Metal-controlled structural diversity in Co(II) and Zn(II) complexes with mixed N- and O-donors: Synthesis, characterization and property

Co(II) and Zn(II) complexes based on 1-(5-tetrazolyl)-4-(1-imidazolyl)benzene (HL) and 1,4-benzenedicarboxylic acid (H2pbda): [Co2(L)2(pbda)(H2O)3] (1) and [Zn(L)(pbda)0.5] (2) have been prepared under hydrothermal conditions and characterized by single crystal and powder X-ray diffractions, IR, and thermogravimetric analysis. Complex 1 exhibits binodal (3,5)-connected 2D net structure with (3.52)(32.53.64.7) topology; while 2 is a binodal (3,4)-connected 2-fold interpenetrating 3D framework with dmc (4.82)(4.85) topology. The influence of coordination geometries of metal centers on the structures of resultant complexes is discussed. Moreover, magnetic property of 1 and luminescence of 2 were investigated.