Adiabatic TOCSY for C,C and H,H J-transfer.
Adiabatic pulses have been widely used for broadband decoupling and spin inversion at high magnetic fields. In this paper we propose adiabatic pulses and supercycles that can be used at high magnetic fields like 800 or 900 MHz to obtain broadband TOCSY sequences with C,C or H,H J-transfer. The new mixing sequences are equal or even superior to the well known DIPSI-2,3 experiments with respect to bandwidth. They prove robust against pulse miscalibration and B1 inhomogeneity and are therefore attractive for fully automated spectrometer environments. These adiabatic mixing sequences have been incorporated in a novel z-filter HCCH-TOCSY experiment.
Peti
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W
Universität Frankfurt, Institut für organische Chemie, Germany.
Griesinger
C
C
Bermel
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W
D002138:Calibration; D001330:Electronic Data Processing; D008280:Magnetics / Q000295:instrumentation; D019906:Nuclear Magnetic Resonance, Biomolecular / Q000295:instrumentation / Q000379:methods*; D012680:Sensitivity and Specificity