| 相对化学位移值：获得CH基团中氢原子精确化学位移值的一种简单方法 |
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| 引用本文： | 张荣,李俊,吴文娟.相对化学位移值：获得CH基团中氢原子精确化学位移值的一种简单方法[J].化学物理学报,2014,27(2):240-242. |
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| 作者姓名： | 张荣 李俊 吴文娟 |
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| 作者单位： | 广东药学院药科学院物理化学教研室，广州510006;广东第二师范学院化学系，广州510303;广东药学院药科学院物理化学教研室，广州510006 |
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| 摘 要： | 为了解决CH基团中氢原子的精确化学位移值的问题，引入相对化学位移值概念．内标法和外标法用于测量全浓度范围的N-甲基乙酰胺水溶液．对于同一个分子来说，选择分子内某个基团的氢原子化
学位移作为一个标准值，得到的其它基团氢原子相对化学位移值随温度和浓度的变化是和测试方法无关的．
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| 关 键 词： | 相对化学位移值，CH基团，内标法和外标法 |
| 收稿时间： | 9/4/2013 12:00:00 AM |
Relative Chemical Shifts for Obtaining Accurate Chemical Shifts of Hydrogen Atoms in CH Groups |
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| Rong Zhang,Jun Li and Wen-juan Wu.Relative Chemical Shifts for Obtaining Accurate Chemical Shifts of Hydrogen Atoms in CH Groups[J].Chinese Journal of Chemical Physics,2014,27(2):240-242. |
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| Authors: | Rong Zhang Jun Li and Wen-juan Wu |
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| Institution: | College of Pharmacy, Guangdong Pharmaceutical University, Guangzhou 510006, China;Department of Chemistry, Guangdong University of Education, Guangzhou 510303, China;College of Pharmacy, Guangdong Pharmaceutical University, Guangzhou 510006, China |
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| Abstract: | Accurate chemical shifts of hydrogen atoms in CH groups are difficult to obtain. To solve this problem, relative chemical shifts are introduced. Internal and external standard methods were used to measure the chemical shifts in a whole-concentration of N-methylacetamide-water system. Determination of the chemical shifts of hydrogen atoms, especially those of CH groups, according to the two methods yielded significant differences. Relative chemical shifts were proven to be independent of the reference and may be applied to other systems. |
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| Keywords: | Relative chemical shift CH group Internal and external method |
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