title: Kinetic studies on visible-light-switchable photochromic fluorophores based on diarylethenes.
abstract: We present three recently developed photochromic fluorophores that are based on diarylethenes with elongated conjugated π-systems. The diarylethenes 1 and 3 can be switched from their open to their closed form with visible light. The diarylethenes 1 and 2 are covalently coupled to a standard rhodamine B-based fluorophore and act as photoswitchable resonance energy acceptors. By controlling their switching state, the fluorescence intensity of the dye can be modulated. The third compound 3 is a diarylethene that shows photoswitchable inherent fluorescence due to its stilbazolium-like structure. Ensemble experiments demonstrate that diarylethene-based photoswitches show superior characteristics regarding their switching performance, thermal stability and fatigue resistance. These attributes make them promising candidates for super-resolution imaging methods that are based on the determinate fluorescence switching of fluorophores between an off- and an on-state.
authors: Angewandte Laserphysik und Laserspektroskopie, Universität Bielefeld, Germany. seefeldt@physik.uni-bielefeld.de
authors: Britta
authors: B
authors: Seefeldt
authors: Kai
authors: K
authors: Altenhöner
authors: Oliver
authors: O
authors: Tosic
authors: Thomas
authors: T
authors: Geisler
authors: Markus
authors: M
authors: Sauer
authors: Jochen
authors: J
authors: Mattay