Conformation dynamics of non-, singly- and doubly-N-fused [28]hexaphyrins revealed by photophysical studies

Chem Commun (Camb). 2011 Apr 7;47(13):3960-2. doi: 10.1039/c0cc05822j. Epub 2011 Feb 21.

Abstract

Conformational flexibility and balance between Möbius aromatic and Hückel antiaromatic conformers in [28]hexaphyrins depend on N-fused structure and meso-aryl substituents, revealed by various spectroscopic methods. In particular, the existence of the two conformers has been confirmed for singly-N-fused [28]hexaphyrins by femtosecond time-resolved transient absorption spectroscopy.