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Synthesis, Crystal Structure, and Photocatalytic Properties of a Zinc(II) Coordination Polymer Based on 3‐Hydroxy‐2‐pyridinecarboxylic Acid
Author(s) -
Gu Xingye,
Lv Wei,
Hui Yangyang,
Liu Xiao,
Wu Minghui,
Yang Yan,
She Shixiong
Publication year - 2019
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.201800525
Subject(s) - photocatalysis , zinc , monoclinic crystal system , crystal structure , diffuse reflectance infrared fourier transform , coordination polymer , thermogravimetric analysis , infrared spectroscopy , fourier transform infrared spectroscopy , chemistry , powder diffraction , diffuse reflection , carboxylate , crystallography , nuclear chemistry , materials science , stereochemistry , organic chemistry , catalysis , physics , optics , quantum mechanics
The zinc(II) compound, [Zn 3 (HL) 6 ] n ( 1 ) (H 2 L = 3‐hydroxypyridine‐2‐carboxylic acid) was synthesized by a solvothermal reaction of Zn(NO 3 ) 2 · 6H 2 O and 3‐hydroxypyridine‐2‐carboxylic acid as raw materials. The structure of complex 1 was determined by single‐crystal X‐ray diffraction analysis and further characterized by elemental analysis, Fourier transform infrared spectroscopy, thermogravimetric analysis, as well as powder X‐ray diffraction. X‐ray structure analysis demonstrates that the complex crystallizes in the monoclinic system, space group P 2 1 / n . There are three zinc ions in the asymmetric unit, which are either five‐coordinate or six‐coordinate. The asymmetric units are further bridged by the carboxylate of the organic ligands, featuring a 2D framework. The solid state diffuse‐reflectance UV/Vis spectra reveals that complex 1 has semiconducting nature with the energy bandgap ( E g ) estimated to be 3.11 eV. The photocatalytic properties of complex 1 in degradation of organic dyes were further investigated. Results showed that the complex could degrade 54 % of the dye methylene blue solution within 120 min under UV irradiation light and reused for five times without the decline of the photocatalytic activity.