Synthesis and properties of C-C conjugated phthalocyanine dimers

Abstract Covalently C–C linked Pc–Pc homo-dimers ( ortho and meta ) were synthesized from their corresponding Pc halide precursors using a Pd-catalyzed homo-coupling reaction. Photophysical data reveal energy transfer between the Pc moieties resulting in the appearance of new red-shift Q-bands that correlate to the planarity and dihedral angle between the subunit.