meso-tetra(meso-tetraphenylporphyrinyl)porphyrin, a macrocycle with five covalently linked porphyrin units

✍ Scribed by Olof Wennerström; Harriet Ericsson; Ilona Raston; susanne Svensson; Weston Pimlott

• Book ID: 104232821
• Publisher: Elsevier Science
• Year: 1989
• Tongue: French
• Weight: 258 KB
• Volume: 30
• Category: Article
• ISSN: 0040-4039
• DOI: 10.1016/s0040-4039(01)80378-6

✦ Synopsis

A convenient synthesis of a meso-tetraphenylporphyrin monoaldehyde, lc, is reported. Condensation of this aldehyde with excess benzaldehyde and pyrrole gives the bis-porphyrin 2. A low yield of the title compound, the penta-porphyrin 3 is obtained from lc and pyrrole in refluxing propionic acid.

Recent advances in the understanding of primary photosynthetic processes1 have led to a need of model compounds with two or more closely bonded porphyrin units.2 The rapid progress in molecular electronics and the increasing interest in materials for supermolecular chemistry3 have also inspired us to make molecules in which more than one porphyrin unit is linked by various bridging groups. For this purpose we required a simple and