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Published on: August 15, 2014
Low-power decoupling at high spinning frequencies in high static fields
Markus Weingarth1, Geoffrey Bodenhausen, Piotr Tekely
1Département de Chimie, associé au CNRS, Ecole Normale Supérieure, Paris, France.
Summary
We show that the Phase-Inverted Supercycled Sequence for Attenuation of Rotary ResOnance (PISSARRO) effectively suppresses unwanted signals in solid-state NMR. This technique works efficiently even under demanding conditions of high spinning frequencies and magnetic fields.
Area of Science:
- Solid-state Nuclear Magnetic Resonance (NMR) spectroscopy.
- Advanced pulse sequence development for NMR.
Background:
- Heteronuclear decoupling is crucial for simplifying complex NMR spectra in solid materials.
- Rotary resonance effects can complicate high-speed magic angle spinning NMR experiments.
- Existing decoupling methods may struggle under high magnetic fields and spinning frequencies.
Purpose of the Study:
- To evaluate the efficacy of the PISSARRO pulse sequence for heteronuclear decoupling.
- To assess PISSARRO performance at high spinning frequencies (60 kHz) and high magnetic fields (21 T).
- To demonstrate PISSARRO's robustness against wide proton chemical shift distributions and chemical shift anisotropy.
Main Methods:
- Implementation and application of the PISSARRO pulse sequence in solid-state NMR.
- Experiments conducted at a proton frequency of 900 MHz (21 T).
- Utilized moderate radio-frequency decoupling field strengths (15 kHz).
Main Results:
- PISSARRO demonstrated high efficiency in heteronuclear decoupling under the tested conditions.
- Effective signal suppression was achieved despite a wide range of proton chemical shifts.
- The sequence performed well even with significant chemical shift anisotropy effects.
Conclusions:
- PISSARRO is a highly efficient technique for heteronuclear decoupling in solid-state NMR.
- The sequence is suitable for challenging experimental setups involving high spinning speeds and magnetic fields.
- PISSARRO offers a robust solution for obtaining cleaner spectra in complex solid samples.
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