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Probing spatial distribution of alignment by deuterium NMR imaging

机译:通过氘核磁共振成像探测比对的空间分布

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Deuterium NMR imaging was used to evaluate the spatial distribution of the degree of alignment in different types of alignment media by monitoring the deuterium quadrupolar splitting using spatially resolved NMR techniques in conventional liquid state NMR instruments. These images allow the unambiguous distinction of magnetic field and alignment inhomogeneities present in partially aligned samples, revealing the underlying reasons for linebroadening within an alignment medium that cannot be explained by the sole analysis of 1D ~2HNMR spectra. For example, alignment inhomogeneities due to broken gels or the presence of concentration gradients in liquid crystalline solutions are clearly detected by the imaging methods proposed in this work.
机译:通过使用常规液相NMR仪器中的空间分辨NMR技术监测氘四极分裂,使用氘核磁共振成像来评估不同类型的取向介质中取向度的空间分布。这些图像可以清楚地区分部分对准的样品中存在的磁场和对准不均匀性,从而揭示了对准介质中线变宽的根本原因,这是无法通过一维2HNMR光谱的唯一分析来解释的。例如,通过这项工作中提出的成像方法,可以清楚地检测到由于凝胶破裂或液晶溶液中存在浓度梯度而导致的取向不均匀性。

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