铜配合物中游离水分子对光吸收和吸附Cr(Ⅵ)性能的影响
Effect of free water molecule in copper complexes on the performance of light absorption and adsorption of Cr(Ⅵ)
作者单位E-mail
杨少龙 广西大学化学与化工学院, 南宁 530004
梧州学院机械与资源工程学院, 梧州 543003 
 
陈瑜欢 梧州学院机械与资源工程学院, 梧州 543003  
颜睦伦 梧州学院机械与资源工程学院, 梧州 543003  
韦承婷 梧州学院机械与资源工程学院, 梧州 543003  
李石雄 广西大学化学与化工学院, 南宁 530004
梧州学院机械与资源工程学院, 梧州 543003 
lsx1324@163.com 
贾冰婧 梧州学院机械与资源工程学院, 梧州 543003  
摘要: Cu (ClO42·6H2O和(1-甲基-1H-苯并咪唑-2-基)甲醇(HL)在甲醇和乙腈混合溶液中反应生成了深蓝色的[Cu (HL)3](ClO42·H2O (1)和浅蓝色的[Cu (HL)3](ClO422)。利用元素分析、IR、热重和单晶X射线衍射对它们的结构进行表征分析。测试结果表明配合物12均由[Cu (HL)3]2+和抗衡阴离子ClO4-组成,只是1中多了一个游离水分子。配合物12中的Cu(Ⅱ)均是与来自配体的N原子和O原子配位,配位数为6。热重分析结果表明,配合物12均能在30~245℃范围内结构保持不变。但是,深蓝色的配合物1比浅蓝色的配合物2在289 nm处有着更宽的吸收峰;吸附实验表明配合物1在pH=4~8条件下吸附Cr(Ⅵ)的性能优于配合物2。可见配合物1中游离水分子对光吸收和吸附Cr(Ⅵ)有一定的影响。
关键词: 配合物  晶体  结构  性能  影响
基金项目: 广西高校中青年教师科研基础能力提升项目(No.2023KY0710)、广西自然科学基金(桂科AD23026019)和国家级大学生创新创业训练项目(No.202311354014)资助。
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
投稿时间:2023-06-02 修订日期:2023-09-27
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杨少龙,陈瑜欢,颜睦伦,韦承婷,李石雄,贾冰婧.铜配合物中游离水分子对光吸收和吸附Cr(Ⅵ)性能的影响[J].无机化学学报,2023,39(11):2160-2168.
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