Abstract
Magnetic field effects on the quantum yields of solvated electron formation in UV excited aqueous solutions of copper(I) cyanides have been investigated by a continuous photolysis technique using nitrate ions as electron scavengers. It has been shown that magnetic fileds induce a considerable decrease in the quantum yield of dicyano copper(I) but have no effect on the yield of the photoredox reaction of the tricyano complex. The difference between quantum yields at the Earth's magnetic flux density is attributed to the rather different electronic spectra of complexes while the external magnetic field effects at increasing magnetic flux densities are interpreted as a consequence of the Landé factor difference caused by spin—orbit coupling in the copper(II) constituent of the primary geminate pair.
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