【摘要】 测定了ＶＯＳＯ４与蛋氨酸（Ｍｅｔ）及ＶＯＳＯ４与蛋氨酸、邻菲咯啉（Ｐｈｅｎ）在不同酸度（ｐＨ＝１～１４）的乙二醇／水（１∶１）溶液中的低温ＥＰＲ波谱，发现在不同ｐＨ下生成不同组成、结构的配合物，利用Ｊｏｈｎｓｏｎ加合规则并结合ＩＲ，推测了不同ｐＨ下生成配合物的可能结构．根据ＥＰＲ波谱参数计算了配合物的键参数，得出随溶液ｐＨ值增大，氨基酸取代的水分子数增多，生成配合物的δ２值下降，即共价键成份增加．利用电子光谱数据计算了配合物的晶体场参数，讨论了成配规律，得出Ｐｈｅｎ与ＶＯ（Ⅱ）配位能力比Ｍｅｔ强得多更多还原

【Abstract】 EPR spectra of VO Met and VO Met Phen systems in glycol and water (1∶1) solution at various acidities have been observed at low temperature. It was found that in different pH ranges different structural complexes were formed. According to Johnson’s rule and IR, their possible structures were suggested. The bonding parameters of complexes were calculated by EPR parameters. It can be seen that the δ 2 of complexes decrease as the number of ligands bound to vanadium increase. This means that the covalent bonding between vanadium and ligands increase as amino acid ligands replace water ligands. Using electronic spectral data, the crystal field parameters were calculated. The coordination law was discussed. It was obtained that the coordination capacity of phen is much stronger than one of Met.更多还原