Two Tetranuclear Zinc(Ⅱ) Coordination Polymers Based on 3,5-Bis(2-carboxylphenoxy)benzoic Acid with Highly Selective Sensing of Nitrobenzene

摘要

Two novel zinc(Ⅱ) coordination polymers,[Zn2(BCB)(CH3OH)(μ3-OH)]n (1) and {[Zn2(BCB)(μ3-OH)(H2O)2]·CH3OH}n (2),have been constructed from 3,5-bis(2-carboxyl-phenoxy)benzoic acid (H3BCB) and characterized by elemental analysis (EA),IR,powder X-ray diffraction (PXRD),and thermogravimetric (TG) analyses.Structural analysis reveals that complexes 1 and 2 are both 1D polymeric chains with unprecedented tetranuclear {Zn4(COO)4(μ3-OH)2} clusters,which were further expanded into a 2D structure.Fluorescence measurements show that 1 and 2 have highly selective and sensitive detection of nitrobenzene.