申请人:North Carolina State University
公开号:US20170029377A1
公开(公告)日:2017-02-02
Dynamic nuclear polarization (DNP) agents are provided for DNP nuclear magnetic resonance of analytes. The DNP agents can have the structure A-X-L-R, where A is none or an amphiphilic group; X is a coupling group capable of site-specific binding with the analyte or, when A is an amphiphilic group, capable of site-specific binding with the amphiphilic group; L is a bond or a linker group; and R is a poly-radical group. The poly-radical can be a di-radical, a tri-radical, a tetra-radical, or a combination thereof. Methods of NMR measurement of an analyte comprising an NMR-detectable nucleus are provided. The methods can include the steps of providing a frozen sample containing the analyte and a DNP agent; applying radiation having a frequency that excites electron spin transitions in the DNP agent at an intensity to polarize the NMR-detectable nucleus; and detecting a signal from nuclear spin transitions in the NMR-detectable nucleus.
动态核极化(DNP)试剂可用于分析物的DNP核磁共振。DNP试剂可以具有A-X-L-R结构,其中A为无或含有亲水/疏水性的基团;X为能够与分析物或(当A为亲水/疏水性基团时)能够与亲水/疏水性基团特异结合的耦合基团;L为键或连接基团;R为多自由基基团。多自由基可以是双自由基、三自由基、四自由基或其组合。本文提供了一种包含NMR可检测核的分析物的NMR测量方法。该方法可以包括以下步骤:提供包含分析物和DNP试剂的冰冻样品;施加具有激发DNP试剂中电子自旋跃迁频率的辐射,其强度足以极化NMR可检测核;检测NMR可检测核的核自旋跃迁信号。