Electron Spin Echo Envelope Modulation Study of Vanadyl Complexes.
نویسندگان
چکیده
منابع مشابه
A new mechanism for electron spin echo envelope modulation.
Electron spin echo envelope modulation (ESEEM) has been observed for the first time from a coupled heterospin pair of electron and nucleus in liquid solution. Previously, modulation effects in spin-echo experiments have only been described in liquid solutions for a coupled pair of homonuclear spins in nuclear magnetic resonance or a pair of resonant electron spins in electron paramagnetic reson...
متن کاملComparison of the electron spin echo envelope modulation (ESEEM) for human lactoferrin and transferrin complexes of copper(II) and vanadyl ion.
Copper(II) and vanadyl ions were bound to human milk lactoferrin or serum transferrin with carbonate or oxalate as the synergistic anion. Electron spin echo envelope modulation (ESEEM) due to nitrogen of a coordinated histidine imidazole was observed for both the copper and vanadyl complexes. For both metals, the modulation frequencies in the Fourier transforms of the data were similar for the ...
متن کاملRabi oscillation and electron-spin-echo envelope modulation of the photoexcited triplet spin system in silicon
Waseem Akhtar,1 Takeharu Sekiguchi,1 Tatsumasa Itahashi,1 Vasileia Filidou,2 John J. L. Morton,2,3 Leonid Vlasenko,4 and Kohei M. Itoh1,* 1School of Fundamental Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan 2Department of Materials, University of Oxford, Parks Road, Oxford OXI 3PH, United Kingdom 3London Centre for Nanotechnology, University Colleg...
متن کامل5- and 6-pulse electron spin echo envelope modulation (ESEEM) of multi-nuclear spin systems.
In 3-pulse ESEEM and the original 4-pulse HYSCORE, nuclei with large modulation depth (k approximately 1) suppress spectral peaks from nuclei with weak modulations (k approximately 0). This cross suppression can impede the detection of the latter nuclei, which are often the ones of interest. We show that two extended pulse sequences, 5-pulse ESEEM and 6-pulse HYSCORE, can be used as experimenta...
متن کاملIntramembrane water associated with TOAC spin-labeled alamethicin: electron spin-echo envelope modulation by D2O.
Alamethicin is a 20-residue, hydrophobic, helical peptide, which forms voltage-sensitive ion channels in lipid membranes. The helicogenic, nitroxyl amino acid TOAC was substituted isosterically for Aib at residue positions 1, 8, or 16 in a F50/5 alamethicin analog to enable EPR studies. Electron spin-echo envelope modulation (ESEEM) spectroscopy was used to investigate the water exposure of TOA...
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ژورنال
عنوان ژورنال: Journal of the Spectroscopical Society of Japan
سال: 1994
ISSN: 1884-6785,0038-7002
DOI: 10.5111/bunkou.43.292