Department of Chemistry, University of Konstanz, 78457 Konstanz, Germany.
J Magn Reson. 2011 Jan;208(1):167-70. doi: 10.1016/j.jmr.2010.10.005. Epub 2010 Nov 1.
In electron paramagnetic resonance (EPR) distance distributions between site-directedly attached spin labels in soft matter are obtained by measuring their dipole-dipole interaction. The analysis of these distance distributions can be misleading particularly for broad distributions, because the most probable distance deviates from the distance between the most probable label positions. The current manuscript studies this effect using numerically generated spin label positions, molecular dynamics simulations, and experimental data of a model system. An approach involving Rice distributions is proposed to overcome this problem.
在电子顺磁共振（EPR）中，可以通过测量其偶极-偶极相互作用来获得在软物质中局域化的自旋标记之间的距离分布。这些距离分布的分析可能会产生误导，特别是对于较宽的分布，因为最可能的距离偏离了最可能的标记位置之间的距离。本文使用数值生成的自旋标记位置、分子动力学模拟和模型系统的实验数据研究了这种效应。提出了一种涉及 Rice 分布的方法来克服这个问题。
