| Cu2＋和Fe3＋与明胶的相互作用 |
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| 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 |
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| 作者姓名： | 唐世华 黄建滨 |
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| 作者单位： | Institute of Physical Chemistry, Peking University, Beijing 100871 |
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| 基金项目： | 国家自然科学基金(29992590-4,29733110)、国家教委骨干教师和河南省教委重点科研(97150022)资助项目 |
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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.
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| 关 键 词： | 明胶 金属离子影响 荧光猝灭 明胶螯合物 |
| 收稿时间： | 2001-02-21 |
| 修稿时间： | 2001-02-21 |
Study on Interactions of Gelatin with Gu2+ and Fe3+ |
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| Tang Shi-Hua,Huang Jian-Bin. Study on Interactions of Gelatin with Gu2+ and Fe3+[J]. Acta Physico-Chimica Sinica, 2001, 17(10): 873-878. DOI: 10.3866/PKU.WHXB20011003 |
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| Authors: | Tang Shi-Hua Huang Jian-Bin |
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| Affiliation: | Institute of Physical Chemistry, Peking University, Beijing 100871 |
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| 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＋. |
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| Keywords: | Gelatin Influence of metal ions Fluorescence quenching 2＋ and Fe3＋',') " >Chelates gelatin with Cu2＋ and Fe3＋ |
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