Abstract
Three new bismuth-based compounds, Bi2O(XO4)(IO3)2 (X = S, Se, Cr) have been synthesized by hydrothermal method and characterized by single-crystal X-ray diffraction. Title compounds crystallize in the monoclinic space group P21/n (No.14) with lattice parameters: a = 7.2391(5), b = 17.9074(12), c = 7.7964(5) Å, β = 109.6521(15) °, Z = 4 for Bi2O(SO4)(IO3)2; a = 7.2665(4), b = 18.0115(10), c = 7.9310(5) Å, β = 109.7480(10) °, Z = 4 for Bi2O(SeO4)(IO3)2; and a = 7.2708(6), b = 17.9967(14), c = 7.8998(6) Å, β = 109.799(2) °, Z = 4 for Bi2O(CrO4)(IO3)2, respectively. All compounds exhibit three-dimensional frameworks that are composed of [Bi4O2]8+ clusters, [IO3]− and [XO4]2− (X = S, Se, Cr) groups. Bi atoms occur in two different coordination types, showing the stereochemical influence of the Bi3+ lone electron pair. Title compounds were characterized by infrared spectra, solid state UV–vis–NIR diffuse reflectance spectroscopy and thermogravimetric analysis.
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