Solvent-regulated Assembly of 1D and 2D CdII Coordination Polymers with Tetrafluorophthalate: Syntheses, Structures and Properties

Two new coordination polymers [Cd(1 2 BDC F-4) (H2O)(2)(py)](n) (1) and {[Cd(1 2 BDC F-4)(H2O)(2)](DMF)}(n) (2) were prepared from the vapor diffusion reactions of Cd-II acetate with tetrafluorophthalic acid (I 2-H2BDC-F-4) under different solvent atmospheres, and structurally characterized by single-crystal diffraction technique Both complexes reveal polymeric coordination architectures Complex 1 is a one dimensional (ID) double chain which crystallizes in the space group, P2(1)2(1)2(1) In 1, each Cd-II ion is hexacoordinate by five oxygen atoms from two terminal water and three 1,2 BDC F-4 anions with a mu(3) bridging mode, as well as one nitrogen donor from one pyridine molecule Complex 2 is a two dimensional (2D) layered network which crystallizes in the P (1) over bar space group In 2 each Cd-II ion is heptacoordinate by seven oxygen atoms from two terminal water and four 1 2-BDC F-4 anions with a mu(4) bridging mode The results clearly suggest that the judicious choice of solvent systems does play a critical role in the construction of coordination frameworks with distinct dimensionality and connectivity Their spectroscopic, thermal, and fluorescence properties have also been investigated