It is shown that in nuclear magnetic resonance, multiple-quantum (MQ) coherences can be detected “instantly” by exploiting the principle of quantum-mechanical projective measurement. Therefore, the mixing period, which involves collective multispin dynamics and converts MQ coherences into observable single-quantum coherence (magnetization), is not necessary. The experimental examples are given for two finite clusters: benzene in liquid crystal and liquid crystal -pentyl-4-cyanobiphenyl, and for solid adamantane with an infinite network of dipolar couplings.
REFERENCES
1.
R. R.
Ernst
, G.
Bodenhausen
, and A.
Wokaun
, Principles of Nuclear Magnetic Resonance in One and Two Dimensions
(Clarendon
, Oxford
, 1987
).2.
W. S.
Warren
, S.
Sinton
, D. P.
Weitekamp
, and A.
Pines
, Phys. Rev. Lett.
43
, 1791
(1979
).3.
W. S.
Warren
and A.
Pines
, J. Chem. Phys.
74
, 2808
(1981
).4.
Y.
Yen
and A.
Pines
, J. Chem. Phys.
78
, 3579
(1983
).5.
J.
Baum
, M.
Munowitz
, A. N.
Garroway
, and A.
Pines
, J. Chem. Phys.
83
, 2015
(1985
).6.
7.
J.-S.
Lee
and A. K.
Khitrin
, Appl. Phys. Lett.
89
, 074105
(2006
).8.
© 2006 American Institute of Physics.
2006
American Institute of Physics
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