A 2D coordination polymer of [Cd(mbix)(BIPA)] (1) (H2BIPA=5-bromoisophthalic acid and mbix=1,3-bis(imidazol-1-ylmethyl) benzene) has been hydrothermal prepared and characterized by elemental analysis,IR spectroscopy and single-crystal X-ray diffraction structure analysis. The crystal is of monoclinic,space group P21/n with a=1.002 0(4) nm,b=1.754 4(7) nm,c=1.208 8(5) nm,β=94.271(5),V=2.119 1(15) nm3,Dc=1.861 g.cm-3,Z= 4,F(000)=1 168,Goof=1.085,R1=0.045 0,wR2=0.093 1. The crystal structure shows that the Cd2 units are formed by the two caroboxylate group adopting tridentate-chelating-bridging coordination mode,which are linked to form a 2D layer structure by the ligands,and further extended into a 3D supramolecular structure through C-H …O hydrogen bonding interactions and π-π weak interactions. In addition,complex 1 exhibits strong photolumine-scent emission at room temperature. CCDC:710801.
A novel cadmium（Ⅱ） coordination polymer [Cd2（3-pa）4（4,4＇-bpy）（H2O）].3.08H2O 1 has been synthesized by pyridine-3-carboxylate （3-pall） and CdO with exo-bidentate rigid dipyridyl ligand 4,4＇-bipyridine （4,4＇-bpy） by using a hydrothermal method, its structure was determined by single-crystal X-ray diffraction and its luminescent property was also documented. Complex 1 crystallizes in orthorhombic space group Pbcn with a = 21.4074（14）, b = 27.1119（18）, c = 12.3879（8） A, V = 7189.9（8） A3, Z = 8, C34H32.16Cd2N6O12.08, Mr= 942.85, Dc = 1.742 g/cms, p = 1.255 mm-1 and F（000） = 3766. The structure was solved by direct methods and refined to R = 0.0353 and wR = 0.0891 for 6278 observed reflections （I 〉 2σ（I））. The most prominent structural feature is the mutual interpenetration of two identical 3-D open frameworks via filling the large void space, which gives a 2-fold interpenetrating architecture during the self-assembly process.
