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

The reactions of a semirigid carboxylic ligand 5-(Pyridin-3-yl)isophthalic acid(H 2 pyip) with Mn(CH 3 COO) 2 /Zn(NO 3 ) 2 /Pb(NO 3 ) 2 afforded three new complexes: [Mn(pyip)(H 2 O) 2 ] n ( 1 ), [Zn(pyip)(H 2 O) 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 H 2 pyip 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.