title: Quantification of the singlet-singlet annihilation times of individual bichromophoric molecules by photon coincidence measurements.
abstract: Singlet-singlet annihilation (SSA) times in individual bichromophoric molecules have been quantified by time-resolved photon coincidence measurements. An analytical expression has been derived to obtain the SSA times from the coincidence histograms. The results have been confirmed by Monte Carlo simulations. SSA was found to be about three times faster than the fluorescence lifetime of the chromophores. Considering the spectral overlap for SSA and for energy transfer from an excited to a ground state chromophore, we conclude that in the weak coupling limit for any arrangement of the two chromophores both processes occur on similar time scales.
authors.affiliation: Institut für Physikalische Chemie, Johannes Gutenberg-Universität Mainz, Germany.
authors.forename: Burkhard
authors.initials: B
authors.lastname: Fückel
authors.forename: Gerald
authors.initials: G
authors.lastname: Hinze
authors.forename: Fabian
authors.initials: F
authors.lastname: Nolde
authors.forename: Klaus
authors.initials: K
authors.lastname: Müllen
authors.forename: Thomas
authors.initials: T
authors.lastname: Basché