A 3D Homochiral Mn(II) Coordination Polymer Based on the Ligand 2,2′-(Ethane-1,2-diylbis(oxy)) Dicinnamic Acid

A 3D homochiral coordination polymer [Mn(edca)](n) (1) was synthesized from a flexible coupled cinnamic acid ligand, 2,2'-(ethane-1,2-diylbis(oxy)) dicinnamic acid (H(2)edca) and MnCl2 center dot 4H(2)O under solvothermal conditions. The complex crystallizes in orthorhombic, space group P2(1)2(1)2(1) with a = 5.5785(8), b = 13.0393(18), c = 23.133(3) angstrom, V = 1682.7(4) angstrom(3), Mr = 407.27, Dc = 1.608 Mg/cm(3), F(000) = 836, Z = 4, the final R = 0.0240 and wR = 0.0590 for 2983 observed reflections (I > 2 sigma(I)). In 1, the edca(2+) anions alternately bridge the Mn(II) cations to form one-dimensional (1D) infinite helical chains of [Mn(edca)](n), which are further connected by the ligands generating a three-dimensional (3D) homochiral network. The photoluminescence of 1 was also investigated in solid state at ambient temperature.