高等学校化学学报 ›› 1991, Vol. 12 ›› Issue (11): 1522.

• 论文 • 上一篇    下一篇

滴定量热法研究氨基酸羧基质子化反应

张保林1, 王文清1, 李忠1, 陶祖贻2   

  1. 1. 北京大学技术物理系, 北京, 100871;
    2. 兰州大学现代物理系
  • 收稿日期:1990-07-04 出版日期:1991-11-24 发布日期:1991-11-24
  • 通讯作者: 王文清
  • 基金资助:

    国家自然科学基金

Titration Calorimetry Study on the Protonation Reaction of α-Carboxyl Group of Ammo Acids

Zhang Bao-lin1, Wang Wen-qing1, Li Zhong1, Tao Zu-yi2   

  1. 1. Department of Technical Physics, Peking University, Beijing, 100871;
    2. Department of Modern Physics, Lanzhou University, Lanzhou
  • Received:1990-07-04 Online:1991-11-24 Published:1991-11-24

摘要: 氨基酸是典型的两性物质,其羧基质子化常数已有报道,文献结果大都由pH电位法得到,而对氨基酸光学异构体(D、L、DL)的对比研究甚少,为检验光学活性起源理论中提出的D与L分子间的能量差异。

关键词: 滴定量热, 氨基酸, 质子化

Abstract: The thermodynamic functions of protonation reactions of α-carboxyl group of twelvekinds of amino acids--alanine?valine, lysine, leucine, phenylalanine, methionine, trypto-phan, threonine, serine, arginine, glutamic acid and glycine, have been determined by titration calorimetry combined with computer fit program. The differences between △H, AG, lgK, △Sof the protonation reactions of amino acids have been reported. By comparison with pHtitration method, it is simple, rapid and would be obtained simultaneously the total thermodynamic functions-IgK, △H, △G and △S.

Key words: Titration calorimetry, Arnino acid, Protonation reaction

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