...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >The Lithium Cation Binding Energies of Gaseous Amino Acids
【24h】

The Lithium Cation Binding Energies of Gaseous Amino Acids

机译：气态氨基酸的锂阳离子结合能

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The lithium cation binding energies of 15 of the common amino acids were determined via the kinetic method in a quadrupole ion trap mass spectrometer. Values were obtained in two ways. First, a ladder of relative lithium cation binding energies was developed from pairwise comparisons of the amino acids. Second, values were determined by comparison to a pair of simple reference compounds, dimethoxyethane and diethoxyethane. The values from the two approaches are in good accord. The scale from glycine to glutamic acid spans a range from 41.6 to 52.9 kcal/mol. The present values for lithium cations have been compared to those obtained by others previously for sodium, copper, and silver cations. These comparisons suggest that the alkali metals have exalted binding energies for amino acids with side chains that include oxygen-bearing functional groups (i.e., alcohols and carboxylic acids) whereas the transition metals have enhanced binding energies for amino acids with side chains that include sulfur-bearing or aromatic functional groups. This analysis is in accord with the principles of hard-soft acid/base behavior.
机译：通过动力学方法在四极离子阱质谱仪中测定了15种常见氨基酸的锂阳离子结合能。通过两种方式获得值。首先，从氨基酸的成对比较中得出了相对锂阳离子结合能的阶梯。其次，通过与一对简单的参考化合物二甲氧基乙烷和二乙氧基乙烷进行比较来确定值。两种方法的值非常吻合。从甘氨酸到谷氨酸的比例范围为41.6至52.9kcal / mol。已将锂阳离子的当前值与以前其他人对钠，铜和银阳离子获得的值进行了比较。这些比较表明，碱金属对带有含氧官能团（即醇和羧酸）的侧链氨基酸的结合能更高，而过渡金属对带有硫-侧链的氨基酸的结合能更高。带有或带有芳香族官能团的基团。该分析符合硬-软酸/碱行为的原理。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号