Hydrothermal synthesis, crystal structure, luminescence and electrochemical properties of trinuclear zinc(II) complex Zn3(phen)2(2,4-DAA)6

A novel complex Zn-3 (phen)(2)(2,4-DAA)(6)(2,4-DAA = 2,4-dichlorophenoxy acetic acid phen = 1,10 phenanthroline) was synthesized by means of hydrothermal method and characterized as crystallizing in the triclinic system with space group P (1) over bar, a = 1.1030(2) nm, b = 1. 2930(3) nm, c = 1.5081 (3) nm, alpha = 100.436 (3)degrees beta = 110.227 (3)degrees, gamma = 103.802(3)degrees V = 1.8760(7) nm(3), D-c = 1.661 g/cm(3), Z = 1, F(000) = 944. Final GooF = 1.033, R-1 = 0.0326, wR(2) = 0.0736. The crystal structure shows that the three coordinated zinc (II) ions lie in the same line with the middle one as the symmetric center. The distance between the central zinc( and the symmetric one is 0. 3378 rim. There exist two coordination modes for the three zinc(II) ions: (I) The symmetric zinc(II) ions are coordinated with three oxygen atoms and two nitrogen atom from three 2,4-dichlorophenoxy acetic acid molecules and one 1,10 phenanthroline molecule, respectively, forming a distorted square-pyramid coordination geometry. (2) The middle zinc(II) ions is coordinated with six oxygen atoms from six 2,4-dichlorophenoxy acetic acid molecules, respectively, forming a distorted octahedral coordination geometry. The luminescence and electrochemical properties of the complex are also studied.