Citation: Shao-Long YANG, Yu-Huan CHEN, Mu-Lun YAN, Cheng-Ting WEI, Shi-Xiong LI, Bing-Jing JIA. 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. doi: 10.11862/CJIC.2023.179 shu

Effect of free water molecule in copper complexes on the performance of light absorption and adsorption of Cr(Ⅵ)

Shao-Long YANG ^{1, 2} ,
Yu-Huan CHEN ² ,
Mu-Lun YAN ² ,
Cheng-Ting WEI ² ,
Shi-Xiong LI ^{1, 2,,} ,
Bing-Jing JIA ²

1.
School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
2.
School of Mechanical and Resource Engineering, Wuzhou University, Wuzhou, Guangxi 543003, China

Corresponding author: Shi-Xiong LI, lsx1324@163.com
Received Date: 2 June 2023
Revised Date: 27 September 2023

Fund Project: 广西高校中青年教师科研基础能力提升项目 2023KY0710广西自然科学基金桂科AD23026019国家级大学生创新创业训练项目 202311354014

Figures(7)

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).
- complex,
- crystal,
- structure,
- performance,
- effect
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