Electron Spin−Echo Envelope Modulation and Pulse Electron Nuclear Double Resonance Studies of Cu2+···β-Carotene Interactions in Cu-MCM-41 Molecular Sieves

2005 ◽  
Vol 109 (39) ◽  
pp. 18289-18292 ◽  
Author(s):  
Yunlong Gao ◽  
Lowell D. Kispert ◽  
Johan van Tol ◽  
Louis-Claude Brunel
Keyword(s):  
Electron Spin ◽  
Molecular Sieves ◽  
Spin Echo ◽  
Double Resonance ◽  
Electron Spin Echo ◽  
Pulse Electron ◽  
Electron Nuclear Double Resonance ◽  
Β Carotene ◽  
Mcm 41 ◽  
Envelope Modulation

scholarly journals EPR, Electron Spin Echo Envelope Modulation, and Electron Nuclear Double Resonance Studies of the 2Fe2S Centers of the 2-Halobenzoate 1,2-Dioxygenase fromBurkholderia(Pseudomonas)cepacia2CBS

1995 ◽  
Vol 270 (52) ◽  
pp. 30869-30873 ◽  
Author(s):  
Astrid Riedel ◽  
Susanne Fetzner ◽  
Martin Rampp ◽  
Franz Lingens ◽  
Ursula Liebl ◽  
...  
Keyword(s):  
Electron Spin ◽  
Spin Echo ◽  
Double Resonance ◽  
Electron Spin Echo ◽  
Electron Nuclear Double Resonance ◽  
Envelope Modulation

scholarly journals Simulations of the 1 H electron spin echo–electron nuclear double resonance and 2 H electron spin echo envelope modulation spectra of exchangeable hydrogen nuclei coupled to the S 2 –state photosystem II manganese cluster

2002 ◽  
Vol 357 (1426) ◽  
pp. 1359-1366 ◽  
Author(s):  
Constantino P. Aznar ◽  
R. David Britt
Keyword(s):  
Photosystem Ii ◽  
Electron Spin ◽  
Spin Echo ◽  
Double Resonance ◽  
Electron Spin Echo ◽  
Oxygen Evolving Complex ◽  
Electron Nuclear Double Resonance ◽  
Paramagnetic Resonance ◽  
Pulsed Epr ◽  
Envelope Modulation

The pulsed EPR methods of electron spin echo envelope modulation (ESEEM) and electron spin echo–electron nuclear double resonance (ESE–ENDOR) are used to investigate the proximity of exchangeable hydrogens around the paramagnetic S 2 –state Mn cluster of the photosystem II oxygen–evolving complex. Although ESEEM and ESE–ENDOR are both pulsed electron paramagnetic resonance techniques, the specific mechanisms by which nuclear spin transitions are observed are quite different. We are able to generate good simulations of both 1 H ESE–ENDOR and 2 H ESEEM signatures of exchangeable hydrogens at the S 2 –state cluster. The convergence of simulation parameters for both methods provides a high degree of confidence in the simulations. Several exchangeable protons–deuterons with strong dipolar couplings are observed. In the simulations, two of the close (≈2.5 Å) hydrogen nuclei exhibit strong isotropic couplings and are therefore most probably associated with direct substrate ligation to paramagnetic Mn. Another two of the close (≈2.7 Å) hydrogen nuclei show no isotropic couplings and are therefore most probably not contained in Mn ligands. We suggest that these proximal hydrogens may be associated with a Ca 2+ –bound substrate, as indicated in recent mechanistic proposals for O 2 formation.

1H and 2D electron nuclear double resonance (ENDOR) and electron spin echo envelope modulation (ESEEM) investigations on γ-irradiated betaine arsenate

1993 ◽  
Vol 171 (3) ◽  
pp. 375-385 ◽  
Author(s):  
A. Pöppl ◽  
G. Völkel ◽  
O. Tober ◽  
A. Klöpperpieper ◽  
J. Hüttermann ◽  
...  
Keyword(s):  
Electron Spin ◽  
Spin Echo ◽  
Double Resonance ◽  
Electron Spin Echo ◽  
Electron Nuclear Double Resonance ◽  
Envelope Modulation

Study of polyacetylene and composites of polyacetylene/polyethylene by electron nuclear double resonance, electron nuclear nuclear triple resonance, and electron spin echo spectroscopies

1983 ◽  
Vol 54 (10) ◽  
pp. 5583-5591 ◽  
Author(s):  
L. R. Dalton ◽  
H. Thomann ◽  
A. Morrobel‐Sosa ◽  
C. Chiu ◽  
M. E. Galvin ◽  
...  
Keyword(s):  
Electron Spin ◽  
Spin Echo ◽  
Double Resonance ◽  
Electron Spin Echo ◽  
Triple Resonance ◽  
Electron Nuclear Double Resonance ◽  
Resonance Electron

scholarly journals Structure of Self-Aggregated Alamethicin in ePC Membranes Detected by Pulsed Electron-Electron Double Resonance and Electron Spin Echo Envelope Modulation Spectroscopies

2009 ◽  
Vol 96 (8) ◽  
pp. 3197-3209 ◽  
Author(s):  
Alexander D. Milov ◽  
Rimma I. Samoilova ◽  
Yuri D. Tsvetkov ◽  
Marta De Zotti ◽  
Fernando Formaggio ◽  
...  
Keyword(s):  
Electron Spin ◽  
Spin Echo ◽  
Double Resonance ◽  
Electron Spin Echo ◽  
Envelope Modulation
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