The Influence of Environmental Effects on Excited-State Lifetimes. The Effect of Ion Pairing on Metal-to-Ligand Charge Transfer Excited States

Article abstract of DOI:10.1021/j100253a010

Excited-state emission and lifetimes are reported for the complexes Os(phen)3²⁺ and Os(4,4'-Ph2phen)3²⁺ (phen is 1,10-phenanthroline; 4,4'-Ph2phen is 4,4'-diphenyl-1,10-phenanthroline) as a function of counterion in CH2Cl2 solution.The changes in nonradiative decay rate constants are observed to vary with changes in emission energy maxima as predicted by the energy gap law.The variations in emission energies and through them the decay rates appear to be induced by changes in ion-dipole interactions in the excited state.