Rotational-echo double resonance of uniformly labeled 13C clusters
Rotational-echo double resonance of uniformly labeled 13C clusters
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DOI：
10.1016/s1090-7807(03)00077-6
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发表时间：
2003-07-01
影响因子：
2.2
通讯作者：
Schaefer, J
中科院分区：
文献类型：
--
作者：
Mehta, AK;Schaefer, J
如果C-13化学位移和同型C-13-C-13各向同性J相互作用通过转子同步C-13 pi和pi/2脉冲的组合重新聚焦，则使用旋转回波双共振NMR测量从所观察到的C-13自旋的紧密耦合簇到远处的N-15、P-31或F-19的距离是实用的。该方案通过对稀释和重结晶的L-[C-13（3），N-15]丙氨酸和L-[C-13（6），α-N-15]组氨酸进行的实验来说明。(C)2003 Elsevier Science（美国）。All rights reserved.
The use of rotational-echo double resonance NMR to measure distances from an observed tightly coupled cluster of C-13 spins to a distant N-15, P-31, or F-19 is practical if C-13 chemical shifts and homonuclear C-13-C-13 isotropic J interactions are refocused by a combination of rotor-synchronized C-13 pi and pi/2 pulses. This scheme is illustrated by experiments performed on diluted and recrystallized L-[C-13(3),N-15]alanine and L-[C-13(6),alpha-N-15]histidine. (C) 2003 Elsevier Science (USA). All rights reserved.