Fusing Porphyrins and Phospholes: Synthesis and Analysis of a Phosphorus‐Containing Porphyrin

A phosphole‐fused porphyrin dimer, as a representative of a new class of porphyrins with a phosphorus atom, was synthesized for the first time. The porphyrin dimer exhibits remarkably broadened absorption, indicating effective π‐conjugation over the two porphyrins through the phosphole moiety. The porphyrin dimer possesses excellent electron‐accepting character, which is comparable to that of a representative electron‐accepting material, 60]PCBM. These results provide access to a new class of phosphorus‐containing porphyrins with unique optoelectronic properties.