Librational motion of guest spin probe molecules in glassy media
作者： S.A. Dzuba
DOI: 10.1016/0375-9601(96)00081-3
关键词: Spin probe 、 Electron paramagnetic resonance 、 Spin (physics) 、 Amplitude 、 Molecular physics 、 Condensed matter physics 、 Nitroxide mediated radical polymerization 、 Molecule 、 Glass transition 、 Spectral line 、 Physics
摘要: Abstract Echo-detected (ED) EPR spectra of nitroxide spin probes dissolved in glassy materials evidence that guest molecules these media undergo fast librational motion. The mean square amplitude 〈 α 2 〉 this motion can be simply derived from continous wave (CW) by measuring the field separation between two outer spectral peaks. By comparing ED and CW data correlation time τ c could evaluated. Above glass transition temperature was found to increase sharply.
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sci-hub.se 参考文章(28)
W. Andrew Phillips, A. C. Anderson, Amorphous solids : low-temperature properties Springer-Verlag. ,(1981)
Nobuaki Ohta, Keiji Kuwata, ESR study on rotational motions of some free radicals in the supercooled and glassy organic solvents The Journal of Chemical Physics. ,vol. 82, pp. 3420- 3429 ,(1985) , 10.1063/1.448919
S. A. Dzyuba, Yu. D. Tsvetkov, Molecular motion in supercooled liquids and glasses Journal of Structural Chemistry. ,vol. 28, pp. 343- 363 ,(1987) , 10.1007/BF00753815
A. Tokmakoff, M. D. Fayer, Homogeneous vibrational dynamics and inhomogeneous broadening in glass-forming liquids: Infrared photon echo experiments from room temperature to 10 K Journal of Chemical Physics. ,vol. 103, pp. 2810- 2826 ,(1995) , 10.1063/1.470517
Gyan P. Johari, Martin Goldstein, Viscous Liquids and the Glass Transition. II. Secondary Relaxations in Glasses of Rigid Molecules Journal of Chemical Physics. ,vol. 53, pp. 2372- 2388 ,(1970) , 10.1063/1.1674335
Shui Pong Van, G.Bruce Birrell, O.Hayes Griffith, Rapid anisotropic motion of spin labels. models for motion averaging of the ESR parameters Journal of Magnetic Resonance. ,vol. 15, pp. 444- 459 ,(1974) , 10.1016/0022-2364(74)90147-4
S. A. Dzuba, Ye. A. Golovina, Yu. D. Tsvetkov, Spin-probe EPR study of some sugars in connection with desiccation tolerance of biological objects Applied Magnetic Resonance. ,vol. 5, pp. 31- 37 ,(1993) , 10.1007/BF03162470
J. L. Green, C. A. Angell, Phase relations and vitrification in saccharide-water solutions and the trehalose anomaly The Journal of Physical Chemistry. ,vol. 93, pp. 2880- 2882 ,(1989) , 10.1021/J100345A006
A. J. Dianoux, W. Petry, D. Richter, Dynamics of disordered materials II Neutron News. ,vol. 4, pp. 13- 14 ,(1989) , 10.1080/10448639308218958
S.A Dzuba, A.G Maryasov, K.M Salikhov, Yu.D Tsvetkov, Superslow rotations of nitroxide radicals studied by pulse EPR spectroscopy Journal of Magnetic Resonance (1969). ,vol. 58, pp. 95- 117 ,(1984) , 10.1016/0022-2364(84)90010-6