Two Zinc Based Coordination Compounds Constructed from Two Azophenyl Ligands: Syntheses, Crystal Structure, and Photocatalytic Performance

摘要: Two novel coordination compounds based on zinc ions, 1,10-phenanthroline (phen) and two similar azophenyl ligands, 3,4-dicarboxyl-(3′,4′-dicarboxylazophenyl) benzene (3,4-H4dczpb), as well 2,3-dicarboxyl-(2′,3′-dicarboxylazophenyl)benzene (2,3-H4dczpb), namely [Zn(phen)(2,3-H2dczpb)(H2O)]·H2O (1), [Zn2(phen)4(3,4-H2dczpb)](3,4-H4dczpb)2·2H2O (2), have been synthesized under hydrothermal conditions, characterized by single crystal X-ray diffraction, Fourier transform infrared spectroscopy (FTIR), CHN elemental analysis, thermogravimetric analysis (TGA) UV–Visible diffuse reflectance spectra (UV–Vis DRS). Compound 1 was built up of one-dimensional [Zn(phen)(2,3-H2dczpb)(H2O)] chains, while compound 2 composed zero-dimensional discrete [Zn2(phen)4(3,4-H2dczpb)] unit uncoordinated 3,4-H4dczpb. The UV–Vis DRS results revealed that the E g values are 3.0 2.9 eV, respectively, implying both illustrate selective absorption in ultraviolet region. photocatalytic activities degradation methylene blue (MB) UV light irradiation were conducted, can decompose MB efficiently. Finally, TGA exhibited possess good thermal stability.