ArticleJournal of magnetic resonance (San Diego, Calif. : 1997)2021
The distance between g-tensors of nitroxide biradicals governs MAS-DNP performance: The case of the bTurea family.
Article in Journal of magnetic resonance (San Diego, Calif. : 1997), 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers.
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Who cites it
13 citing papers in PubMed, 30 citations in OpenAlex.
- High-frequency dynamic nuclear polarization in rotating solids.Science advances · 2026Review
- EPR spectroscopy 80 years after its discovery.Science advances · 2026Review
- Systematic Evaluation of Polarizing Agents for Dynamic Nuclear Polarization Enhanced NMR.Angewandte Chemie (International ed. in English) · 2025Article
- Indirect Detection of the Protons in and around Biradicals and their Mechanistic Role in MAS-DNP.The journal of physical chemistry letters · 2025Article
- Characterization of dielectric properties and their impact on MAS-DNP NMR applications.Journal of magnetic resonance (San Diego, Calif. : 1997) · 2024Article
- Role of Protons in and around Strongly Coupled Nitroxide Biradicals for Cross-Effect Dynamic Nuclear Polarization.The journal of physical chemistry letters · 2024Article
- AsymPol-TEKs as efficient polarizing agents for MAS-DNP in glass matrices of non-aqueous solvents.Physical chemistry chemical physics : PCCP · 2024Article
- Polarizing agents for efficient high field DNP solid-state NMR spectroscopy under magic-angle spinning: from design principles to formulation strategies.Chemical science · 2023Review
- PyrroTriPol: a semi-rigid trityl-nitroxide for high field dynamic nuclear polarization.Chemical science · 2023Article
- Solid-State NMR Investigations of Extracellular Matrixes and Cell Walls of Algae, Bacteria, Fungi, and Plants.Chemical reviews · 2022Review
- Spinning-Driven Dynamic Nuclear Polarization with Optical Pumping.The journal of physical chemistry. A · 2022Article
- Dynamic nuclear polarization-enhanced, double-quantum filteredJournal of magnetic resonance (San Diego, Calif. : 1997) · 2022Article
- Numerical recipes for faster MAS-DNP simulations.Journal of magnetic resonance (San Diego, Calif. : 1997) · 2021Article
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Authors and funding
4 authors at 2 institutions in 2 countries.
Funding
Abstract
Bis-nitroxide radicals are common polarizing agents (PA), used to enhance the sensitivity of solid-state NMR experiments via Magic Angle Spinning Dynamic Nuclear Polarization (MAS-DNP). These biradicals can increase the proton spin polarization through the Cross-Effect (CE) mechanism, which requires PAs with at least two unpaired electrons. The relative orientation of the bis-nitroxide moieties is critical to ensure efficient polarization transfer. Recently, we have defined a new quantity, the distance between g-tensors, that correlates the relative orientation of the nitroxides with the ability to polarize the surrounding nuclei. Here we analyse experimentally and theoretically a series of biradicals belonging to the bTurea family, namely bcTol, AMUPol and bcTol-M. They differ by the degree of substitution on the urea bridge that connects the two nitroxides. Using quantitative simulations developed for moderate MAS frequencies, we show that these modifications mostly affect the relative orientations of the nitroxide, i.e. the length and distribution of the distance between the g-tensors, that in turn impacts both the steady state nuclear polarization/depolarization as well as the build-up times. The doubly substituted urea bridge favours a large distance between the g-tensors, which enables bcTol-M to provide ∊
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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.