摘要
用分光光度法测定了Cu(Ⅱ)、Co(Ⅱ)与组氨酸(His)形成配合物的紫外吸收光谱、平衡常数及配位数,探讨了pH值对配位反应的影响。结果表明,pH值越大,配合物越不稳定。在模拟生理条件下,Co(Ⅱ)配合物的稳定性比Cu(Ⅱ)配合物更好。
Histidine complexes of two kinds of transitional metal Cu（ Ⅱ ）and Co（ Ⅱ ）were synthesized. The ultraviolet-spectral property, the equilibrium constant, the complex constant and the influence of pH value on the reaction were discussed by spectrometric methods. The results showed that the stability of the complexes decreased with pH value. Under simulated physiological conditions,the stability of Co（ Ⅱ ） complex was stronger than that of Cu（ Ⅱ ） complex.
出处
《化学与生物工程》
CAS
2007年第11期24-25,30,共3页
Chemistry & Bioengineering
基金
湖北省教育厅重点科研项目(2004D005)
关键词
过渡金属
组氨酸
配合物
稳定性
transitional metal
histidine
complex
stability
