We review recent progress in characterizing and understanding the photophysics of single
molecules in condensed matter, mostly at cryogenic temperatures. We discuss the central …

In this work, we have designed and synthesized the compound Ratio-HPSSC, based on a
tetrakis (4-hydroxyphenyl) porphyrin–coumarin scaffold, as a new ratiometric fluorescent …

We theoretically demonstrate a strong dependence of the annihilation rate between (singlet)
excitons on the sign of dipole–dipole couplings between molecules. For molecular H …

Exciton annihilation dynamics in a disordered organic model system is investigated by
ultrafast absorption spectroscopy. We show that the temporal evolution of the exciton density …

We investigate photoblinking and photobleaching of perylene diimide (PDI) and its higher
homologue terrylene diimide (TDI). Single molecule fluorescence trajectories of the dye …

Photon antibunching is ubiquitously observed in light emitted from quantum systems but is
usually associated only with the lowest excited state of the emitter. Here, we devise a …

A combined experimental and theoretical study shows a significant barrier (ca. 100 kJ/mol)
to rotation through the interchromophoric carbon–carbon single covalent (1.49 Å) bond …

Single-molecule Förster resonance energy transfer (FRET) experiments are an important
method for probing biomolecular structure and dynamics. The results from such experiments …

Electronic energy transfer (EET) between chromophores is of fundamental importance for
many biological processes and optoelectronic devices. However, common models fall short …

Singlet− singlet annihilation (SSA) times in individual bichromophoric molecules have been
quantified by time-resolved photon coincidence measurements. An analytical expression …