高等学校化学学报 ›› 2003, Vol. 24 ›› Issue (9): 1657.

• 论文 • 上一篇    下一篇

Salen Zn对氨基酸甲酯体系的手性分子识别研究

阮文娟, 张玉玲, 赵小菁, 江冬青, 朱志昂   

  1. 南开大学化学系, 天津 300071
  • 收稿日期:2002-12-25 出版日期:2003-09-24 发布日期:2003-09-24
  • 通讯作者: 朱志昂(1939年出生),男,教授,博士生导师,从事不对称催化与分子识别研究.E-mail:zazhu@nankai.edu.cn E-mail:zazhu@nankai.edu.cn
  • 基金资助:

    国家自然科学基金(批准号:20171024,20271030);天津市自然科学基金(批准号:023604011);教育部留学回国人员科研基金

Studies on Chiral Molecular Recognition of Salen Zn with Amino Acid Esters

RUAN Wen-Juan, ZHANG Yu-Ling, ZHAO Xiao-Jing, JIANG Dong-Qing, ZHU Zhi-Ang   

  1. Department of Chemistry, Nankai University, Tianjin 300071, China
  • Received:2002-12-25 Online:2003-09-24 Published:2003-09-24

摘要: 用光谱滴定法测定了手性SalenZn与D-和L-氨基酸甲酸客体在CHCl3中的分子识别反应的缔合常数,其大小顺序为K(LeuOMe)>K(ValOMe)>K(AlaOMe);K(ThrOMe)>K(SerOMe)>K(TyrOMe);且X(D型)>K(L型).根据van'tHoff方程确定了反应体系的热力学函数,并对体系的熵-焓补偿关系和对映体选择性进行了讨论.用分子力学和量子化学方法,对体系 的识别行为进行了计算研究,从理论上对实验现象及识别过程的规律性给予了合理解释.

关键词: Salen Zn, 氨基酸甲酯, 手性分子识别, 熵-焓补偿, 分子力学, 量子化学计算

Abstract: Using UV-Vis spectrophotometer technique, the association constants of chiral molecular recognition reaction were measured between Salen Zn and series D- and L-amino acid esters in CHCl3. The association constants decrease in the orders of K(LeuOMe) >K(ValOMe)>K(AlaOMe); K(ThrOMe)>K (SerOMe)>K(TyrOMe) and K(D)>K(L). The thermodynamic parameters were determined by Van't Hoff equation. The phenomenon of enthalpy-entropy compensation and enan-tiomer selection were discussed. In addition, the theory studies by means of molecular mechanics and quantum chemistry computation were performed, which gave the reasonable explanation for the experimental results and the behavior of molecular recognition.

Key words: Salen Zn, Amino acid ester, Chiral molecular recognition, Enthalpy-entropy compensation, Molecular mechanic, Quantum chemical calculation

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