Three coordination polymers based on 9,10-di(pyridine-4-yl) anthracene ligand: Syntheses, structures and fluorescent properties

Three new mixed-ligand divalent coordination polymers (CPs) {[Zn-3(L)(1,4-bdc)(3)].2DMF}(n) (1), {[Zn-2(L)(2;6-ndc)(2).3DMF}(n) (2) and {[Cd-2(L)(3)(2,6-ndc)(2)]}n (3) [L = 9,10-di(pyridine-4-yl)anthracene, 1,4H(2)bdc = 1,4-benzenedicarboxylic acid, 2,6-H(2)ndc = 2,6-naphthalenedicarboxylic acid] have been prepared and well characterized by elemental analyses, infrared spectroscopy, single-crystal X-ray diffraction techniques, powder X-ray diffraction patterns and thermogravimetric analyses. The crystal structure analyses of coordination polymers (CPs) reveal that all the complexes 1-3 have the three-dimensional (3D) coordination networks. The structure of I can be simplified as a sqc3 3D 8-connected framework with the point symbol of (4(24).6(4)). Particularly, in the presence of the linear 2,6-H(2)ndc auxiliary ligand, a double-deck interpenetrating pcu 3D network of 2 is assembled by 6-connecting framework with the point symbol of (4(12).6(3)). Complex 3 exhibits a ttd 3D 5-connected net with a point symbol of (4(6).6(4)). Further, the solid-state luminescent properties of the complexes 1-3 were measured and studied at room temperature. (C) 2017 Published by Elsevier B.V.