摘要
考察了CuCl2.2H2O与没食子酸丙酯(PG)在水溶液中生成没食子酸丙酯-铜(PG-Cu)金属配合物的反应。通过元素分析、摩尔电导率、红外光谱、热分解和循环伏安法对固体产物进行了表征,确定其分子式为[C10H10O5]2Cu.2H2O。红外光谱表明金属离子与酚羟基发生配位。热分析表明配位破坏了PG的氢键网状结构,降低了PG对抗热诱导分裂的能力。电化学数据显示配合物的氧化峰电位较配体有明显的降低,说明PG-Cu配合物的抗氧化能力优于PG配体。
The interactions of CuCl2·2H2O with propyl gallate（PG） in water solution is researched. The isolated solid complex is characterized by elemental analysis, molar conductance, infrared, thermal decompasition and cyclic voltammeter. The results support the formation of complex of the formula [ C10H10O5 ]2Cu·2H2O. The infrared spectra of the isolated solid complex suggest the phenol hydroxyl group is coordinated to the copper centre. The thermal analysis indicates that the coordination destroyed the hydrogen bonds network structure between propyl gallate molecules, and weakened the stability of the propyl gallate against the heat-induced decomposition. The electrochemical data show a considerable decrease of the oxidation potentials of the complex. Thus, the copper（ Ⅱ） complex is a more effective antioxidant than the free propyl gallate ligand.
出处
《武汉理工大学学报》
CAS
CSCD
北大核心
2009年第23期35-38,共4页
Journal of Wuhan University of Technology
基金
湖北省教育厅科研重点项目(D20081102)
