水杨醛天冬氨酸过渡金属配合物的ESR波谱及抗O2-性能

摘要

测定了水杨醛天冬氨酸Cu(Ⅱ)配合物在室温和低温下吡啶中的溶液ESR谱，室温溶液谱观测到二级效应和弛豫效应，给予了理论解释，计算了弛豫参数；根据低温ESR波谱参数，计算了键参数，讨论了配合物的成键特性和稳定性。利用ESR法直接测定了水杨醛天冬氨酸席夫碱配体及其铜、锌、钴、镍配合物抗O2-性能，结果表明：配体和配合物均有抗O2-性能，配合物清除能力比配体强，其中铜配合物清除O2-能力最强。%ESR spectra of the copper (Ⅱ) complex with salicylidene aspartic acid Schiff bases in pyridin solvent were investigated at different temperatures. The second order effect and the relaxation effect on the solution ESR spectrum at room temperature were observed and satisfactorily explained. The relaxation parameters were calculated. By using spectral parameters from ESR spectrum at low temperature, the bonding parameters of Cu(Ⅱ) complex were calculated. The bonding characterization and stability of the complex were disscussed. The properties of the ligand and the complexes of copper(Ⅱ), zinc(Ⅱ), cobalt(Ⅱ) and nickel(Ⅱ) in scavenging O2·- were directly measured by ESR. The results show that the ligand and complexes all have the scavenging O2·- ability, and the inhibition ability of the complexes were stronger than that of the ligand, and the inhibition ability of the coper(Ⅱ) complex was the strongest.