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首页> 外文期刊>The journal of physical chemistry, B. Condensed matter, materials, surfaces, interfaces & biophysical >Vibrational Relaxation of the Backbone and Base Modes in LacDNA Complexes by UV Resonance Raman Spectroscopy
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Vibrational Relaxation of the Backbone and Base Modes in LacDNA Complexes by UV Resonance Raman Spectroscopy

机译：通过UV共振拉曼光谱法在Lacdna复合物中振动弛豫骨架和基础模式

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Vibrational band shape analysis through time correlation function concept is widely used to obtain experimental information on the molecular dynamics of medium-size molecules in different environments. Interesting details are revealed by extending this technique to biomolecules such as functional groups of the nucleic acids in media approaching the physiological conditions. In this work a study into the UV resonance Raman (UVRR) vibrational half bandwidths of functional groups in LacDNA, upon lowering the pH (pH 6.4, pH 3.45) and in the presence of Min(2+) and Ca2+ ions, respectively, Was of interest. The corresponding global relaxation times have been derived. Also, the 793 cm(-1) UVRR band, corresponding to v (backbone O-P-O, dT) oscillator of LacDNA in aqueous solutions, was selected for band shape-analysis. Vibrational relaxation appears as the dominant relaxation process for this mode, with vibrational dephasing being the most efficient for this oscillator. Current theories, developed for vibrational dephasing have been applied to this profile, and relevant relaxation parameters have been obtained and discussed. To our knowledge this is the first study on DNA oligomers vibrational band shape analysis through time correlation function concept.
机译：通过时间相关函数概念的振动带状分析被广泛用于获得不同环境中型分子的分子动力学的实验信息。通过将该技术扩展到生物分子（例如接近生理条件的培养基中的核酸的官能团），揭示有趣的细节。在这项工作中，在降低pH（pH6.4，pH 3.45）并在Min（2+）和Ca2 +离子存在下，研究LacDNA中uV共振拉曼（UVRR）振动半带宽的研究是出于兴趣。相应的全球放松时间已经得出。此外，选择了793cm（-1）UVRR带，对应于水溶液中LacDNA的V（骨架O-P-O，DT）振荡器，用于带状分析。振动放松表现为这种模式的主导放松过程，具有振动的脱位对于该振荡器最有效。用于振动去除的电流理论已应用于该概况，并且已经获得并讨论了相关的松弛参数。据我们所知，这是通过时间相关功能概念对DNA低聚物振动带形状分析的第一次研究。

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