Abstract
Spin-exchange broadening in solution electron paramagnetic resonance spectra of spin-carrying counterions of poly(diallyldimethylammonium chloride) is analyzed in terms of the radial counterion distribution around the polyelectrolyte chain. For mixtures of water with organic solvents of lower and higher permittivity, the data agree with a scaling of the radial distribution function close to r−2. For low polyelectrolyte concentrations in pure water the line shapes disagree with such scaling.