氘化对玻璃化基质中 13C 动态核极化的影响。
Influence of deuteration in the glassing matrix on 13C dynamic nuclear polarization.
机构信息
Advanced Imaging Research Center, University of Texas Southwestern Medical Center, Dallas, Texas 75390-8568, USA.
出版信息
Phys Chem Chem Phys. 2013 May 21;15(19):7032-5. doi: 10.1039/c3cp50750e.
Abstract
Replacement of protons by deuterons in the glassing solvents led to 2-3-fold improvement of the (13)C dynamic nuclear polarization (DNP) solid-state NMR signal for samples doped with large electron spin resonance (ESR) linewidth free radicals galvinoxyl, DPPH, and 4-oxo-TEMPO. Meanwhile, the reverse effect is observed for (13)C DNP using small ESR linewidth free radicals BDPA and trityl OX063.
摘要
在玻璃化溶剂中用氘取代质子，可使掺杂大电子顺磁共振（ESR）线宽自由基加敏灵、DPPH 和 4-氧-TEMPO 的样品的（13）C 动态核极化（DNP）固态 NMR 信号提高 2-3 倍。同时，对于使用小 ESR 线宽自由基 BDPA 和三苯基 OX063 的（13）C DNP，观察到相反的效果。
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