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Electron spin echo modulation and nuclear relaxation studies.
Intramembrane Polarity by Electron Spin Echo Spectroscopy of.
Electron Spin Echo Spectroscopy and Photosynthesis.
Electron Spin Echo Methods in Photosynthesis Research.
Twenty-three–millisecond electron spin coherence of erbium.
Spin Echo of a Single Electron Spin in a Quantum Dot.
Electron spin echo modulation of the photoexcited triplets of.
Electron Spin Echo Envelope Modulation Studies of the Cu(II.
Electron spin echo envelope modulation studies of water bound to.
Electron spin echo decay as a probe of aminoxyl environment.
Electron-Spin-Echo Envelope Modulation - NASA/ADS.
The return of the spin echo - P.
Electron paramagnetic resonance - Wikipedia.
Double electron–electron resonance spin–echo modulation.

Electron spin echo modulation and nuclear relaxation studies.

The theory of the effect is developed for purely magnetically coupled nuclei and is confirmed by electron-spin-echo measurements of paramagnetic Ce 3 + in CaW O 4, where the 14%-abundant W 183 nuclear isotope is coupled to Ce 3 +. The electron-nuclear ligand tensor dipole-dipole interaction is estimated from experiment to be as much as four times greater than that.

Intramembrane Polarity by Electron Spin Echo Spectroscopy of.

This results in one of the lowest nuclear magnetic moment densities among natural-abundance crystals, leading to recent predictions that a Hahn echo electron spin coherence time of 20 ms should be achievable in this matrix. To characterize spin coherence, we rely throughout this article on the Hahn echo pulse sequence, because its widespread.

Electron Spin Echo Spectroscopy and Photosynthesis.

Genetically-engineered human carbonic anhydrase II mutants have been prepared with cysteine introduced at selected locations and spin-labeled with an aminoxyl (formerly known as nitroxide) radical. Two-pulse electron spin echo data have been obtained for samples in 1∶1 water–glycerol employing a Bruker ESP380E spec. A Hahn spin echo measurement of the five-electron state, plotting the measured spin-up fraction Δp ↑ as a function of total free precession time 2τ. b Spin echo envelope measurement with a.

Electron Spin Echo Methods in Photosynthesis Research.

In the 46 years since its discovery in Ce(III)-doped CaWO 4 single crystals, electron spin echo envelope modulation (ESEEM) spectroscopy has developed into an important method for the characterization of paramagnetic centers. The capability of ESEEM to resolve ligand hyperfine couplings to paramagnetic transition metal ions in powder or frozen solution samples, and its sensitivity to the. An electron spin–echo modulation study of partially cupric ion exchanged A-type zeolites in the hydrated state shows that the cupric ions are preferentially adsorbed in site S2 where they are solvated by two water molecules with a Cu—O distance of 0.20 nm. S2 is a hexagonal interior face between the α- and β-cages.

Twenty-three–millisecond electron spin coherence of erbium.

Electron spin echo (ESE) spectroscopy of spin-labeled molecules allows detecting their restricted stochastic rotations (stochastic molecular librations). As in molecular disordered media motions may be highly cooperative, it would be desirable to investigate their spectroscopic manifestation also in the systems where cooperative effects would be certainly ruled out.

Spin Echo of a Single Electron Spin in a Quantum Dot.

Electron spin echo envelope modulation (ESEEM) spectroscopy as a tool to investigate the coordination environment of metal centers. Coordination Chemistry Reviews 2000, 204 (1) , 1-112. (99)00218-0 Zbigniew Sojka, Michel Che. Catalytic chemistry of transition metal ions on oxide surfaces.

Electron spin echo modulation of the photoexcited triplets of.

1. Electron spin echo experiments are commonly performed at low temperatures on magnetically dilute materials characterized by inhomogeneous line broadening. Google Scholar 2. L. G. Rowan, E. L. Hahn, and W. B. Mims, Phys. Rev. A 137, 61 (1965). Google Scholar Crossref 3. G. M. Zhidomirov and K. M. Salikov, Teor. Eksp. Khim. 4, 514 (1968).

