α-Fused dithienyl BODIPYs synthesized by oxidative ring closure.
Both symmetrical and unsymmetrical α-fused dithienyl-BODIPY dyes have been prepared by oxidative ring closure induced by anhydrous FeCl3. Extension of the π-system in the fused BODIPY leads to a progressive shift to 579 and 665 nm respectively for the absorption wavelength maxima of the mono- and difused dyes relative to the unfused species (λ(abs) = 502 nm). Linking such dyes to an NIR emitting module provides a panchromatic chromophore with a large absorption cross section in the visible range associated with efficient intramolecular cascade energy transfer.
Laboratoire de Chimie Organique et de Spectroscopies Avancées (ICPEES-LCOSA), UMR 7515 CNRS, 25 rue Becquerel, 67087 Strasbourg Cedex 2, France.
Elodie
E
Heyer
Pascal
P
Retailleau
Raymond
R
Ziessel