Dinaphthoporphycenes: synthesis and nonlinear optical studies

Org Lett. 2011 Jan 21;13(2):188-91. doi: 10.1021/ol102378g. Epub 2010 Dec 17.

Abstract

Naphthobipyrrole-derived porphycenes are synthesized for the first time via McMurry coupling of the β-alkylated 2,9-diformylnaphthobipyrrole derivatives, which in turn were prepared easily from 2,3-naphthalene bishydrazine in four steps. Insertion of nickel into the porphycene core results in transformation of the rectangular N4-core into a square type geometry owing to the fusion of naphthalene moiety onto the bipyrrole entities. These porphycenes show large, intensity dependent three-photon absorption.