Orientation-Selected 95 GHz High-Field ENDOR Spectroscopy of Randomly Oriented Plastoquinone Anion Radicals

Rohrer, M., Plato, M., Macmillan, F., Grishin, Y., Lubitz, W. and Mobius, K. (1995) Orientation-Selected 95 GHz High-Field ENDOR Spectroscopy of Randomly Oriented Plastoquinone Anion Radicals. Journal of Magnetic Resonance, Series A, 116 (1). pp. 59-66. ISSN 1064-1858

Full text not available from this repository. (Request a copy)

Abstract

Recent improvements of a 3 mm high-field/high-frequency CW EPR/ENDOR spectrometer [O. Burghaus, M. Rohrer, T. Götzinger, M. Plate, and K. Möbius, Meas. Sci. Technol.3, 765 (1992)] are presented, making it possible for ENDOR measurements to be performed with NMR radiofrequeney fields of more than 2.5 mT (rotating frame) over a frequency range of 40 MHz. Applications of this setup to plastosemiquinone anion radicals are described which serve as a model for the secondary electron acceptor in plant photosystem II. The orientation-selected high-field ENDOR spectra of the plastoquinone anion radicals, recorded at different EPR field positions, are analyzed with the aid of computer simulations. The determination of hyperfine interactions of the radical in a perdeuterated solvent is described. The experiments demonstrate the potential of high-field/high-frequency EPR/ENDOR in structure determination including anisotropic interactions with the environment.

Item Type: Article
Faculty \ School: Faculty of Science > School of Chemistry
University of East Anglia > Faculty of Science > Research Groups > Biophysical Chemistry
Related URLs:
Depositing User: Pure Connector
Date Deposited: 21 Jan 2015 11:28
Last Modified: 25 Jul 2018 10:24
URI: https://ueaeprints.uea.ac.uk/id/eprint/51833
DOI: 10.1006/jmra.1995.1189

Actions (login required)

View Item