[Manifestation of the structural phase transitions of lipid bilayers in the ESR spectrum of s-ions in the electron state].
The mechanism of S-ion line width for the tetrahonal cubic complex which was formed by lipids of the lipid bilayer at phase transition is considered. Within the framework of the one-dimensional model of domain walls or kinks created in the phase separation regions of the bilayer the spectral density of crystal field fluctuation of S-ion by radial distortion of the paramagnetic complex is calculated. If the modulation frequencies of an axial component of the crystal field are near the two-fold frequency of ESR, it is possible to reveal the characteristic band of narrowing and broadening of ESR line width for binding S-ions in the bilayer. The proposed theoretical model can be useful in the explanation of experimental values of ESR line width of S-ions binding in plankton. Characteristic parameters of kinks are estimated.
Pasynkov
A S
AS
Kopvillem
U Kh
UKh
D004578:Electron Spin Resonance Spectroscopy; D008051:Lipid Bilayers; D008962:Models, Theoretical; D013113:Spin Labels
D008051:Lipid Bilayers; D013113:Spin Labels
Proiavlenie strukturnykh fazovykh prevrashcheniĭ lipidnogo bisloia v spektre EPR s-iona v élektronnom sostoianii.