title: Dinaphthoporphycenes: synthesis and nonlinear optical studies.
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.
authors.affiliation: School of Chemistry, University of Hyderabad, Hyderabad, 500 046, India.
authors.forename: Tridib
authors.initials: T
authors.lastname: Sarma
authors.forename: Pradeepta K
authors.initials: PK
authors.lastname: Panda
authors.forename: P T
authors.initials: PT
authors.lastname: Anusha
authors.forename: S Venugopal
authors.initials: SV
authors.lastname: Rao