物理化学学报 >> 2001, Vol. 17 >> Issue (10): 873-878.doi: 10.3866/PKU.WHXB20011003

研究论文 上一篇    下一篇

Cu2＋和Fe3＋与明胶的相互作用

唐世华;黄建滨   

  1. 北京大学物理化学研究所，北京　100871
  • 收稿日期:2001-02-21 修回日期:2001-05-09 发布日期:2001-10-15
  • 通讯作者: 黄建滨 E-mail:jbhuang@chem.pku.edu.cn

Study on Interactions of Gelatin with Cu2＋ and Fe3＋

Tang Shi-Hua;Huang Jian-Bin   

  1. Institute of Physical Chemistry, Peking University, Beijing　100871
  • Received:2001-02-21 Revised:2001-05-09 Published:2001-10-15
  • Contact: Huang Jian-Bin E-mail:jbhuang@chem.pku.edu.cn

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摘要： 利用荧光猝灭法， 研究了不同温度、酸度下， Cu2＋和Fe3＋与明胶的相互作用.计算了猝灭常数和结合常数.紫外光谱和显微红外光谱的测定结果表明， Cu2＋、Fe3＋与明胶分子中的酰胺键发生了作用.探讨了猝灭机理.计算出的热力学函数表明，在Cu2＋、Fe3＋与明胶的相互作用过程中熵变起主要的作用.

关键词: 明胶, 金属离子影响, 荧光猝灭, 明胶螯合物

Abstract: Interaction of the gelatin with Cu2＋ and Fe3＋ are investiged at different pH and temperatures by fluorescence quenching method. The mechanisms of fluorescence quenching of Cu2＋ and Fe3＋ to gelatin are studied at different pH. The quenching constants, binding constants, and the thermodynamic functions are calculated. The results of microIR and UV show that Cu2＋ and Fe3＋ interacte with the amido bond in the gelatin molecule. The entropy change is a main factor in the interaction process of the gelatin with Cu2＋ and Fe3＋.

Key words: Gelatin, Influence of metal ions, Fluorescence quenching, Chelates gelatin with Cu2＋ and Fe3＋