ESTIMATION OF LIFETIMES OF SOLVENT RADICAL CATIONS IN LIQUID ALKANES USING THE LEVEL-CROSSING SPECTROSCOPY TECHNIQUE

The technique of radical ion pair level crossing spectroscopy was empl oyed to obtain the electron spin resonance spectrum parameters of solv ent radical cations for a series of Linear nonviscous alkanes (pentane to hexadecane) at room temperature. The spectra consist of a single h omogeneous line that becomes broader as the carbon chain of the alkane molecule becomes shorter. Effective hyperfine interactions in radical cations are negligible. The lower estimates for the lifetimes of radi cal cations were obtained. Assuming that the contribution of spin rela xation to the line width is not reserved.