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Effect of free water molecule in copper complexes on the performance of light absorption and adsorption of Cr(Ⅵ)
Author NameAffiliationE-mail
YANG Shao-Long School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
School of Mechanical and Resource Engineering, Wuzhou University, Wuzhou, Guangxi 543003, China 
 
CHEN Yu-Huan School of Mechanical and Resource Engineering, Wuzhou University, Wuzhou, Guangxi 543003, China  
YAN Mu-Lun School of Mechanical and Resource Engineering, Wuzhou University, Wuzhou, Guangxi 543003, China  
WEI Cheng-Ting School of Mechanical and Resource Engineering, Wuzhou University, Wuzhou, Guangxi 543003, China  
LI Shi-Xiong School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
School of Mechanical and Resource Engineering, Wuzhou University, Wuzhou, Guangxi 543003, China 
lsx1324@163.com 
JIA Bing-Jing School of Mechanical and Resource Engineering, Wuzhou University, Wuzhou, Guangxi 543003, China  
Abstract: Cu(ClO4)2·6H2O and (1-methyl-1H-benzimidazol-2-yl) methanol (HL) reacted in a mixed solution of methanol and acetonitrile to produce dark blue[Cu(HL)3](ClO4)2·H2O (1) and light blue[Cu(HL)3](ClO4)2 (2). Their structures were characterized by elemental analysis, IR, thermogravimetric analysis (TGA), and single-crystal X-ray diffraction. The test results showed that complexes 1 and 2 are both composed of[Cu(HL)3]2+ and the counter anion ClO4-, except for the addition of one free water molecule in 1. The Cu(Ⅱ) ions in 1 and 2 are coordinated with N and O atoms from the HL; the coordination number was six. The results of TGA showed that the structures of 1 and 2 could remain unchanged in a range of 30-245℃. However, complex 1 with a dark blue color had a wider absorption peak at 289 nm compared to 2 with a light blue color. The adsorption experiment showed that 1 exhibited better adsorption performance for Cr(Ⅵ) than 2 at pH=4-8. It can be seen that the free water molecule in 1 has a certain impact on light absorption and the adsorption of Cr(Ⅵ).
Keywords: complex  crystal  structure  performance  effect
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YANG Shao-Long,CHEN Yu-Huan,YAN Mu-Lun,WEI Cheng-Ting,LI Shi-Xiong,JIA Bing-Jing.Effect of free water molecule in copper complexes on the performance of light absorption and adsorption of Cr(Ⅵ)[J].Chinese Journal of Inorganic Chemistry,2023,39(11):2160-2168.
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Chinese Journal of Inorganic Chemistry