...
首页> 外文期刊>Physical chemistry chemical physics: PCCP >Mapping gas phase dipeptide motions in the far-infrared and terahertz domain
【24h】

Mapping gas phase dipeptide motions in the far-infrared and terahertz domain

机译:在远红外和太赫兹域中映射气相二肽运动

获取原文
获取原文并翻译 | 示例
           

摘要

Vibrational signatures of Ac-Phe-AA-NH2 dipeptides are recorded and analysed in the far IR/THz spectral domain (100-800 cm(-1), 3-24 THz), with the 'AA' amino acid chosen within the series 'AA' = Gly, Ala, Pro, Cys, Ser, Val. Phe stands for phenylalanine. IR-UV ion dip experiments are conducted on the free electron laser FELIX and combined with DFT-based molecular dynamics simulations for the calculation of the dynamical anharmonic vibrational spectra. The excellent agreements between the experimental and theoretical spectra of the Ac-Phe-AA-NH2 series allow us to make detailed and unambiguous mapping of the vibrational motions into three main domains: 700-800 cm(-1) for C-H waggings, 400-700 cm(-1) for N-H waggings, with a one-to-one signature per amide N-H backbone group, 0-400 cm(-1) for delocalized and large amplitude collective motions over the dipeptide backbone, with backbone torsional motions arising <100 cm(-1).
机译:在远程/ ZHz光谱结构域(100-800cm(-1),3-24至3 Zhz)中记录和分析AC-PHE-AA-NH2二肽的振动签名,并在系列内选择“AA”氨基酸 'aa'= gly,Ala,Pro,Cys,Ser,Val。 PHE代表苯丙氨酸。 IR-UV离子浸渍实验在自由电子激光纤维上进行并结合基于DFT的分子动力学模拟,用于计算动态无谐波振动谱。 AC-PHE-AA-NH2系列的实验和理论光谱之间的良好协议允许我们将振动运动的详细和明确的映射成三个主域:700-800cm(-1)用于CH驱动,400- 700厘米(-1)对于NH摇摆,每个酰胺NH骨架组的一对一签名,0-400厘米(-1)用于多肽骨架上的分层和大振幅集体运动,带有骨干扭转运动< 100厘米(-1)。

著录项

  • 来源
  • 作者单位

    Univ Evry Val dEssonne LAMBE CNRS UMR8587 Blvd F Mitterrand Bat Maupertuis F-91025 Evry France;

    Radboud Univ Nijmegen Inst Mol &

    Mat FELIX Lab Toernooiveld 7c NL-6525 ED Nijmegen Netherlands;

    Radboud Univ Nijmegen Inst Mol &

    Mat FELIX Lab Toernooiveld 7c NL-6525 ED Nijmegen Netherlands;

    Radboud Univ Nijmegen Inst Mol &

    Mat FELIX Lab Toernooiveld 7c NL-6525 ED Nijmegen Netherlands;

    Univ Evry Val dEssonne LAMBE CNRS UMR8587 Blvd F Mitterrand Bat Maupertuis F-91025 Evry France;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 物理学;化学;
  • 关键词

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