Characterization of free radicals from vitamin K1 and menadione by 2 mm-band EPR, ENDOR and ESEEM

M. K. Bowman; M. C. Thurnauer; J. R. Norris; S. A. Dikanov; V. I. Gulin; A. M. Tyryshkin; R. I. Samoilova; Yu D. Tsvetkov

doi:10.1007/BF03166703

Characterization of free radicals from vitamin K₁ and menadione by 2 mm-band EPR, ENDOR and ESEEM

M. K. Bowman
, M. C. Thurnauer
, J. R. Norris
, S. A. Dikanov
, V. I. Gulin
, A. M. Tyryshkin
, R. I. Samoilova
, Yu D. Tsvetkov

Research output: Contribution to journal › Article › peer-review

Abstract

The anion and cation radicals of vitamin K₁ and its analog menadione were characterized using the magnetic resonance techniques of Electron Nuclear Double Resonance (ENDOR), Electron Spin Echo Envelope Modulation (ESEEM), and Electron Paramagnetic Resonance (EPR) at X-band and 2 mm-band. The g-factor anisotropy of the radicals at 2 mm-band allow them to be distinguished from each other in the solid state. The g-factor matrix of the radical anion of vitamin K₁ is virtually identical with that reported for the reduced A₁ acceptor in green plant photosystem I thus demonstrating that reduced A₁ is the anion radical of vitamin K₁.

Original language	English (US)
Pages (from-to)	353-368
Number of pages	16
Journal	Applied Magnetic Resonance
Volume	3
Issue number	2
DOIs	https://doi.org/10.1007/BF03166703
State	Published - Apr 1992
Externally published	Yes

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics

Online availability

10.1007/BF03166703

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Cite this

@article{41bf896b075b46668b564f2b8d915a57,

title = "Characterization of free radicals from vitamin K1 and menadione by 2 mm-band EPR, ENDOR and ESEEM",

abstract = "The anion and cation radicals of vitamin K1 and its analog menadione were characterized using the magnetic resonance techniques of Electron Nuclear Double Resonance (ENDOR), Electron Spin Echo Envelope Modulation (ESEEM), and Electron Paramagnetic Resonance (EPR) at X-band and 2 mm-band. The g-factor anisotropy of the radicals at 2 mm-band allow them to be distinguished from each other in the solid state. The g-factor matrix of the radical anion of vitamin K1 is virtually identical with that reported for the reduced A1 acceptor in green plant photosystem I thus demonstrating that reduced A1 is the anion radical of vitamin K1.",

author = "Bowman, \{M. K.\} and Thurnauer, \{M. C.\} and Norris, \{J. R.\} and Dikanov, \{S. A.\} and Gulin, \{V. I.\} and Tyryshkin, \{A. M.\} and Samoilova, \{R. I.\} and Tsvetkov, \{Yu D.\}",

year = "1992",

month = apr,

doi = "10.1007/BF03166703",

language = "English (US)",

volume = "3",

pages = "353--368",

journal = "Applied Magnetic Resonance",

issn = "0937-9347",

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T1 - Characterization of free radicals from vitamin K1 and menadione by 2 mm-band EPR, ENDOR and ESEEM

AU - Bowman, M. K.

AU - Thurnauer, M. C.

AU - Norris, J. R.

AU - Dikanov, S. A.

AU - Gulin, V. I.

AU - Tyryshkin, A. M.

AU - Samoilova, R. I.

AU - Tsvetkov, Yu D.

PY - 1992/4

Y1 - 1992/4

N2 - The anion and cation radicals of vitamin K1 and its analog menadione were characterized using the magnetic resonance techniques of Electron Nuclear Double Resonance (ENDOR), Electron Spin Echo Envelope Modulation (ESEEM), and Electron Paramagnetic Resonance (EPR) at X-band and 2 mm-band. The g-factor anisotropy of the radicals at 2 mm-band allow them to be distinguished from each other in the solid state. The g-factor matrix of the radical anion of vitamin K1 is virtually identical with that reported for the reduced A1 acceptor in green plant photosystem I thus demonstrating that reduced A1 is the anion radical of vitamin K1.

AB - The anion and cation radicals of vitamin K1 and its analog menadione were characterized using the magnetic resonance techniques of Electron Nuclear Double Resonance (ENDOR), Electron Spin Echo Envelope Modulation (ESEEM), and Electron Paramagnetic Resonance (EPR) at X-band and 2 mm-band. The g-factor anisotropy of the radicals at 2 mm-band allow them to be distinguished from each other in the solid state. The g-factor matrix of the radical anion of vitamin K1 is virtually identical with that reported for the reduced A1 acceptor in green plant photosystem I thus demonstrating that reduced A1 is the anion radical of vitamin K1.

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