ABSTRACT
Characterization of the photophysical parameters for three perylene bisimide derivatives is presented. We exploited time-resolved and steady-state spectroscopy on both ensembles and single molecules under ambient as well as cryogenic (1.4 K) conditions. The finding is that these chromophores show extraordinary high fluorescence-emission rates, low intersystem crossing yields to the triplet state, and relatively short triplet lifetimes.
Subject(s)
Materials Testing/methods , Nanostructures/analysis , Nanostructures/chemistry , Nanotechnology/methods , Organic Chemicals/analysis , Organic Chemicals/chemistry , Spectrometry, Fluorescence/methods , Macromolecular Substances/analysis , Macromolecular Substances/chemistry , Optics and PhotonicsABSTRACT
We present a detailed study of the photophysical properties of a tetraphenoxy-substituted perylene bisimide derivative. The probe molecules were immobilized in a Shpol'skii matrix of hexadecane and investigated by single-molecule spectroscopy at cryogenic temperatures. By using single-molecule spectroscopic techniques we reveal the triplet substate kinetics and the fluorescence quantum yield, and we provide an estimate for the S1-S0 transition dipole moment.
