The measurement of inhomogeneous distributions of paramagnetic centers by means of EPR

Karthe, W.; Wehrsdorfer, E.

doi:10.1016/0022-2364(79)90193-8

Cited by 30 publications

(11 citation statements)

References 6 publications

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“…8,11 ESRI is based on recording a set of ESR spectra under the influence of well-defined field gradients. 12,13 After image reconstruction, statements about the spatial distribution of paramagnetic centres can be made. The extraction of spectral and spatial information on paramagnetic centres by means of spectral-spatial imaging was described by Maltempo, 11 thus allowing the non-destructive detection of property changes in different parts of an object.…”

Section: -13mentioning

confidence: 99%

ESR imaging investigations of two‐phase systems

Herrmann

Stößer

Borchert

2007

Magnetic Reson in Chemistry

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The possibilities of electron spin resonance (ESR) and electron spin resonance imaging (ESRI) for investigating the properties of the spin probes TEMPO and TEMPOL in two-phase systems have been examined in the systems water/n-octanol, Miglyol/Miglyol, and Precirol/Miglyol. Phases and regions of the phase boundary could be mapped successfully by means of the isotropic hyperfine coupling constants, and, moreover, the quantification of rotational and lateral diffusion of the spin probes was possible. For the quantitative treatment of the micropolarity, a simplified empirical model was established on the basis of the Nernst distribution and the experimentally determined isotropic hyperfine coupling constants. The model does not only describe the summarized micropolarities of coexisting phases, but also the region of the phase boundary, where solvent molecules of different polarities and tendencies to form hydrogen bonds compete to interact with the NO group of the spin probe.

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Section: -13mentioning

confidence: 99%

ESR imaging investigations of two‐phase systems

Herrmann

Stößer

Borchert

2007

Magnetic Reson in Chemistry

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“…Although EPR Imaging (EPRI) has been used for several decades now [5], commercially available equipments are relatively recent and the technique is still in the beginning of a growing use. After its initial use in the field of material sciences studying paramagnetic centers in materials such as diamonds [6,7], EPRI was extended to in vivo applications in the early 1980s [8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Spectral spatial electron paramagnetic resonance imaging as a tool to study photoactive dimethacrylate-based dental resins

Lévêque

Leprince

Bebelman

et al. 2012

Journal of Magnetic Resonance

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“…Finally caused by the specifics of electron spin resonance (ESR), the field of ESR tomography is not so well developed as the corresponding nuclear magnetic method. Some questions of ESR tomography are open and one should be answered in this paper [3].…”

Section: Introductionmentioning

confidence: 99%

Rates of rotational diffusion and Heisenberg spin exchange as obtained from CW ESR and ESR tomographic experiments on model systems and human skin

et al. 2005

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The purpose of the present paper is to describe p ossibilities and limitations for the determination of the rates of rotational diffusion and Heisenberg spin exchange, obtained from eontinuous-wave electron spin resonance (cw ESR) and ESR tomographic experiments. Model systems including nitroxides as paramagnetic reporter molecules have been examined in order to verify data, which have been obtained from cw ESR and ESR tomography. This has been done with particular emphasis on checking the influence of concentration, temperature, and viscosity on the spectral-spatial properties. These findings have been applied to the evaluation of penetration and permeation studies on human skin, The extracted full spectral information from ESR tomography allows the determination of the above mentioned dynamic parameters for model systems of definite geometry and for samples of human skin. It has been found that the signal-to-noise ratio is critical for all discussed applications.

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The measurement of inhomogeneous distributions of paramagnetic centers by means of EPR

Cited by 30 publications

References 6 publications

ESR imaging investigations of two‐phase systems

ESR imaging investigations of two‐phase systems

Spectral spatial electron paramagnetic resonance imaging as a tool to study photoactive dimethacrylate-based dental resins

Rates of rotational diffusion and Heisenberg spin exchange as obtained from CW ESR and ESR tomographic experiments on model systems and human skin

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