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首页> 外文期刊>Annual Review of Physical Chemistry >Measuring Electric Fields in Biological Matter Using the Vibrational Stark Effect of Nitrile Probes
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Measuring Electric Fields in Biological Matter Using the Vibrational Stark Effect of Nitrile Probes

机译：使用丁腈探针的振动颗粒作用测量生物物质中的电场

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摘要

Measurement of the electrostatic interactions that give rise to biological functions has been a longstanding challenge in biophysics. Advances in spectroscopic techniques over the past two decades have allowed for the direct measurement of electric fields in a wide variety of biological molecules and systems via the vibrational Stark effect (VSE). The frequency of the nitrile stretching oscillation has received much attention as an electric field reporter because of its sensitivity to electric fields and its occurrence in a relatively transparent region of the infrared spectrum. Despite these advantages and its wide use as a VSE probe, the nitrile stretching frequency is sensitive to hydrogen bonding in a way that complicates the straightforward relationship between measured frequency and environmental electric field. Here we highlight recent applications of nitrile VSE probes with an emphasis on experiments that have helped shape our understanding of the determinants of nitrile frequencies in both hydrogen bonding and nonhydrogen bonding environments.
机译：测量产生生物学功能的静电相互作用是生物物理学的长期挑战。过去二十年的光谱技术的进展已经允许通过振动术（VSE）直接测量各种生物分子和系统中的电场。由于其对红外光谱的相对透明区域的敏感性，丁腈拉伸振荡的频率被作为电场报告称为电场报告机。尽管有这些优点及其广泛的用途作为VSE探针，但腈拉伸频率对氢键相比敏感，以使测量频率和环境电场之间的直接关系复杂化。在这里，我们突出了最近的腈VSE探针的应用，重点是有助于改变我们对氢粘合剂和非氢粘合环境中腈频率的决定因素的实验。

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