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Single-transition-to-single-transition coherence transfer by cross-polarization: quantitation of cross-correlation effects in NMR
Single-transition-to-single-transition coherence transfer by cross-polarization: quantitation of cross-correlation effects in NMR
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机译：交叉极化从单跃迁到单跃迁的相干转移：NMR中互相关效应的定量
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摘要
A method of NMR spectroscopy for achieving selective single-transition-to-single-transition cross-polarization (ST-CP) between two selected transitions in systems with two or more coupled spins comprises the following steps:1) Choose RF pulses suitably shaped for a selective excitation experiment with an RF amplitude that is weaker than the scalar coupling constant JIS of the I and S spin systems;2) Simultaneously stimulate a pair of connected transitions of the I and S spin systems;3) Record the response for the said selective excitation experiment and observe different pairs of connected transitions.;The method proposed is quite general provided the selectivity is sufficient to consider the relevant three-level subsystem to be isolated from all other energy levels. The method will be particularly useful to study differential relaxation of different multiplet components.
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