期刊
JOURNAL OF MAGNETIC RESONANCE
卷 189, 期 1, 页码 59-77出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jmr.2007.08.004
关键词
simulation of EPR spectrum; slow-motion spectrum; stochastic Lionville equation; one electron spin coupled to two nuclear spins; solution of the radical Mes*(CH3)P-PMeS* [Mes*=2,4,6 (tBU)3C2H2] in tetrahydrofuran; directed signature; threshold directed signature; bilinear pairings; provable security
An algorithm is developed that extends the well known nitroxide slow-motional continuous wave electron paramagnetic resonance (EPR) simulation technique developed originally by Meirovitch et al. [E. Meirovitch, D. Inger, E. Inger, G. Moro, J.H. Freed, J. Chem. Phys. 77 (1982) 3915-3938], and implemented by Schneider and Freed [D.J. Schneider, J.H. Freed, Calculating slow motional magnetic resonance spectra: a user's guide, in: Biological Magnetic Resonance, vol. 6, Plenum Publishing Corporation, 1989]. This paper deals with the more general case of coupling of one electron spin to two nuclear spins. A complete listing of the matrix elements of the Liouville superoperator for this extension has been included. This advance has been successfully tested by reproducing the observed spectral line-shapes of a solution of the novel radical Mes*(CH3)P-PMes* [Mes* = 2,4,6 (tBU)(3)C2H2] in tetrahydrofuran (THF), in which the radical is undergoing slow tumbling, with the coupling of one electron spin to two physically and magnetically inequivalent phosphorus (P-31) nuclei. (C) 2007 Elsevier Inc. All rights reserved.
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