Synthesis, characterization, and investigations of some luminescent and catalytic properties of coordination polymers assembled from 5-(Pyridin-3-yl)isophthalic acid

Abstract

The reactions of a semirigid carboxylic ligand 5-(Pyridin-3-yl)isophthalic acid(H2pyip) with Mn(CH3COO)2/Zn(NO3)2/Pb(NO3)2 afforded three new complexes: [Mn(pyip)(H2O)2]n(1), [Zn(pyip)(H2O)2]n(2), and [Pb(pyip)]n(3). Their structures have been determined by single-crystal X-ray diffraction analyses and further characterized by elemental analyses, IR spectra, powder X-ray diffraction (PXRD), and thermogravimetric (TG) analyses. X-ray structure analysis reveals that complexes 1-2 showed identical 3D supramolecular architecture that just connect different metal centers. They all crystallize in hexagonal space group P6(5) and exhibit the same coordination mode. One of the H2pyip adopts bidentate chelate coordination mode, and the other coordinate carboxylate oxygen atom adopts the single dentate-bridging mode. Complex 3 adopts different coordination modes crystallized in monoclinic space group P2(1)/c compared to 1-2, combined bidentate chelate and chelating–bridging tetradentate coordination modes. A noticeable point in this paper is that compounds 1-3 exhibit preferable catalytic properties on degradation of Rhodamine B (RhB). Moreover, the luminescent properties were investigated.