The temperature dependences of the position of the maxima of the fluorescence and phosphorescence spectra and also the rate of attenuation of the phosphorescence of erythrosin attached to cotton fibres have been measured. Fluorescing and phosphorescing probes reveal the presence of a whole number of molecular dynamic effects in the cotton fibre. At 100 K the molecular motions of the electric dipoles of cotton fibre surrounding the probe with relaxation times of the order of milliseconds were recorded reaching nanoseconds at room temperature. In the system studied appreciable microheterogeneity for the free activation energies of the molecular motions, described by a Gaussian function with a halfwidth ~15 kJ/mole, was observed.
|Number of pages||6|
|Journal||Biophysics (Russian Federation)|
|State||Published - 1 Dec 1988|
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