A novel three-dimensional 3d-4f heterometallic coordination polymer with unique (3,4)-connected topology and helical units: Synthesis, crystal structure and photoluminescence property

One new three-dimensional 3d-4f heterometallic coordination polymer. namely, {[EuZn2(tmdc)(2) (C2O4)(0 5)(H2O)(4)] 2H(2)O}(n) (1) (H(3)imdc = imidazole-4,5-dicarboxylic acid), has been successfully synthesized by the hydrothermal reactions of Eu2O3, Zn(NO3)(2) 6H(2)O, H(3)imdc, H2C2O4 2H(2)O and H2O. Single-crystal X-ray diffraction analysis reveals that complex 1 possesses 3D heterometallic framework containing 2D layer based on L-Zn2-L. (L = imdc) helical chains and L-EuZn-I. chains Complex 1 exhibits unprecedented (3.4)-connected four-nodal topology with Schlafli symbol (6 7 8) (6 7 9) (6 7(2) 8(2) 10) (7 8(2)) Moreover, the photoluminescence property of I was investigated in the solid-state at room temperature. (C) 2010 Elsevier B V All rights reserved