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Abstract
A theoretical study has been made of the influence of hydrodynamic interactions on the mechanism of polarized luminescence and NMR of macromolecules in solution. The depolarization function for the luminescence Y ( T/ n) has been formulated (in which T - the absolute temperature; n - solvent viscosity) and equations have also been obtained for the spin-lattice relaxation time T 1 (in the high frequency range) for chains with strong hydrodynamic interactions, the chain consisting of 10, 30 or 100 segments modelled by a Gaussian sub-chain. The hydrodynamic interactions due to space effects have been found not to affect the shape of the Y ( T/ n) function in the range 1 < Y < 3 and the mol.wt. dependence of mobility (determined by polarizing luminescence) θ ω N for chains with a strong hydrodynamic interaction at small N values shows the behaviour typical of freely permeated chains. The change to the region in which θ ω N is practically independent of N in the presence of the hydrodynamic reaction is at N ≈ 5–6.
Published Version
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