Regioselective β-Metalation of <i>meso</i>-Phosphanylporphyrins. Structure and Optical Properties of Porphyrin Dimers Linked by Peripherally Fused Phosphametallacycles
作者:Yoshihiro Matano、Kazuaki Matsumoto、Yoshihide Nakao、Hidemitsu Uno、Shigeyoshi Sakaki、Hiroshi Imahori
DOI:10.1021/ja710542e
日期:2008.4.1
meso-Diphenylphosphanylporphyrins were successfully prepared via Pd-catalyzed C-P cross-coupling reaction of the corresponding meso-iodoporphyrins with diphenylphosphane. The meso-phosphanylporphyrins underwent regioselective metalation at the beta carbon to produce novel classes of porphyrin dimers linked by peripherally fused phosphametallacycles. A Pd-mononucler complex was structurally characterized by X-ray crystallography, which revealed a flat structure of the Pd-linked porphyrin pi systems. Both experimental and theoretical results demonstrate that the orbital interaction between the pyrrolic p pi orbitals and the metal d pi orbital affects optical and electrochemical properties of the metal-linked coplanar porphyrin dimers.