Two novel 2D coordination polymers constructed from 5-aminoisophthalic acid and 4,4'-bipyridyl ligands: Syntheses, crystal structure, and photocatalytic performance

Two coordination polymers, [Zn(5-aip)(bpy)(0.5)]center dot H2O (1), and [Ni(5-aip)(bpy)(0.5)(H2O)]center dot 2H(2)O (2), constructed by 5-aminoisophthalic acid (5-H(2)aip), 4,4'-bipyridine (bpy), and corresponding ions, have been synthesized under hydrothermal conditions, and characterized by single crystal X-ray diffraction, Fourier transform infrared spectroscopy (FTIR), CHN elemental analysis and UV-Visible diffuse reflectance spectra (UV-Vis DRS). Both 1 and 2 were built up of two-dimensional [Zn(5-aip)(bpy)(0.5)] and [Ni(5-aip)(bPY)(0.5)(H2O)] sheets, respectively. The UV-Vis DRS results revealed that the E-g values of 1 and 2 are 3.4 and 2.4 eV, respectively. The photocatalytic activities of degradation of methyl orange (MO), methylene blue (MB) and MO&MB mixture over 1 and degradation of MB over 2 under UV light irradiation were investigated. The results revealed that 1 exhibited good performance to photocatalytically decompose MB, MO and MB&MO mixture, while 2 can only degrade MB efficiently. (C) 2017 Elsevier B.V. All rights reserved.