Ultrafast charge separation and driving force dependence in cyclophane-bridged Zn-porphyrin-quinone molecules

摘要: The rate of charge separation in a series cyclophane-bridged Zn−porphyrin−quinone systems has been investigated nonpolar and polar solvents by means fluorescence upconversion. In all with driving forces the range 0.3−1.3 eV, ultrafast occurs constant (2−5) × 1012 s-1. combination previous investigations on free-base porphyrin−quinone force dependence can be probed from (slightly endoergic) normal to moderately inverted region for alone. (more limited) data recombination these are reasonably well reproduced same reorganization energies electronic couplings that result analysis separation. allow, first time, satisfactory quantum mechanical alone and, consequently, testing assumption comparability ch...