Crystal Structure and Luminescence of a New Zn(Ⅱ) Complex [Zn(L)(IPP)(H_2O)]·2H_2O Based on Nicotinate Derivative and 1,10-Phenanthroline Derivative

A new Zn(Ⅱ) complex, [Zn(L)(IPP)(H2O)]·2H2O(1, H2 L = 3-carboxy-1-carboxymethyl-2-oxidopyridinium and IPP = 2-(1H-imidazo[4,5-f][1,10]phenanthrolin-2-yl)phenol), was synthesized under hydrothermal conditions and its structure was determined by single-crystal X-ray diffraction. It crystallizes in triclinic, space group P1 with a = 8.5023(17), b = 9.945(2), c = 15.573(3) ?, α = 95.87(3), β = 102.56(3), γ = 100.73(3)o, V = 1248.7(4) ?3, Z = 2, C27H22N5O9 Zn, Mr = 625.87, Dc = 1.665 g/cm3, F(000) = 642, μ(Mo Ka) = 1.053 mm-1, R = 0.0474 and w R = 0.1352. In 1, one L2-, one IPP and one water molecule coordinate to the same Zn(II) atom to give a discrete complex with two lattice water molecules. Adjacent [Zn(L)(IPP)(H2O)]·2H2O molecules interact through π-π stacking between two IPP ligands to form a supramolecular chain. The N–H···O and O–H···N hydrogen bonds further stabilize the supramolecular chain structure of 1. The solid state luminescent property of 1 was also studied.