ArticleThe journal of physical chemistry. B2015
Room-Temperature Electron Spin Relaxation of Triarylmethyl Radicals at the X- and Q-Bands.
Article in The journal of physical chemistry. B, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 27 papers.
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Who cites it
27 citing papers in PubMed, 82 citations in OpenAlex.
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- How Spin Conductive are Oligo(p-phenylenes) in Trityl-Based Biradicals.Journal of the American Chemical Society · 2026Article
- Paramagnetic Agents for SE DNP: Synthesis and ESR Characterization of New Lipophilic Derivatives of Finland Trityl.Molecules (Basel, Switzerland) · 2025Article
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- A bioinspired scaffold for rapid oxygenation of cell encapsulation systems.Nature communications · 2021Article
- Cleavage-Resistant Protein Labeling With Hydrophilic Trityl Enables Distance MeasurementsThe journal of physical chemistry. B · 2021Article
- An inverse-breathing encapsulation system for cell delivery.Science advances · 2021Article
- Ox-SLIM: Synthesis of and Site-Specific Labelling with a Highly Hydrophilic Trityl Spin Label.Chemistry (Weinheim an der Bergstrasse, Germany) · 2021Article
- Development of a PET/EPRI combined imaging system for assessing tumor hypoxia.Journal of instrumentation : an IOP and SISSA journal · 2021Article
- Biological validation of electron paramagnetic resonance (EPR) image oxygen thresholds in tissue.The Journal of physiology · 2021Review
- In Situ Labeling and Distance Measurements of Membrane Proteins in E. coli Using Finland and OX063 Trityl Labels.Chemistry (Weinheim an der Bergstrasse, Germany) · 2021Article
- SLIM: A Short-Linked, Highly Redox-Stable Trityl Label for High-Sensitivity In-Cell EPR Distance Measurements.Angewandte Chemie (International ed. in English) · 2020Article
- Trajectory-Based Simulation of EPR Spectra: Models of Rotational Motion for Spin Labels on Proteins.The journal of physical chemistry. B · 2019Article
- Site Selective and Efficient Spin Labeling of Proteins with a Maleimide-Functionalized Trityl Radical for Pulsed Dipolar EPR Spectroscopy.Molecules (Basel, Switzerland) · 2019Article
- Oxygen-Guided Radiation Therapy.International journal of radiation oncology, biology, physics · 2019Article
- Highly sensitive electron paramagnetic resonance nanoradicals for quantitative intracellular tumor oxymetric images.International journal of nanomedicine · 2019Article
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Authors and funding
9 authors at 2 institutions in 1 country.
Funding
Abstract
Triarylmethyl radicals (trityls, TAMs) represent a relatively new class of spin labels. The long relaxation of trityls at room temperature in liquid solutions makes them a promising alternative for traditional nitroxides. In this work we have synthesized a series of TAMs including perdeuterated Finland trityl (D36 form), mono-, di-, and triester derivatives of Finland-D36 trityl, the deuterated form of OX63, the dodeca-n-butyl homologue of Finland trityl, and triamide derivatives of Finland trityl with primary and secondary amines attached. We have studied room-temperature relaxation properties of these TAMs in liquids using pulsed electron paramagnetic resonance (EPR) at two microwave frequency bands. We have found the clear dependence of phase memory time (Tm ∼ T2) on the magnetic field: room-temperature Tm values are ∼1.5-2.5 times smaller at the Q-band (34 GHz, 1.2 T) than at the X-band (9 GHz, 0.3 T). This trend is ascribed to the contribution from g-anisotropy that is negligible at lower magnetic fields but comes into play at the Q-band. In agreement with this, the difference between T1 and Tm becomes more pronounced at the Q-band than at the X-band due to increased contributions from incomplete motional averaging of g-anisotropy. Linear dependence of (1/Tm - 1/T1) on viscosity implies that g-anisotropy is modulated by rotational motion of the trityl radical. On the basis of the analysis of previous data and results of the present work, we conclude that, in the general situation where the spin label is at least partly mobile, the X-band is most suitable for application of trityls for room-temperature pulsed EPR distance measurements.
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