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How to Tickle Spins with a Fourier Transform NMR Spectrometer
Author(s) -
Segawa Takuya F.,
Carnevale Diego,
Bodenhausen Geoffrey
Publication year - 2013
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.201200858
Subject(s) - homonuclear molecule , spectrometer , spins , fourier transform , heteronuclear molecule , continuous wave , chemistry , pulse sequence , spectroscopy , fourier transform spectroscopy , nuclear magnetic resonance spectroscopy , nuclear magnetic resonance , resolution (logic) , fourier analysis , computational physics , atomic physics , physics , analytical chemistry (journal) , optics , condensed matter physics , laser , quantum mechanics , molecule , organic chemistry , artificial intelligence , chromatography , computer science
In the long bygone days of continuous‐wave nuclear magnetic resonance (NMR) spectroscopy, a selected transition within a multiplet of a high‐resolution spectrum could be irradiated by a highly selective continuous‐wave (CW) radio‐frequency (rf) field with a very weak amplitude ${\omega _2 }$ /(2π)≤ J . This causes splittings of connected transitions, allowing one to map the connectivities of all transitions within the energy‐level diagram of the spin system. Such “tickling” experiments stimulated the invention of two‐dimensional spectroscopy, but seem to have been forgotten for nearly 50 years. We show that tickling can readily be achieved in homonuclear systems with Fourier transform spectrometers by applying short pulses in the intervals between the sampling points. Extensions to heteronuclear systems are even more straightforward since they can be carried out using very weak CW rf fields.