申请人:Ohio State Innovation Foundation
公开号:US20210179581A1
公开(公告)日:2021-06-17
Disclosed are methods for performing dynamic nuclear polarization using the polarizing agents described herein. In general, the methods involve (a) providing a frozen sample in a magnetic field, wherein the frozen sample includes a polarizing agent described herein and an analyte with at least one spin half nucleus; (b) polarizing the at least one spin half nucleus of the analyte by irradiating the frozen sample with radiation having a frequency that excites electron spin transitions in the polarizing agent; (c) optionally melting the sample to produce a molten sample; and (d) detecting nuclear spin transitions in the at least one spin half nucleus of the analyte in the frozen or molten sample. In certain embodiments, the polarizing agents can be peptide-based. In these embodiments, the polarizing agents can be readily prepared by solid-phase peptide synthesis.
本发明涉及使用所述极化剂进行动态核极化的方法。一般来说,该方法包括:(a)在磁场中提供一个冷冻样品,其中冷冻样品包括所述极化剂和至少一个自旋半整数核的分析物;(b)通过照射具有激发极化剂电子自旋跃迁频率的辐射来极化分析物的至少一个自旋半整数核;(c)可选地融化样品以产生熔融样品;以及(d)在冷冻或熔融样品中检测分析物的至少一个自旋半整数核的核自旋跃迁。在某些实施例中,极化剂可以是基于肽的。在这些实施例中,可以通过固相肽合成轻松制备极化剂。