Method for increasing resolution in solid-state NMR spectra of abundant nuclei
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United States of America Patent
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Jul 20, 1993
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N/A
app pub date -
Jan 17, 1991
filing date -
Jan 17, 1991
priority date (Note) -
Expired
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Abstract
A multiple-pulse RF pulse sequence reduces homonuclear dipolar coupling more efficiently relative to other known pulse sequences and is relatively insensitive to inhomogeneous RF fields, pulse imperfections and transmitter misadjustments so that it can be used on less sophisticated instruments and does not require long setup times. The inventive RF pulse sequence is constructed from selected sets of known six-pulse cycles called dipolar decoupled inversion pulses or composite inversion pulses. The dipolar decoupled inversion pulses are, in turn, constructed from standard solid echo pulse pairs. The six-pulse cycles are selected so that zero-order term of the average dipolar Hamiltonian is zero.
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