Synthesis, Structure and Luminescent Properties of a Two-dimensional Cobalt(Ⅱ) Coordination Polymer Based on 2-Thiobarbituric Acid

摘要

A two-dimensional coordination polymer [Co(H2tba)2(DMF)2]n 1 (H2tba =2-thiobarbituric acid anion,DMF =N,N-dimethylformamide) has been synthesized by COC12·6H2O with the 2-thiobarbituric acid ligands under solvothermal conditions.Compound 1 was further characterized by FTIR,elemental analysis,TGA and powder XRD techniques.Single-crystal X-ray diffraction studies revealed that the title compound crystallizes in the monoelinic space group Pbca with a =12.5948(12),b =11.4269(11),c =14.8939(15) (),V =2143.5(4) ()3,Z =4,Dc =1.523 g·cm-3,F(000) =1012,μ =1.038 mm-1,R =0.0358 and wR2 =0.0888 (I ＞ 2σ(I)).Single-crystal X-ray diffraction analysis reveals that 1 is the first two-dimensional noninterpenetrating (4,4) net coordination polymer based on the 2-thiobarbituric acid.Coordination polymer 1 exhibits two luminescent emission spectra at 477 and 489 nm with the excitation peak at 273 nm.