| 1H NMR研究溶质浓度对三碳多元醇水溶液氢键作用以及玻璃化的影响 |
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| 引用本文： | 叶斌,高才,赵韩,陈开松,杨锁,刘向农.1H NMR研究溶质浓度对三碳多元醇水溶液氢键作用以及玻璃化的影响[J].物理化学学报,2011,27(11):2505-2511. |
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| 作者姓名： | 叶斌 高才 赵韩 陈开松 杨锁 刘向农 |
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| 作者单位： | School of Mechanical and Automotive Engineering, Hefei University of Technology, Hefei 230009, P. R. China |
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| 基金项目： | 国家自然科学基金，安徽省自然科学基金 |
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| 摘 要： | 为考察溶质浓度对三碳多元醇水溶液氢键作用以及不同物质玻璃态形成能力的影响,采用1H NMR外标法研究不同浓度的1-丙醇（NPA）,2-丙醇（IPA）,1,2-丙二醇（PG）,1,3-丙二醇（PD）和丙三醇（glycerol）的水溶液在室温常压下质子化学位移.结果表明:具有CH3CH（OH）一基团的PG烷基质子的化学位移变化趋势与其他几种醇相比有较大差异.醇羟基质子与水分子的氧形成较强O-H…O氢键.相同摩尔分数下,羟基数的增加导致水质子和羟基质子的化学位移降低,而且羟基位置不同也会导致水质子和羟基质子化学位移差异.这几种三碳多元醇碱性强弱的顺序和降低冰的均相成核温度能力的顺序一致,即glycerol>PG>PD>IPA>NPA,1H NMR技术表明glycerol和PG更适合用作低温保护剂.
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| 关 键 词： | 1H NMR 三碳多元醇 水溶液 低温保护剂 质子化学位移 氢键 |
| 收稿时间： | 2011-06-02 |
| 修稿时间： | 2011-08-29 |
1H NMR Investigation on Effect of Solute Concentration on the Hydrogen Bonding and Glass Transition of Three-Carbon Polyalcohol Aqueous Solutions |
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| YE Bin,GAO Cai,ZHAO Han,CHEN Kai-Song,YANG Suo,LIU Xiang-Nong.1H NMR Investigation on Effect of Solute Concentration on the Hydrogen Bonding and Glass Transition of Three-Carbon Polyalcohol Aqueous Solutions[J].Acta Physico-Chimica Sinica,2011,27(11):2505-2511. |
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| Authors: | YE Bin GAO Cai ZHAO Han CHEN Kai-Song YANG Suo LIU Xiang-Nong |
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| Institution: | School of Mechanical and Automotive Engineering, Hefei University of Technology, Hefei 230009, P. R. China |
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| Abstract: | We investigated the effects of solute concentration on the hydrogen bonding interactions of three-carbon polyalcohol aqueous solutions.In order to inspect the capacity of the solutions to form glass, proton nuclear magnetic resonance(~1H NMR) chemical shifts were determined in binary mixtures of water and 1-propanol(NPA),2-propanol(IPA),1,2-propanediol(PG),1,3-propanediol(PD),and glycerol at room temperature and at atmospheric pressure using the external reference method.We found that the alkyl proton chemi... |
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| Keywords: | ~1H nuclear magnetic resonance Three-carbon polyalcohol Aqueous solution Cryoprotective agent Proton chemical shift Hydrogen bonding |
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