Synthesis, Crystal Growth And Optical Properties Of Novel Binary System Metal Borates

Metal borates are of current interest due to their rich structural chemistry and diverse applications in mineralogy, catalysis, ion-exchange and nonlinear optical materials. In transition metals, the Cd2+ ion shows flexible coordination environments and stereochemically active lone pairs, which has a strong tendency to form cadmium oxo/hydroxo clusters and nonlinear-optical, so studies of cadmium borates have attracted much more attention in recent years.Two metal borates, Cd2.42Zn0.58B206 and CdiMgB2O6 have been synthesized by using high temperature solid state reaction at different temperatures reaction; BIB2O4F have been synthesized by using solution method at different hydrothermal and temperatures reaction. The crystal of X-ray diffraction data are collected by X-ray single crystal diffractometer, the SHELX-97 software are used to resolve the crystal structure, and all of the compounds have been characterized by PXRD, IR, TGA.(1) The crystal structure was solved using single-crystal X-ray diffraction technique. It crystallizes in the space group C2/c with the cell parameters a 17.3048A, b = 8.4356A, c = 10.2962A, β = 93.157°, Z = 24. The fundamental building units in the structure are the BO3 triangle, tetrahedral CdO6 and CdOs (or ZnO5) anionic groups. These anions are joined together by sharing bridging O atoms to form an intricate three-dimensional framework. Differential thermal analysis and infra-red spectrum are performed on the reported compound.(2) The crystal structure of the compound was solved using single-crystal X-ray diffraction technique. It crystallizes in the space group P-1 with the cell parameters a = 5.7799(6)A, b = 6.0715(5)A, c = 7.2659(7) A, a = 78.225(7)°, p = 84.269(8)°, γ= 84.092(7)°, V= 247.48(4) A3, T = 101.8, Z = 2, μ(Mo Kα)= 8.674. This crystal structure is a three-dimensional structure with central symmetry. The fluorescence properties of the cristal with rare earth doping were studied preliminarily.(3) BiB2O4F is a fluoroborate, which crystallizes in the trigonal space group P32 with a=6.7147(1) A and c=6.4688(1)A, and the borate anion is a 3-fold helix chain formed by extensive linkage of three-membered borate rings (3BO4).