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本文引用的文献

1
Obtaining absorptive line shapes in two-dimensional infrared vibrational correlation spectra.在二维红外振动相关光谱中获取吸收线形状。
Phys Rev Lett. 2003 Jan 31;90(4):047401. doi: 10.1103/PhysRevLett.90.047401. Epub 2003 Jan 30.
2
Two-dimensional infrared spectroscopy: a promising new method for the time resolution of structures.二维红外光谱法：一种用于结构时间分辨的有前景的新方法。
Curr Opin Struct Biol. 2001 Oct;11(5):516-22. doi: 10.1016/s0959-440x(00)00243-8.
3
Conformational preferences and vibrational frequency distributions of short peptides in relation to multidimensional infrared spectroscopy.短肽的构象偏好与振动频率分布及其与多维红外光谱的关系
J Am Chem Soc. 2001 Dec 26;123(51):12886-98. doi: 10.1021/ja011088z.
4
Two-dimensional IR spectroscopy can be designed to eliminate the diagonal peaks and expose only the crosspeaks needed for structure determination.二维红外光谱可以设计成消除对角峰，仅显示结构测定所需的交叉峰。
Proc Natl Acad Sci U S A. 2001 Sep 25;98(20):11265-70. doi: 10.1073/pnas.201412998. Epub 2001 Sep 18.
5
Signatures of beta-peptide unfolding in two-dimensional vibrational echo spectroscopy: a simulation study.二维振动回声光谱中β-肽解折叠的特征：一项模拟研究。
J Am Chem Soc. 2001 Apr 4;123(13):3114-24. doi: 10.1021/ja003412g.
6
Vibrational anharmonicities revealed by coherent two-dimensional infrared spectroscopy.相干二维红外光谱揭示的振动非谐性
Phys Rev Lett. 2001 Mar 5;86(10):2154-7. doi: 10.1103/PhysRevLett.86.2154.
7
Two-dimensional infrared spectroscopy of peptides by phase-controlled femtosecond vibrational photon echoes.通过相位控制的飞秒振动光子回波对肽进行二维红外光谱分析。
Proc Natl Acad Sci U S A. 2000 Jul 18;97(15):8219-24. doi: 10.1073/pnas.140227997.
8
The two-dimensional IR nonlinear spectroscopy of a cyclic penta-peptide in relation to its three-dimensional structure.一种环状五肽的二维红外非线性光谱与其三维结构的关系。
Proc Natl Acad Sci U S A. 1999 Mar 2;96(5):2036-41. doi: 10.1073/pnas.96.5.2036.
9
Vibrational spectroscopy and conformation of peptides, polypeptides, and proteins.肽、多肽和蛋白质的振动光谱与构象
Adv Protein Chem. 1986;38:181-364. doi: 10.1016/s0065-3233(08)60528-8.

肽键的双频二维红外光谱外差光子回波

Dual-frequency 2D-IR spectroscopy heterodyned photon echo of the peptide bond.

作者信息

Rubtsov Igor V, Wang Jianping, Hochstrasser Robin M

机构信息

Department of Chemistry, University of Pennsylvania, Philadelphia, PA 19104-6323, USA.

出版信息

Proc Natl Acad Sci U S A. 2003 May 13;100(10):5601-6. doi: 10.1073/pnas.0931292100. Epub 2003 Apr 22.

DOI:10.1073/pnas.0931292100
PMID:12709595
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC156247/
Abstract

The structure fluctuations of the peptide bond interacting with solvent are examined through the coupling and correlations of the frequency distributions of amide I and amide II transitions. The fluctuations of the two modes are anticorrelated as a result of the solvent-induced changes in the mixing of the dominant valence-bond structures of the peptide. Significant anharmonic coupling of the two modes is seen. The results are the application of a new approach to two-dimensional infrared (2D-IR) spectroscopy in which the pulse sequences used to produce the vibrational echoes incorporate two frequencies. This dual-frequency arrangement greatly extends the capabilities of 2D-IR spectroscopy by allowing the coupling between widely separated modes to be characterized in analogy with heteronuclear NMR. The experiment exposes the cross peaks, representing the mode coupling, free of the interference of the strong diagonal peaks that typically dominate 2D-IR spectroscopy. The alignment and dephasing of coupled transitions, in this example the amide I and amide II transition dipoles, is also determined by these experiments.

摘要

通过酰胺I和酰胺II跃迁频率分布的耦合与相关性，研究了与溶剂相互作用的肽键的结构波动。由于溶剂引起的肽的主要价键结构混合变化，这两种模式的波动呈反相关。可以看到这两种模式存在显著的非谐耦合。这些结果是一种二维红外（2D-IR）光谱新方法的应用，其中用于产生振动回波的脉冲序列包含两个频率。这种双频配置通过允许以类似于异核NMR的方式表征广泛分离模式之间的耦合，极大地扩展了二维红外光谱的能力。该实验揭示了代表模式耦合的交叉峰，而没有通常主导二维红外光谱的强对角峰的干扰。在此示例中，耦合跃迁（即酰胺I和酰胺II跃迁偶极矩）的排列和去相也由这些实验确定。