引用本文:
唐世华, 黄建滨. Cu2＋和Fe3＋与明胶的相互作用[J]. 物理化学学报,
2001, 17(10): 873-878.
doi:
10.3866/PKU.WHXB20011003
Citation: Tang Shi-Hua, Huang Jian-Bin. Study on Interactions of Gelatin with Cu2＋ and Fe3＋[J]. Acta Physico-Chimica Sinica, 2001, 17(10): 873-878. doi: 10.3866/PKU.WHXB20011003
Citation: Tang Shi-Hua, Huang Jian-Bin. Study on Interactions of Gelatin with Cu2＋ and Fe3＋[J]. Acta Physico-Chimica Sinica, 2001, 17(10): 873-878. doi: 10.3866/PKU.WHXB20011003
Cu2＋和Fe3＋与明胶的相互作用
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.
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关键词:
- 明胶;金属离子影响;荧光猝灭;明胶螯合物
English
Study on Interactions of Gelatin with Cu2＋ and Fe3＋
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 microIR 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＋.
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