title: Terpyridine-porphyrin hetero-Pacman compounds.
abstract: The two different coordination spheres afforded by Pacman architectures offer cooperativity derived from two different metal centers. A modular strategy is developed to produce a hetero-Pacman scaffold featuring a porphyrin and terpyridine for metal-ion binding. A double Suzuki reaction was employed to first attach a terpyridine moiety to a xanthene backbone and then attach a porphyrin. The new hetero-Pacman scaffold has been characterized and all building blocks have been isolated and structurally characterized. The principle objective to incorporate different metal centers was confirmed by isolating a trinuclear complex comprising two porphyrinic units and a bis(terpyridine)-iron unit. The compounds described herein expand the Pacman scaffold concept by allowing for the incorporation of a terpyridine-metal complex proximate to a porphyrin-cofactor active site for small-molecule activation.
authors.affiliation: Institut für Chemie, Humboldt-Universität zu Berlin, Brook-Taylor-St. 2, 12489 Berlin, Germany. matthias.schwalbe@hu-berlin.de
authors.forename: Matthias
authors.initials: M
authors.lastname: Schwalbe
authors.forename: Ramona
authors.initials: R
authors.lastname: Metzinger
authors.forename: Thomas S
authors.initials: TS
authors.lastname: Teets
authors.forename: Daniel G
authors.initials: DG
authors.lastname: Nocera