HIGH-FREQUENCY (140 GHZ) DYNAMIC NUCLEAR-POLARIZATION - POLARIZATION TRANSFER TO A SOLUTE IN FROZEN AQUEOUS-SOLUTION

被引：155
|
作者：
GERFEN, GJ
BECERRA, LR
HALL, DA
GRIFFIN, RG
TEMKIN, RJ
SINGEL, DJ
机构：
[1] MIT,FRANCIS BITTER NATL MAGNET LAB,CAMBRIDGE,MA 02139
[2] MIT,DEPT CHEM,CAMBRIDGE,MA 02139
[3] MIT,CTR PLASMA FUS,CAMBRIDGE,MA 02139
[4] MONTANA STATE UNIV,DEPT CHEM,BOZEMAN,MT 59717
来源：
JOURNAL OF CHEMICAL PHYSICS | 1995年 / 102卷 / 24期
关键词：
D O I：
10.1063/1.468818
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Dynamic nuclear polarization (DNP) transfers the large polarization of unpaired electrons to nuclei and thus significantly enhances the signal strength in nuclear magnetic resonance (NMR) spectroscopy. High frequency/field (140 GHz/5 T) DNP has been implemented in solid state NMR experiments using a nitroxide radical as the paramagnetic polarizing agent in a watenglycerol frozen solution. The 1H and 13C NMR signal strengths of both the solvent and an amino acid solute have been enhanced by a factor of 185, which represents a reduction of >102 in sample size requirements or >104 in signal acquisition time. © 1995 American Institute of Physics.
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收藏
页码：9494 / 9497
页数：4
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