Exploitation of synthetic methods for highly conjugated compounds and evaluation of their properties

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We investigated synthesis of pi-system-fused porphyrin oligomers, bisthiaporphyrin, cyclo[n]pyrroles, picenes, [5]helicenes, bisBODIPYs, and naphth[2,3-f]isoindoles mainly based on the pericyclic cycloreversion as the key step and analyzed their electronic properties. The two-photon absorption property of pi-system-fused porphyrin oligomers is proven to be affected not by the numbers but mostly by the shapes of their pi systems. Stable bisBODIPYs bearing strong absorptions only in the NIR region have been explored.