Chromatographically separable ruffled non-planar isomeric octaalkylporphycenes: Consequences of unsymmetrical substitution upon structure and photophysical properties

Abstract

We herein report the first synthesis of two unsymmetrically substituted novel porphycenes, i.e. 2,7,12,13-tetraethyl-9,10,19,20-tetramethyl (OAPo-T) and 2,3,16,17-tetraethyl-9,10,19,20-tetramethyl (OAPo-C) porphycenes, via reductive McMurry coupling of unsymmetrically substituted diacylbipyrrole and isolated them by thin layer chromatography. They exhibit good solubility with a ruffled nonplanar structure and unique photophysical properties, including two photon absorbance.