维普中文期刊产品整合服务

Structural characterizations of protonated homodimers of amino acids:Revealed by infrared multiple photon dissociation(IRMPD) spectroscopy and theoretical calculations

查看全文 作　　者：Lifu [1,2]Ma;Juan [2]Ren;Ruxia [2]Feng;Kailin [1,2]Zhang;Xianglei [2,3]Kong 高影响力作者 机构地区：[1]School of Precision Instrument and Opto-Electronics Engineering, Tianjin University;[2]State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University;[3]Collaborative Innovation Center of Chemical Science and Engineering, Nankai University高影响力机构 出　　处：《Chinese Chemical Letters》索引2018年第29卷第9期,共7页高影响力期刊 基　　金：supported by the National Natural Science Foundation of China(Nos.21475065,21627801 and 11704280) 摘　　要：Infrared multiple photon dissociation(IRMPD) spectroscopic and theoretical studies of protonated homodimers of amino acids generated by electrospray ionization in the gas phase have been reviewed.Results show that proton affinity(PA) may be applied as a probe to predict their structural type: saltbridged or charge-solvated. Proline can be viewed as a reference. For an amino acid with a PA value higher than that of proline, the most stable conformation of its protonated homodimer tends to prefer saltbridged conformation; otherwise, charge-solvated conformation is expected to be the most stable.However, side chain effects may cause the inaccuracy in structural determination due to the strong interactions with the charge, which makes the charge-solvated structure more stable even for species with high PA values. Temperature effect on distribution of different isomers is also very important. In lots of cases, the coexistence of multiple isomers is general, which makes the explanation of an overall IRMPD spectrum difficult. So a statistical view on the distribution of optimized isomers is very helpful. 关 键 词：氨基酸 红外线 结构 多重 分离 光子 光谱学 计算
相关文献

参考文献(61)

引证文献(3)

网站首页 | 关于我们 | 联系我们 | 产品服务 | 客服中心 | 广告服务 | 版权声明 | 网站联盟 | 友情链接 | 售卡网点

版权所有© 渝B2-20050021-1　渝公网安备 50019002500403号　违法和不良信息举报中心

互联网出版许可证 新出网证(渝)字10号 全国400电话 - 免长途话费