Electron spin resonance (ESR) is a sensitive tool to detect the electron‐transfer processes in some specified systems from the change of the ESR signals. In this paper, the interaction between poly(N,N‐dimethylaniline) (PDMA) and 1,1‐diphenyl‐2‐picrylhydrazyl (DPPH) was investigated by ESR spectra based on the stability of their radicals in ethanol. It is shown that an electron‐transfer process occurs from nitrogen atoms of PDMA molecules to those of DPPH molecules which makes PDMA form more stable radical cations and eliminates the radicals on DPPH.
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Zheng et al. (1997) studied this question.
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