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

Abstract

AbstractTwo new coordination polymers [Cd(1,2‐BDC‐F4)(H2O)2(py)]n (1) and {[Cd(1,2‐BDC‐F4)(H2O)2](DMF)}n (2) were prepared from the vapor diffusion reactions of CdII acetate with tetrafluorophthalic acid (1,2‐H2BDC‐F4) under different solvent atmospheres, and structurally characterized by single‐crystal diffraction technique. Both complexes reveal polymeric coordination architectures. Complex 1 is a one‐dimensional (1D) double chain, which crystallizes in the space group, P212121. In 1, each CdII ion is hexacoordinate by five oxygen atoms from two terminal water and three 1,2‐BDC‐F4 anions with a μ3‐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\bar{1} space group. In 2, each CdII ion is heptacoordinate by seven oxygen atoms from two terminal water and four 1,2‐BDC‐F4 anions with a μ4‐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.