DIRECT DETERMINATION OF RATE CONSTANTS OF SLOW DYNAMIC PROCESSES BY TWO-DIMENSIONAL ACCORDION SPECTROSCOPY IN NUCLEAR MAGNETIC-RESONANCE
DIRECT DETERMINATION OF RATE CONSTANTS OF SLOW DYNAMIC PROCESSES BY TWO-DIMENSIONAL ACCORDION SPECTROSCOPY IN NUCLEAR MAGNETIC-RESONANCE
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DOI：
10.1021/ja00369a027
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发表时间：
1982-01-01
影响因子：
15
通讯作者：
ERNST, RR
中科院分区：
文献类型：
--
作者：
BODENHAUSEN, G;ERNST, RR
一类新的NMR实验，基于三个时间变量的系统变化，允许boththe交换网络的识别和相应的速率常数的直接测量。从二维光谱采取的横截面的线性组合允许通过识别正常模式的nonexponentialrecovery行为的一个简单的分析。由此产生的洛伦兹线形状的线宽提供了各种动态过程的速率常数的直接测量，如化学交换，瞬态Overhauser效应，和自旋晶格弛豫。
A novel class of NMR experiments, based on the systematic variation of three time variables, permits boththe identification of exchange networks and the direct measurement of the corresponding rate constants. Linear combinations of cross sections taken from two-dimensionalspectra allow a straightforward analysis of nonexponentialrecovery behavior by identifying normal modes. The linewidths of the resulting Lorentzian line shapes provide a direct measure of the rate constants of various dynamic processes, such as chemical exchange, transient Overhauser effects, and spin-lattice relaxation.