Synthesis and Characterization of Novel Fused Porphyrinoids

meso-meso, β-β, β-β Triply linked porphyrin arrays (porphyrin tapes) have been extensively studied in the last decade owing to their remarkable physical properties such as extremely red-shifted absorption bands reaching up to IR region and large two-photon absorption cross-sections. Recently, hybrid porphyrin tapes have emerged as novel promising molecular motifs by realizing ample chemical stabilities and good solubilities in common organic solvents. Synthesis of porphyrin-hexaphyrin hybrid tape has been also achieved and the unique property has been revealed. In other cases, various aromatic segments have been fused onto the porphyrin or hexaphyrin periphery to create fused porphyrinoids. These novel fused porphyrinoids are promising molecules as near-infrared(NIR)-absorbing dyes, pointing to future applications such as conducting wire, NIR emitter, photovoltaics, and nonlinear optical materials.