Electricity: measuring and testing – Particle precession resonance – Using a nuclear resonance spectrometer system
Reexamination Certificate
2007-06-14
2009-12-01
Arana, Louis M (Department: 2831)
Electricity: measuring and testing
Particle precession resonance
Using a nuclear resonance spectrometer system
C324S311000
Reexamination Certificate
active
07626386
ABSTRACT:
A nuclear magnetic resonance (NMR) method for singlet-state exchange NMR-spectroscopy comprises steps of excitation of single-quantum in-phase coherences, generation of single-quantum anti-phase coherences, excitation of zero-quantum coherences ZQxand/or longitudinal two-spin order 2IzSz(=“ZZ order”) using a π/4 pulse, reversal of the sign of the zero-quantum coherences ZQxunder the effect of the difference of the chemical shifts of the examined spins, transformation of the zero-quantum coherences ZQxand/or longitudinal two-spin ZZ order into singlet-state populations by means of RF irradiation during a mixing period τm, reconversion of the singlet-state populations remaining at the end of the mixing period τminto zero-quantum coherences ZQxand/or ZZ order, reversal of the sign of the zero-quantum coherences ZQxunder the effect of the difference of the chemical shifts of the examined spins, and reconversion of zero-quantum coherences ZQxand/or ZZ order into single-quantum anti-phase coherences. With the broadband method for the excitation of single state population, NMR can monitor correlations between states that are connected through very slow processes.
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Bodenhausen Geoffrey
Sarkar Riddhiman
Vasos Paul
Arana Louis M
Bruker BioSpin AG
Ecole Polytechnique Federale de Lausanne (EPFL)
Vincent Paul
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