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Adiabatic TOCSY for C,C and H,H J-transfer
W Peti1, C Griesinger, W Bermel
1Universität Frankfurt, Institut für organische Chemie, Germany.
Journal of Biomolecular NMR
|January 6, 2001
Summary
New adiabatic pulses and supercycles enable broadband Total Correlation Spectroscopy (TOCSY) at high magnetic fields (800-900 MHz). These robust sequences offer superior or equal performance to existing methods, enhancing automated NMR spectroscopy.
Area of Science:
- Nuclear Magnetic Resonance (NMR) Spectroscopy
- Physical Chemistry
- Biophysical Chemistry
Background:
- Adiabatic pulses are crucial for broadband decoupling and spin inversion in high-field NMR.
- Existing methods like DIPSI-2,3 have limitations in bandwidth and robustness.
Purpose of the Study:
- To develop novel adiabatic pulse sequences and supercycles for broadband Total Correlation Spectroscopy (TOCSY) at high magnetic fields (800-900 MHz).
- To achieve efficient C,C or H,H J-transfer for enhanced NMR experiments.
Main Methods:
- Design and implementation of adiabatic pulse sequences and supercycles.
- Incorporation of these sequences into a z-filter HCCH-TOCSY experiment.
- Evaluation of sequence performance, bandwidth, and robustness against pulse miscalibration and B1 inhomogeneity.
Main Results:
- The proposed adiabatic mixing sequences provide broadband TOCSY with C,C or H,H J-transfer at high magnetic fields.
- Performance in terms of bandwidth is equal to or surpasses existing DIPSI-2,3 experiments.
- The sequences demonstrate robustness against pulse miscalibration and B1 inhomogeneity.
Conclusions:
- The developed adiabatic sequences are highly effective for broadband TOCSY at high magnetic fields.
- Their robustness makes them suitable for automated NMR spectrometer environments.
- Integration into a novel z-filter HCCH-TOCSY experiment expands their applicability.