Linear and non-linear Electron Spin Resonance spectroscopies have been designed to study the decay of the orientation correlations on different time scales. The reorientation of radicals (<<spin probes>>) dissolved in host phases (in the present case a polymeric liquid crystal (PLC)) may be investigated in the time window 10(-11)-10(-5) s. Evidence of the non-exponential regression of fluctuations is given. The temperature dependence of the correlation time of the spin probe orientation is discussed in the case of semi-crystalline PLCs and contrasted with the case of amorphous PLCs.
Autori interni: | |
Autori: | ANDREOZZI L ; GIORDANO M ; LEPORINI D |
Titolo: | A LINEAR AND NONLINEAR ELECTRON-SPIN-RESONANCE STUDY OF ORIENTATIONAL RELAXATION IN SEMICRYSTALLINE POLYMERIC LIQUID-CRYSTALS |
Anno del prodotto: | 1994 |
Digital Object Identifier (DOI): | 10.1007/BF02456724 |
Appare nelle tipologie: | 1.1 Articolo in rivista |
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