| 紫外光谱法研究环糊精／精噁唑禾草灵超分子复合体 |
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| 引用本文： | 张安平,罗凡,刘维屏.紫外光谱法研究环糊精／精噁唑禾草灵超分子复合体[J].光谱学与光谱分析,2006,26(12):2298-2301. |
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| 作者姓名： | 张安平 罗凡 刘维屏 |
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| 作者单位： | [1]浙江大学环境科学研究所,浙江杭州310029 [2]浙江工业大学生物与环境工程学院,绿色手性研究中心,浙江杭州310032 |
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| 基金项目： | 国家杰出青年基金项目（20225721）和国家重点基础发展规划（“973”）项目（2003CB114400）资助 |
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| 摘 要： | 采用紫外光谱法研究了β-环糊精（β-CD）、羟丙基-β-环糊精（HP-β-CD）和部分甲基化β-环糊精（RAMEB）与精噁唑禾草灵（FE-p）间的超分子作用。在体积比为1：4的乙醇水溶剂中，在298.15～318.15K的温度范围内，3种环糊精均能与FE-p形成稳定的1：1型的超分子复合体，其结合常数值大小依次是KRAMEB〉KHP-βCD〉KβCD，且随着温度的升高而降低。经过计算，热力学参数AG，△H和△S均为负值，说明结合反应是放热反应且能自发进行，焓变是形成超分子复合体的主要驱动力，符合熵焓补偿效应。
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| 关 键 词： | 环糊精 精噁唑禾草灵 超分子复合体 紫外光谱法 |
| 文章编号： | 1000-0593（2006）12-2298-04 |
| 收稿时间： | 2005-09-08 |
| 修稿时间： | 2005-11-28 |
Study on Supramolecular Complexes of Cyclodextrins and Fenoxaprop-p- Ethyl by UV Spectra |
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| ZHANG An-ping , LUO Fan , LIU Wei-ping.Study on Supramolecular Complexes of Cyclodextrins and Fenoxaprop-p- Ethyl by UV Spectra[J].Spectroscopy and Spectral Analysis,2006,26(12):2298-2301. |
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| Authors: | ZHANG An-ping LUO Fan LIU Wei-ping |
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| Abstract: | The supramolecular complexes of fenoxaprop-p-ethyl and various cyclodextrins (beta-CD, HP-beta-CD, RAMEB) were studied by UV spectra technique. The results showed that all cyclodextrins could form 1:1 inclusion complexes with fenoxaprop-p-ethyl in ethanol-water (the volume ratio of ethanol to water was 1 : 4), and the binding constants of the three types of cyclodextrins toward fenoxaprop-p-ethyl were in the order of KRAEB>KHP-beta-CD>Kbeta-CD. Between 298. 15 and 318. 15 K, the binding constants decreased with temperature increasing. The Gibbs free energy deltaG, enthalpy change deltaH, and entropy change deltaS determined were all negative, suggesting that the inclusion complexation is exothermic and can spontaneously occur by the balance of enthalpy driving and entropy opposing. |
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| Keywords: | Cyclodextrins Fenoxaprop-p-ethyl Supramolecular complexes UV spectra |
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