ArticleJournal of magnetic resonance (San Diego, Calif. : 1997)2008
Electron spin-lattice relaxation of nitroxyl radicals in temperature ranges that span glassy solutions to low-viscosity liquids.
Article in Journal of magnetic resonance (San Diego, Calif. : 1997), 2008. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 31 papers.
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Who cites it
31 citing papers in PubMed.
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- Sorbitol-Based Glass Matrices Enable Dynamic Nuclear Polarization beyond 200 K.The journal of physical chemistry letters · 2024Article
- A Highly Ordered Nitroxide Side Chain for Distance Mapping and Monitoring Slow Structural Fluctuations in Proteins.Applied magnetic resonance · 2024Article
- Oligomeric and Fibrillar α-Synuclein Display Persistent Dynamics and Compressibility under Controlled Confinement.ACS chemical neuroscience · 2023Article
- Native and nonnative reactions in ethanolamine ammonia-lyase are actuated by different dynamics.Biophysical journal · 2023Article
- Confinement dependence of protein-associated solvent dynamics around different classes of proteins, from the EPR spin probe perspective.Physical chemistry chemical physics : PCCP · 2022Article
- Spin-Lattice Relaxation Rates of Lipid Spin Labels as a Measure of Their Rotational Diffusion Rates in Lipid Bilayer Membranes.Membranes · 2022Article
- Resolution and characterization of confinement- and temperature-dependent dynamics in solvent phases that surround proteins in frozen aqueous solution by using spin-probe EPR spectroscopy.Methods in enzymology · 2022Article
- Evidence for an Ordering Transition near 120 K in an Intrinsically Disordered Protein, Casein.Molecules (Basel, Switzerland) · 2021Article
- Solute Diffusion into Polymer Swollen by Supercritical COPolymers · 2021Article
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- Control of Solvent Dynamics around the BThe journal of physical chemistry. B · 2019Article
- NMR Signal Quenching from Bound Biradical Affinity Reagents in DNP Samples.The journal of physical chemistry. B · 2017Article
- Long Distance Measurements up to 160 Å in the GroEL Tetradecamer Using Q-Band DEER EPR Spectroscopy.Angewandte Chemie (International ed. in English) · 2016Article
- Pushing NMR sensitivity limits using dynamic nuclear polarization with closed-loop cryogenic helium sample spinning.Chemical science · 2015Article
- Multifrequency Pulsed EPR and the Characterization of Molecular Dynamics.Methods in enzymology · 2015Article
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6 authors.
Funding
Abstract
Electron spin-lattice relaxation rates, 1/T1, at X-band of nitroxyl radicals (4-hydroxy-2,2,6,6-tetramethylpiperidin-1-oxyl, 4-oxo-2,2,6,6-tetramethylpiperidin-1-oxyl, 3-carbamoyl-2,2,5,5-tetramethylpyrrolidin-1-oxyl and 3-carbamoyl-2,2,5,5-tetramethylpyrrolin-1-oxyl) in glass-forming solvents (decalin, glycerol, 3-methylpentane, o-terphenyl, 1-propanol, sorbitol, sucrose octaacetate, and 1:1 water:glycerol) at temperatures between 100 and 300K were measured by long-pulse saturation recovery to investigate the relaxation processes in slow-to-fast tumbling regimes. A subset of samples was also studied at lower temperatures or at Q-band. Tumbling correlation times were calculated from continuous wave lineshapes. Temperature dependence and isotope substitution (2H and 15N) were used to distinguish the contributions of various processes. Below about 100K relaxation is dominated by the Raman process. At higher temperatures, but below the glass transition temperature, a local mode process makes significant contributions. Above the glass transition temperature, increased rates of molecular tumbling modulate nuclear hyperfine and g anisotropy. The contribution from spin rotation is very small. Relaxation rates at X-band and Q-band are similar. The dependence of 1/T1 on tumbling correlation times fits better with the Cole-Davidson spectral density function than with the Bloembergen-Purcell-Pound model.
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