植物单宁与稀土配合物的合成及其分子光谱表征

Synthesis and Spectroscopy of Rare Earth-Vegetable Tannin Complexes

研究了稀土离子Pr3+、Nd3+与植物单宁(Tn)的固体配合物合成方法,经测定其组成分别为Pr3(Tn)·12Cl·18H2O;Nd3(Tn)·12Cl·21H2O,通过元素分析、傅立叶红外光谱、差热分析、紫外光谱分析研究了配合物的结构与性质,结果表明Pr3+、Nd3+与植物单宁的多酚基形成三配基配合物。配合物抑菌作用试验表明,植物单宁的抑菌作用是其多酚基团的作用结果。

The synthesis of vegetable Tannin with Pr^(3+),Nd^(3+) compounds are reported ,the complexes have composition of Pr_3 (Tn)·12Cl·18H_2O and Nd_3 (Tn)·12Cl·21H_2O.The structures and properties of these complexes were studied by elemental analysis, FT-IR, UV, and thermal analysis. The results show that Pr^(3+),Nd^(3+) form Dligand complexes with polyphenol ligand of vegetable Tannin. Testing of bacteriostasis of the complexes shows that the bacteriostasis of vegetable Tannin is based on its mutiphanol ligand.