Cryogenic sample exchange NMR probe for magic angle spinning dynamic nuclear polarization.

Cryogenic sample exchange NMR probe for magic angle spinning dynamic nuclear polarization.
复制标题

DOI:
10.1016/j.jmr.2009.03.003
复制
发表时间:
2009-06
期刊:
Journal of magnetic resonance (San Diego, Calif. : 1997)
影响因子:
--
通讯作者:
Griffin RG
Griffin RG
中科院分区:
其他
文献类型:
--
作者:
Barnes AB;Mak-Jurkauskas ML;Matsuki Y;Bajaj VS;van der Wel PC;Derocher R;Bryant J;Sirigiri JR;Temkin RJ;Lugtenburg J;Herzfeld J;Griffin RG

文献摘要

参考文献

被引文献

相似文献

我们描述了一种低温样品交换系统,该系统通过减少更换样品所需的时间和提高仪器的长期稳定性,显着提高了魔角旋转(MAS)动态核极化(DNP)实验的效率。传统低温 MAS DNP/NMR 实验中更换样品需要将探头加热至室温,断开所有低温、射频和微波连接,从磁体上取下探头,更换样品,然后反转之前的所有步骤,整个周期需要几个小时。这里描述的样品交换系统——依赖于连接到 MAS 定子前部的喷射管和带有波纹管孔的真空夹套杜瓦瓶——绕过了这些程序。为了证明这种四重共振样品交换探针具有出色的灵敏度、分辨率和稳定性,我们对膜蛋白细菌视紫红质的活性位点进行了高精度距离测量。我们还包括三肽 N-f-MLF-OH 在 100 K 下的光谱,显示 30 Hz 线宽。
We describe a cryogenic sample exchange system that dramatically improves the efficiency of magic angle spinning (MAS) dynamic nuclear polarization (DNP) experiments by reducing the time required to change samples and by improving long-term instrument stability. Changing samples in conventional cryogenic MAS DNP/NMR experiments involves warming the probe to room temperature, detaching all cryogenic, RF, and microwave connections, removing the probe from the magnet, replacing the sample, and reversing all the previous steps, with the entire cycle requiring a few hours. The sample exchange system described here — which relies on an eject pipe attached to the front of the MAS stator and a vacuum jacketed dewar with a bellowed hole — circumvents these procedures. To demonstrate the excellent sensitivity, resolution, and stability achieved with this quadruple resonance sample exchange probe, we have performed high precision distance measurements on the active site of the membrane protein bacteriorhodopsin. We also include a spectrum of the tripeptide N-f-MLF-OH at 100 K which shows 30 Hz linewidths.
DOI: 10.1007/s00723-008-0129-1
发表时间: 2008-08
影响因子: 1
作者:
Barnes, A. B.;De Paepe, G.;van der Wel, P. C. A.;Hu, K. -N.;Joo, C. -G.;Bajaj, V. S.;Mak-Jurkauskas, M. L.;Sirigiri, J. R.;Herzfeld, J.;Temkin, R. J.;Griffin, R. G.
通讯作者: Griffin, R. G.
DOI: 10.1021/ja00101a042
发表时间: 1994-11-02
影响因子: 15
作者:
GRIFFITHS, JM;LAKSHMI, KV;GRIFFIN, RG
通讯作者: GRIFFIN, RG
DOI: 10.1063/1.470372
发表时间: 1995-10-22
影响因子: 4.4
作者:
BENNETT, AE;RIENSTRA, CM;GRIFFIN, RG
通讯作者: GRIFFIN, RG
DOI: 10.1021/ja0626685
发表时间: 2006-08-23
影响因子: 15
作者:
van der Wel, Patrick C. A.;Hu, Kan-Nian;Griffin, Robert G.
通讯作者: Griffin, Robert G.
DOI: 10.1021/ja039749a
发表时间: 2004-09-08
影响因子: 15
作者:
Hu, KN;Yu, HH;Griffin, RG
通讯作者: Griffin, RG