2D IRphoton echo of azido-probes for biomolecular dynamics

文献情報

出版日 2010-12-02

DOI 10.1039/C0CP01625J

インパクトファクター 3.676

著者

Matthew J. Tucker, Xin Sonia Gai, Edward E. Fenlon, Scott H. Brewer, Robin M. Hochstrasser

原文を見る

要旨

The vibrations in the azido-, N3, asymmetric stretching region of 2′-azido-2′-deoxyuridine (N3dU) are examined by two-dimensional infrared spectroscopy. In water and tetrahydrofuran (THF), the spectra display a single sharp diagonal peak that shows solvent sensitivity. The frequency–frequency correlation time in water is 1.5 ps, consistent with H-bond making and breaking dynamics. The 2D IR spectrum is reproduced for N3dU in water based on a model correlation function and known linear response functions. Its large extinction coefficient, vibrational frequency outside the protein and nucleic acid IR absorption, and sensitivity to water dynamics render –N3 a very useful probe for 2D IR and other nonlinear IR studies: its signal is ca. 100 times that of nitriles.

掲載誌

Physical Chemistry Chemical Physics

CiteScore: 5.5

自己引用率: 10.3%

年間論文数: 3036

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