Electron Spin Echo Envelope Modulation Studies of the Cu(II.

Electron spin echo (ESE) EPR spectra were recorded by means of field-swept two-pulse echo sequence [pi]/2- [tau]- [pi] with the pulse length of [pi] pulse of 12 ns and time delay r = 240 ns. The dependence of the kinetics of electron spin echo amplitude decay on increase of delay time between the microwave pulses is presented in Figure 3. Electron Spin Echo Spectroscopy and Photosynthesis You are accessing a document from the Department of Energy's (DOE) OSTI.GOV. This site is a product of DOE's Office of Scientific and Technical Information (OSTI) and is provided as a public service. Visit OSTI to utilize additional information resources in energy science and technology. Authors. Fourier transform of the stimulated electron spin-echo envelope for the Cu(II)-substituted enzyme, Cu(II)IPNS, revealed two nearly magnetically equivalent, equatorially coordinated His imidazoles. The superhyperfine coupling constant, A iso, for the remote 14 N of each imidazole was 1.65 MHz.

Electron spin echo envelope modulation studies of water bound to.

Electron Spin Echo Envelope Modulation Spectroscopy EPR, Methods. Electron-spin echo envelope modulation (ESEEM) spectroscopy is a pulsed technique that detects weak... Transition Metal Groups 7 and 8. D.C. Weatherburn,...... Catalases catalyze the conversion of hydrogen peroxide to... EPR on. ESEEM. A number of microwave pulse sequences (e.g. two- pulse, three- pulse,...) are able to create an electron spin echo. When the time between two of these pulses is increased, the echo is usually found to decay exponentially. This decay is determined by spin- lattice and/or spin- spin relaxation (depend.

Electron spin echo decay as a probe of aminoxyl environment.

Spin echo is widely used in bulk electron spin resonance (ESR) experiments to study interactions and to determine the structure of complex molecules ().Recently, local contact interactions were observed between single-NV electronic spins and the nuclear spins associated with the host nitrogen and the nearest-neighbor carbon atoms (3, 24).

Electron-Spin-Echo Envelope Modulation - NASA/ADS.

Electron Spin Echo Envelope Modulation (ESEEM) spectroscopy is a powerful technique for the study of hyperfine interactions between an unpaired electron and nearby nuclei in solids, and is employed in quantitative structural studies. Here, we describe the use of ESEEM to study the slow motion of deu.

The return of the spin echo - P.

The electron free-precession beats are measured conveniently in terms of the electron-spin-echo envelope modulation pattern obtained from the two-pulse echo experiment. The theory of the effect is developed for purely magnetically coupled nuclei and is confirmed by electron-spin-echo measurements of paramagnetic Ce 3+ in CaWO 4 , where the 14%.

Electron paramagnetic resonance - Wikipedia.

Electron Spin Echo Methods in Photosynthesis Research R. David Britt Chapter 540 Accesses 3 Citations Part of the Advances in Photosynthesis and Respiration book series (AIPH,volume 3) Summary Electron spin echo methods allow photosynthesis researchers to probe the local structure of paramagnetic transition metal and organic radical centers. Methods of envelope modulation function calculations in the case of paramagnetic centers having an axially symmetric g factor are described. Parameters of the hyperfine interactions between unpaired electrons of VO 2+ ions and molecular deuterons have been obtained from the analysis of envelope modulation patterns for the two- and three-pulse electron spin echo of VO 2+ complexes with D 2 O.

Double electron–electron resonance spin–echo modulation.

Electron spin echo modulation analysis of photoproduced radical cation locations in micelles and vesicles. International Journal of Radiation Applications and Instrumentation. Part C. Radiation Physics and Chemistry 1991, 37 (5-6) , 629-633. (91)90160-4 M. Mostafavi, J.L. Marignier, J. Amblard, J. Belloni.. Two-pulse echo. In 1950, Erwin Hahn [1] astonished the scientific community with his discovery of nuclear spin echoes (Figure 1). Eight years later, Richard Blume [2] reported the first observation of an electron spin echo. In magnetic resonance, different types of spin echoes can be distinguished.