Heteronuclear Double Resonance in NMR Spectroscopy: Relaxation of Multiple Quantum Coherences
Theoretical and experimental investigations of the relaxation rates of multiple-quantum coherences during heteronuclear double resonance (HDR) pulse sequences are presented. Average Liouvillian theory yields analytical expressions to describe the effective relaxation rates of multiple-quantum coherences during HDR irradiation. Experiments were carried out on a C-13-H-1 pair in glycerol to measure the effective auto- and cross-relaxation rates of multiple-quantum coherences during HDR schemes. The experimental results exhibit a very good agreement with theoretical predictions, even when the average Liouvillian expansion is truncated to zeroth order.
Keywords: Endor ; Liouville equation ; NMR spectroscopy ; organic compounds ; Transition Cross-Polarization ; Correlated Time-Modulation ; Isotropic Chemical-Shifts ; Rotating-Frame ; Dispersion Experiments ; Synchronous-Nutation ; Pulse Experiments ; Nmr-Spectroscopy ; Proteins ; Dynamics
Record created on 2009-12-22, modified on 2016-11-15