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本文用紫外光谱研究Ca(Ⅱ)-BSA和Ni(Ⅱ)-BSA配合物的结构随BSAL浓度的变化,发现当浓度增大并>2×10~(-4)-3×10~(-4)mol·dm~(-3)时,这两种配合物从五配位的四方锥构型转变成四配位的四方平面构型,首次提供了BSA的Asp羧基氧参与同Cu(Ⅱ)和Ni(Ⅱ)配位的证据.计算并讨论了Cu(Ⅱ),Ni(Ⅱ)和有关配体轨道的光学电负性.
In this paper, the structure of Ca (Ⅱ) -BSA and Ni (Ⅱ) -BSA complex was studied by UV spectroscopy. The results showed that when the concentration of BSAL was increased and> 2 × 10 -4 -4 × 10 ~ (- 4) mol · dm ~ (-3), the two complexes changed from quintic tetragonal pyramidal configuration to tetragonal tetragonal tetragonal configuration, providing for the first time that Asp carboxy oxygen of BSA is involved in the interaction with Cu ) And Ni (Ⅱ). The optical electronegativities of Cu (Ⅱ), Ni (Ⅱ) and related ligands were calculated and discussed.