无溶剂法合成氨基酸水杨醛席夫碱锌的配合物

以L-丙氨酸或L-亮氨酸及水杨醛、乙酸锌为原料,通过无溶剂一步法合成了氨基酸水杨醛席夫碱锌(Ⅱ)配合物ZnL(H2O)].nH2O(L=sal-ala,sal-leu),用EDTA滴定法、元素分析、红外光谱、X射线粉末衍射、热分析等手段对配合物的组成和结构进行了表征。结果表明,锌分别与席夫碱配体中的亚氨基氮、羧基氧、酚羟基氧以及水分子中的氧形成了配位数为4的配合物,其热分解包括失水、配体的氧化分解过程,最后完全分解为氧化锌。

Synthesis of the Zinc(II) Complexes with Schiff Base Ligands Derived from Salicylaldehyde and Amino Acids by Solvent-free Method

Zinc(Ⅱ) complexes of amino acids Schiff bases was synthesized by one-step solvent-free reaction with L-leucine or L-alanine,salicylaldehyde and zinc acetate as base materials.The composition and structures of the complexes were characterized by method of EDTA titration,elemental analysis,IR spectrum,X-ray powder diffraction and TG-DSC analysis.The composition of the two complexes is ZnL(H2O)]·nH2O(L=sal-ala,sal-leu).Infrared spectra and thermal decomposition process of the complexes show the presence of coordination water molecules.The zinc ion is coordinated through the Schiff base ligands as terdentate with O,O and N donors from carboxylic,phenolic and imino groups,and O donors from water molecule respectively.The coordination number of zinc ion is four.Thermal decomposition of the complexes proceeds in several stages: dehydration,oxidation pyrolysis of the ligands,and the final residues is zinc oxide.