Bodycheck: Introduction

Dries, Luk Van den

doi:10.1163/9789004334274_001

Cited by 1 publication

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“…[43] In the motional region for τ R 10 À6 s, saturation transfer ESR spectroscopy technique can be used to determine the τ R values between 10 À6 and 10 À3 s. Saturation transfer ESR spectroscopy was used to determine the τ R values of spin probes in glassy sugarwater systems. [46] In this motional region (10 À12 to 10 À9 s), the ESR spectrum of nitroxyl radical consists of three lines, and τ R can be calculated according to the method of Knowles et al [47,48] :…”

Section: Rotational Correlation Timementioning

confidence: 99%

Electron spin resonance studies on deuterated nitroxyl spin probes used in Overhauser‐enhanced magnetic resonance imaging

Jebaraj

Utsumi

Benial³

2017

Magnetic Reson in Chemistry

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The electron spin resonance studies were carried out for 2 mm concentration of N-labeled and N-labeled 3-carbamoyl-2,2,5,5-tetramethyl-pyrrolidine-1-oxyl, 3-carboxy-2,2,5,5-tetramethyl-pyrrolidine-1-oxyl, 3-methoxycarbonyl-2,2,5,5-tetramethyl-pyrrolidine-1-oxyl and their deuterated nitroxyl radicals using X-band electron spin resonance spectrometer. The electron spin resonance line shape analysis was carried out. The electron spin resonance parameters such as linewidth, Lorentzian component, signal intensity ratio, rotational correlation time, hyperfine coupling constant and g-factor were estimated. The deuterated nitroxyl radicals have narrow linewidth and an increase in Lorentzian component, compared with undeuterated nitroxyl radicals. The dynamic nuclear polarization factor was observed for all nitroxyl radicals. Upon H labeling, about 70% and 40% increase in dynamic nuclear polarization factor were observed for N-labeled and N-labeled nitroxyl radicals, respectively. The signal intensity ratio and g-value indicate the isotropic nature of the nitroxyl radicals in pure water. Therefore, the deuterated nitroxyl radicals are suitable spin probes for in vivo/in vitro electron spin resonance and Overhauser-enhanced magnetic resonance imaging modalities. Copyright © 2017 John Wiley& Sons, Ltd.

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Section: Rotational Correlation Timementioning

confidence: 99%