Poly-halogenated aza-bodipy dyes with improved solubility as a versatile synthetic platform for the design of photonic materials

The optimization of the solubility in organic solvents of halogenated aza-dipyrromethenes was achieved by substitution of the upper phenyl moieties by branched long alkoxy chains ( 1f ) or by using an OMe-OHex-OMe pattern ( 1h ). These results allowed us to prepare original tetra-halogenated aza-dipyrromethenes that were used as a synthetic platform to access highly functionalized aza-bodipy dyes for various potential applications including PDT, imaging, or nonlinear optics. The optimization of the solubility in organic solvents of halogenated aza-dipyrromethenes was achieved by substitution of the upper phenyl moieties by branched long alkoxy chains ( 1f ) or by using an OMe-OHex-OMe pattern ( 1h ).