Electron-Spin-Echo Envelope Modulation Arising from Hyperfine Coupling to a Nucleus of Arbitrary Spin

Ponti, Alessandro

doi:10.1006/jmre.1997.1179

Cited by 17 publications

(5 citation statements)

References 35 publications

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“…Generally, the larger the appropriate |Δ M I | values are, the lower the intensity of the correlation peaks in a HYSCORE spectrum is. Concordant for the 1D two-pulse and three-pulse ESEEM experiment, a strong decrease of the echo modulation amplitude with increasing |Δ M I | was found 2 Simulated powder HYSCORE spectra for an S = 1/2, I = 7/2 spin system showing the effect of the T ⊥ magnitude.…”

Section: Resultssupporting

confidence: 58%

¹³³Cesium HYSCORE Investigation of the Di-tert-butyl Nitroxide−Cs⁺ Adsorption Complex in CsNaY Zeolite

Gutjahr¹,

Böttcher²,

Pöppl³

2003

J. Phys. Chem. B

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133Cs hyperfine sublevel correlation (HYSCORE) spectroscopy has been employed to characterize the structure of adsorption complexes of di-tert-butyl nitroxide (DTBN) with cesium cations in zeolite CsNaY. The experimental 133Cs HYSCORE data proved the direct coordination of the adsorbed DTBN molecules to the Cs+ ions and revealed nonambiguously the existence of two different types of adsorption complexes. Evaluation of the orientation selective 133Cs HYSCORE spectra provided the 133Cs hyperfine coupling tensors and thus information about the geometrical structure of those complexes. For one type of adsorption complexes, a complex geometry was obtained where the Cs+ ion is located within the molecular mirror plane of the DTBN radical with an oxygen−cesium cation bond length of 0.25 nm. For this, the isotropic Cs hyperfine coupling was negative. The second Cs+−DTBN complex is characterized by a bent structure. With an isotropic 133Cs hyperfine coupling of 9 MHz, the unpaired electron spin density in this Cs+−DTBN complex localized at the Cs ion was 0.36%.

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Section: Resultssupporting

confidence: 58%

¹³³Cesium HYSCORE Investigation of the Di-tert-butyl Nitroxide−Cs⁺ Adsorption Complex in CsNaY Zeolite

Gutjahr¹,

Böttcher²,

Pöppl³

2003

J. Phys. Chem. B

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“…where U N 2 −1 (cos ϕ 2 ) are the Chebyshev polynomials of the second kind [26]. In the following we find analytical expressions for M 2 and cos ϕ 2 in order to give further insight into the occuring nuclear frequencies and their intensity enhancement.…”

Section: D Pulse Trainmentioning

confidence: 99%

“…Here we study the simplest case of I = 1/2. The method can be extended to nuclear spins with I ≥ 1 as described in [26], provided that the nuclear quadrupole interaction is negligible and can be ignored.…”

Section: D Pulse Trainmentioning

confidence: 99%

Modulation depth enhancement of ESEEM experiments using pulse trains

Mitrikas

Prokopiou

2015

Journal of Magnetic Resonance

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“…5, a-c. In most of our measurements, modulation depths >10% were observed, which makes the use of linearized analytical expressions for data analysis somewhat precarious (59). Therefore, our main data analysis method is based on modulation depth.…”

Section: Eseemmentioning

confidence: 99%

Pulsed EPR Determination of Water Accessibility to Spin-Labeled Amino Acid Residues in LHCIIb

Volkov

Dockter

Bund

et al. 2009

Biophysical Journal

113

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Membrane proteins reside in a structured environment in which some of their residues are accessible to water, some are in contact with alkyl chains of lipid molecules, and some are buried in the protein. Water accessibility of residues may change during folding or function-related structural dynamics. Several techniques based on the combination of pulsed electron paramagnetic resonance (EPR) with site-directed spin labeling can be used to quantify such water accessibility. Accessibility parameters for different residues in major plant light-harvesting complex IIb are determined by electron spin echo envelope modulation spectroscopy in the presence of deuterated water, deuterium contrast in transversal relaxation rates, analysis of longitudinal relaxation rates, and line shape analysis of electron-spin-echo-detected EPR spectra as well as by the conventional techniques of measuring the maximum hyperfine splitting and progressive saturation in continuous-wave EPR. Systematic comparison of these parameters allows for a more detailed characterization of the environment of the spin-labeled residues. These techniques are applicable independently of protein size and require approximately 10-20 nmol of singly spin-labeled protein per sample. For a residue close to the N-terminus, in a domain unresolved in the existing x-ray structures of light-harvesting complex IIb, all methods indicate high water accessibility.

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Electron-Spin-Echo Envelope Modulation Arising from Hyperfine Coupling to a Nucleus of Arbitrary Spin

Cited by 17 publications

References 35 publications

¹³³Cesium HYSCORE Investigation of the Di-tert-butyl Nitroxide−Cs⁺ Adsorption Complex in CsNaY Zeolite

¹³³Cesium HYSCORE Investigation of the Di-tert-butyl Nitroxide−Cs⁺ Adsorption Complex in CsNaY Zeolite

Modulation depth enhancement of ESEEM experiments using pulse trains

Pulsed EPR Determination of Water Accessibility to Spin-Labeled Amino Acid Residues in LHCIIb

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Electron-Spin-Echo Envelope Modulation Arising from Hyperfine Coupling to a Nucleus of Arbitrary Spin

Cited by 17 publications

References 35 publications

133Cesium HYSCORE Investigation of the Di-tert-butyl Nitroxide−Cs+ Adsorption Complex in CsNaY Zeolite

133Cesium HYSCORE Investigation of the Di-tert-butyl Nitroxide−Cs+ Adsorption Complex in CsNaY Zeolite

Modulation depth enhancement of ESEEM experiments using pulse trains

Pulsed EPR Determination of Water Accessibility to Spin-Labeled Amino Acid Residues in LHCIIb

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Product

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About

¹³³Cesium HYSCORE Investigation of the Di-tert-butyl Nitroxide−Cs⁺ Adsorption Complex in CsNaY Zeolite

¹³³Cesium HYSCORE Investigation of the Di-tert-butyl Nitroxide−Cs⁺ Adsorption Complex in CsNaY Zeolite