Three coordination polymers based on tris(p-carboxyphenyl) phosphane oxide with luminescent sensing acetone, nitrobenzene derivatives and Fe3+ ion

Abstract

Three coordination polymers (CPs), {[Zn(HL)]·2CH3CN}n (1) {[Co(HL)(bimb)]·4H2O}n (2) and {[Cd(HL)(bimb)]·3EtOH·3H2O·DMF}n (3) (H3L = tris(p-carboxyphenyl)phosphane oxide, bimb = 1,4-bis(imidazol-1-ylmethyl)benzene) have been synthesized under solvothermal conditions. Their structures have been determined by single-crystal X-ray diffraction analysis and further characterized by elemental analysis, IR spectra, powder X-ray diffraction (PXRD) and thermogravimetric (TG) analysis. Structural analyses reveal that complex 1 appears a 3D 3,5-connected {4.62}2{42.69.84} net. While 2 and 3 are 1D polymeric chains that were further packed into 3D supramolecular architectures through hydrogen bond interactions. Furthermore, fluorescence measurements indicate that the complex 1 can sensitively sense acetone, nitrobenzene derivatives and Fe3+ ion, which implies that the 1 is expected to be luminescence sensor materials for sensing small molecules and metal ions.