Charge-transfer complexes of metal dithiolenes. IX. Photoinduced electron transfer within metal dithiolene-viologen ion pairs studied by flash photolysis

摘要: Laser flash excitation of 1/1 ion pairs consisting the reversible redox systems [M(mmt) 2 ] 2- (mnt =maleonitriledithiolate) and V n+ (V=2,2'- or 4,4'-bipyridinium derivative, n=2,1) affords electron-transfer products - (n-1)+ in case M=Pt, while no transients are observed when M=Ni. These primary recombine by a fast second-order back-reaction. The cage escape efficiencies very sensitive to charge quenchers (1.0 for n=1, 0.1 n=2)