ArticlePhysical chemistry chemical physics : PCCP2013
Electron spin resonance studies of trityl OX063 at a concentration optimal for DNP.
Article in Physical chemistry chemical physics : PCCP, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 40 papers.
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40 citing papers in PubMed, 91 citations in OpenAlex.
- Comparing low-field cryogenic nuclear relaxation of hyperpolarized diamond and silicon particles.Scientific reports · 2025Article
- Reaction of polarizing agent Ox063 with pyruvic acid under standard sample preparation protocol for dissolution dynamic nuclear polarization.RSC advances · 2025Article
- Large-enhancement nanoscale dynamic nuclear polarization near a silicon nanowire surface.Science advances · 2024Article
- Pulsed dynamic nuclear polarization: a comprehensive Floquet description.Physical chemistry chemical physics : PCCP · 2024Article
- An analysis of double-quantum coherence ESR in an N-spin system: Analytical expressions and predictions.The Journal of chemical physics · 2024Article
- Relaxation enhancement by microwave irradiation may limit dynamic nuclear polarization.Physical chemistry chemical physics : PCCP · 2024Article
- Resonant Mixing Dynamic Nuclear Polarization.The journal of physical chemistry letters · 2023Article
- Dynamic nuclear polarization with trityl radicals.Journal of magnetic resonance (San Diego, Calif. : 1997) · 2023Article
- Radical-Induced Low-FieldThe journal of physical chemistry letters · 2022Article
- Integrated, Stretched, and Adiabatic Solid Effects.The journal of physical chemistry letters · 2022Article
- DNPSOUP: A simulation software package for dynamic nuclear polarization.Journal of magnetic resonance (San Diego, Calif. : 1997) · 2022Review
- Spin-spin interaction and relaxation in two trityl-nitroxide diradicals.Journal of magnetic resonance (San Diego, Calif. : 1997) · 2021Article
- Hyperpolarization via dissolution dynamic nuclear polarization: new technological and methodological advances.Magma (New York, N.Y.) · 2021Review
- Article
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- Application and methodology of dissolution dynamic nuclear polarization in physical, chemical and biological contexts.Journal of magnetic resonance (San Diego, Calif. : 1997) · 2019Review
- Direct dynamic nuclear polarization ofSolid state nuclear magnetic resonance · 2019Article
- Effects of glassing matrix deuteration on the relaxation properties of hyperpolarizedThe Journal of chemical physics · 2019Article
- Detection of the Surface of Crystalline YThe journal of physical chemistry letters · 2019Article
- The effect of HoPhysical chemistry chemical physics : PCCP · 2018Article
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9 authors at 5 institutions in 1 country.
Funding
Abstract
We have performed temperature-dependent electron spin resonance (ESR) measurements of the stable free radical trityl OX063, an efficient polarizing agent for dissolution dynamic nuclear polarization (DNP), at the optimum DNP concentration (15 mM). We have found that (i) when compared to the W-band electron spin-lattice relaxation rate T1e(-1) of other free radicals used in DNP at the same concentration, trityl OX063 has slower T1e(-1) than BDPA and 4-oxo-TEMPO. At T > 20 K, the T1e(-1)vs. T data of trityl OX063 appears to follow a power law dependence close to the Raman process prediction whereas at T < 10 K, electronic relaxation slows and approaches the direct process behaviour. (ii) Gd(3+) doping, a factor known to enhance DNP, of trityl OX063 samples measured at W-band resulted in monotonic increases of T1e(-1) especially at temperatures below 20-40 K while the ESR lineshapes remained essentially unchanged. (iii) The high frequency ESR spectrum can be fitted with an axial g-tensor with a slight g-anisotropy: g(x) = g(y) = 2.00319(3) and g(z) = 2.00258(3). Although the ESR linewidth D monotonically increases with field, the temperature-dependent T1e(-1) is almost unchanged as the ESR frequency is increased from 9.5 GHz to 95 GHz, but becomes faster at 240 GHz and 336 GHz. The ESR properties of trityl OX063 reported here may provide insights into the efficiency of DNP of low-γ nuclei performed at various magnetic fields, from 0.35 T to 12 T.
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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.