D channels. Complexes 3 and 4 are discrete trinuclear and mononuclear molecules, respectively. Complex 5 presents a chiral 3D framework based on a novel trinuclear Co-3(tr)(4) cluster and features an unusual six-connected lcy topology. In the five complexes, H(2)pzbtz show a very variety of geometrical configurations and coordination modes. Due to the planarity of H(2)pzbtz, complexes 1-3 display strong photoluminescence; in particular, 1 features highly selective luminescent sensing for the Cu2+ ion and nitrobenzene molecule. In addition, 2 shows highly selective adsorption for CO2 over CH4, and 5 exhibits antiferromagnetic exchange interactions among the Co2+ ions.

• 出版日期2015
• 单位西北大学