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We report the efficient synthesis of tetrabicycloporphyrin platinum under mild conditions (60°C). The platinum complexes were heated under vacuum to give π-extended platinum porphyrins in 100% yield. The porphyrins are expected to have interesting properties such as high-quantum-efficiency near-IR phosphorescence and large absorptivity in the near-IR region.
We report the efficient synthesis of tetrabicycloporphyrin titanyl and vanadyl without decomposition of the bicyclo[2.2.2]octadiene unit. The complexes were heated under vacuum to give titanyl and vanadyl tetrabenzoporphyrins in 100% yield. We also titanylated and vanadylated tetra[2,3]naphthoporphyrin and tetra[2,3]anthraporphyrin, which have a greater degree of π conjugation than tetrabenzoporphyrin.
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