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有机化学
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有机化学 ›› 2004, Vol. 24 ›› Issue (8): 957-961. 上一篇    下一篇

研究简报

单手性臂型脱氧胆酸分子裂缝对中性小分子的识别性能研究

彭游, 牟其明, 陈智勇, 陈淑华*   

  1. 四川大学化学学院 成都 610064
  • 收稿日期:2003-07-17 修回日期:2003-12-29 接受日期:2004-03-01 发布日期:2022-09-20
  • 通讯作者: * E-mail: chemchensh@sina.com
  • 基金资助:
    国家自然科学基金(Nos. 20272038, 20072026)资助项目.

Recognition of Neutral Molecules by Single Chiral Arm-Type Molecular Clefts Derived from Deoxycholic Acid

PENG You, MU Qi-Ming, CHEN Zhi-Yong, CHEN Shu-Hua*   

  1. Faculty of Chemistry, Sichuan University, Chengdu 610064
  • Received:2003-07-17 Revised:2003-12-29 Accepted:2004-03-01 Published:2022-09-20

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利用紫外分光光度滴定法测定了新型分子裂缝1～6对于苯胺、对甲氧基苯胺、对硝基苯胺等中性小分子的识别性能.结果表明所有的主体均对考察的客体具有识别作用,形成1:1型的超分子配合物.识别作用的主要推动力为多重氢键、π-π stacking 等的协同作用.讨论了主客体间尺寸/形状、几何互补等因素对形成超分子配合物的影响.并利用1H NMR、计算机模拟作辅助手段对实验结果和现象进行了解释.

关键词: 分子识别, 胆甾, 分子裂缝, 核磁氢谱, 差紫外光谱法

Molecular recognition properties of novel receptors1～6 for aniline, p-methoxyaniline and p-nitroaniline have been investigated by UV-vis spectroscopic titration, which indicates that the supramolecular complexes consist of 1:1 host and guest molecules. The main driving forces are the multiple hydrogen bonding and π-π stacking interaction between host and guest molecules. The molecular recognition ability is discussed from the viewpoint of the size/shape-fit and geometrical complementary relationship. A computer-aided study and 1H NMR spectroscopy have been employed to elucidate the binding behavior of these molecular clefts.

Key words: molecular recognition, cholic acid, molecular cleft, 1H NMR, UV-vis spectral titration