ArticleSolid state nuclear magnetic resonance2015
Frequency swept microwaves for hyperfine decoupling and time domain dynamic nuclear polarization.
Article in Solid state nuclear magnetic resonance, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 20 papers.
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Who cites it
20 citing papers in PubMed.
- High-field pulsed EPR spectroscopy under magic angle spinning.Science advances · 2024Article
- Characterization of dielectric properties and their impact on MAS-DNP NMR applications.Journal of magnetic resonance (San Diego, Calif. : 1997) · 2024Article
- Frequency-Chirped Magic Angle Spinning Dynamic Nuclear Polarization Combined with Electron Decoupling.The journal of physical chemistry letters · 2024Article
- Electron-decoupled MAS DNP with N@CPhysical chemistry chemical physics : PCCP · 2023Article
- Integrated, Stretched, and Adiabatic Solid Effects.The journal of physical chemistry letters · 2022Article
- The distance between g-tensors of nitroxide biradicals governs MAS-DNP performance: The case of the bTurea family.Journal of magnetic resonance (San Diego, Calif. : 1997) · 2021Article
- Characterization of photonic band resonators for DNP NMR of thin film samples at 7 T magnetic field.Journal of magnetic resonance (San Diego, Calif. : 1997) · 2021Article
- Optimizing nitroxide biradicals for cross-effect MAS-DNP: the role of g-tensors' distance.Physical chemistry chemical physics : PCCP · 2020Article
- Fast electron paramagnetic resonance magic angle spinning simulations using analytical powder averaging techniques.The Journal of chemical physics · 2019Article
- De novo prediction of cross-effect efficiency for magic angle spinning dynamic nuclear polarization.Physical chemistry chemical physics : PCCP · 2019Article
- Enhanced dynamic nuclear polarization via swept microwave frequency combs.Proceedings of the National Academy of Sciences of the United States of America · 2018Article
- Electron decoupling with cross polarization and dynamic nuclear polarization below 6 K.Journal of magnetic resonance (San Diego, Calif. : 1997) · 2018Article
- Pulsed Electron Decoupling and Strategies for Time Domain Dynamic Nuclear Polarization with Magic Angle Spinning.The journal of physical chemistry letters · 2018Article
- Magic angle spinning spheres.Science advances · 2018Article
- Off-resonance NOVEL.The Journal of chemical physics · 2017Article
- In Situ Characterization of Pharmaceutical Formulations by Dynamic Nuclear Polarization Enhanced MAS NMR.The journal of physical chemistry. B · 2017Article
- Frequency-Swept Integrated Solid Effect.Angewandte Chemie (International ed. in English) · 2017Article
- Ramped-amplitude NOVEL.The Journal of chemical physics · 2017Article
- A versatile and modular quasi optics-based 200GHz dual dynamic nuclear polarization and electron paramagnetic resonance instrument.Journal of magnetic resonance (San Diego, Calif. : 1997) · 2016Article
- Dynamic Nuclear Polarization as an Enabling Technology for Solid State Nuclear Magnetic Resonance Spectroscopy.Analytical chemistry · 2016Article
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Authors and funding
7 authors.
Funding
Abstract
Hyperfine decoupling and pulsed dynamic nuclear polarization (DNP) are promising techniques to improve high field DNP NMR. We explore experimental and theoretical considerations to implement them with magic angle spinning (MAS). Microwave field simulations using the high frequency structural simulator (HFSS) software suite are performed to characterize the inhomogeneous phase independent microwave field throughout a 198GHz MAS DNP probe. Our calculations show that a microwave power input of 17W is required to generate an average EPR nutation frequency of 0.84MHz. We also present a detailed calculation of microwave heating from the HFSS parameters and find that 7.1% of the incident microwave power contributes to dielectric sample heating. Voltage tunable gyrotron oscillators are proposed as a class of frequency agile microwave sources to generate microwave frequency sweeps required for the frequency modulated cross effect, electron spin inversions, and hyperfine decoupling. Electron spin inversions of stable organic radicals are simulated with SPINEVOLUTION using the inhomogeneous microwave fields calculated by HFSS. We calculate an electron spin inversion efficiency of 56% at a spinning frequency of 5kHz. Finally, we demonstrate gyrotron acceleration potentials required to generate swept microwave frequency profiles for the frequency modulated cross effect and electron spin inversions.
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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.