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Spin‐1 Double Quantum Spectroscopy in the Isotropic Phase: INADEQUATE Spectra of 2 H, 2 H and 6 Li, 6 Li AX Spin Systems
Author(s) -
Chandrakumar Narayanan,
Mons HansEgbert,
Hüls Dietmar,
Günther Harald
Publication year - 1996
Publication title -
magnetic resonance in chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.483
H-Index - 72
eISSN - 1097-458X
pISSN - 0749-1581
DOI - 10.1002/(sici)1097-458x(199609)34:9<715::aid-omr954>3.0.co;2-c
Subject(s) - chemistry , spin (aerodynamics) , quantum , isotropy , molecular physics , condensed matter physics , nuclear magnetic resonance , physics , quantum mechanics , thermodynamics
A density matrix treatment is presented which describes the main features of INADEQUATE experiments for spin‐1 AX spin systems. It is shown that apart from two‐spin double quantum peaks, which carry correlation information, one‐spin double quantum peaks are to be expected. In the latter, homoculear spin–spin coupling is amplified in the F 1 domain where the signal splitting amounts to 4 J . The theoretical predictions are verified for the 2 H, 2 H AX system of 3,3′‐[D 2 ]norcamphor. In addition, experimental results for a 6 Li, 6 Li A 2 X 2 or AA′XX′ spin system are presented and the influence of spin–lattice relaxation on the relative intensity of the one‐spin double quantum peaks for 6 Li, 6 Li experiments is demonstrated.