Fully Functionalizable β,β′-BODIPY Dimer: Synthesis, Structure, and Photophysical Signatures

The versatility in the synthesis
of BODIPY derivatives in terms of functionalization is further demonstrated.
In particular, in this work β–β′-BODIPY
dimers with varied functional groups in the meso positions were synthesized
in very efficient yields and short reaction times from a single platform.
A photophysical study was carried out in all of the compounds. The
resultant dimers show absorption bands at around 600 nm as a consequence
of electronically coupled monomers disposed with a dihedral angle
of around 30°, which is supported by theoretical simulations.
The emission properties of these molecules are distinguished by the
appearance of an ICT state as the polarity of the solvent increases.