M. Goez
Oct 15, 1990
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Influential Citations
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Abstract
Abstract The cyclic photoreaction between 9,10-anthraquinone and N,N-dimethylaniline (DMA) in acetonitrile- d 3 has been studied between 237 and 296 K by time resolved measurements of chemically induced dynamic nuclear polarization (CIDNP). A generally applicable kinetic treatment including the calculation of absolute CIDNP signal intensifies is presented. For the dimethylamino protons in the donor radicals a mean nuclear spin relaxation time of 103 μs (±25%) was found. An activation energy of 11.3 kJ/mol (±10%) was determined for the degenerate electron exchange between DMA and its radical cation.