The singlet-triplet energy gap in CS states

The reason for the very different values of these damping factors may be explained by noting that 3/3 for triplet CR is determined by two quantities, namely the product IV P-FCWD for the triplet CR rate (see equation (3)), and the frequency, wise, of isc which determines the population of the triplet CS state. 

The singlet triplet energy gap, A/isx. in organic biradicals35 182 183 and (inter-molecular) radical ion pairs184-190 has been shown to be a useful indicator of electronic coupling in ET and excitation energy transfer (EET) processes.191-194 

ORBITAL INTERACTIONS AND LONG-RANGE ELECTRON TRANSFER 

The experimental and calculated /3ST values of 0.79 and 0.92 bond-1 for the distance dependence of AEST for the +DMN[ i]DCV- series of CS states corresponds closely to the average experimental ft value of 0.92 bond- for a variety of ET processes occurring in the same series of molecules, DMN[h]DCV = 18(w). Thus, the average values are  

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