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. 2015 Jun 15;54(25):7323-7.
doi: 10.1002/anie.201502285. Epub 2015 May 7.

Stable π Radical from a Contracted Doubly N-Confused Hexaphyrin by Double Palladium Metalation

Yutaka Hisamune  1 , Keiichi Nishimura  1 , Koji Isakari  1 , Masatoshi Ishida  1 , Shigeki Mori  2 , Satoru Karasawa  3 , Tatsuhisa Kato  4 , Sangsu Lee  5 , Dongho Kim  6 , Hiroyuki Furuta  7
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Stable π Radical from a Contracted Doubly N-Confused Hexaphyrin by Double Palladium Metalation

Yutaka Hisamune et al. Angew Chem Int Ed Engl. .

Abstract

A contracted doubly N-confused dioxohexaphyrin derivative served as a dinucleating metal ligand for unsymmetrical coordination. The complexation of two palladium(II) cations led to the formation of π-radical species that were persistent in atmospheric air in the presence of moisture. Effective delocalization of an unpaired electron over the hexaphyrin backbone could contribute to the distinct chemical stability.

Keywords: N-confusion; expanded porphyrins; palladium; stable radicals; two-photon absorption.

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