INEPT Experiments Involving Quadrupolar Nuclei in Solids
作者： Hsien-Ming Kao , Clare P Grey
关键词: Dipole 、 Atomic physics 、 Nuclear magnetic resonance 、 J-coupling 、 Density matrix 、 Coherence (physics) 、 Chemistry 、 Nuclear and High Energy Physics 、 Biophysics 、 Biochemistry 、 Condensed matter physics
摘要: Abstract Coherence transfer from quadrupolar 27 Al ( I = 5 2 ) nuclei to 31 P 1 via INEPT experiments is investigated. → on a (CH 3 P–AlCl complex in zeolite NaX are performed, and the results demonstrate that signals strongly depend whether or not pulses applied synchronously with rotor period, length of pulses. A density-matrix calculation involving use spin operators for has been performed help understand evolution behavior density matrix under influence interaction, dipolar J -couplings, pulse lengths nuclei. The theoretical predictions obtained these calculations consistent experimental observations.
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