Ir(III)-Naphthoquinone complex as a platform for photocatalytic activity

Walter D. Guerra; Hannah J. Sayre; Hunter H. Ripberger; Emmanuel Odella; Gregory D. Scholes; Thomas A. Moore; Robert R. Knowles; Ana L. Moore

Journal of Photochemistry and Photobiology (Mar 2022)

Ir(III)-Naphthoquinone complex as a platform for photocatalytic activity

Walter D. Guerra,
Hannah J. Sayre,
Hunter H. Ripberger,
Emmanuel Odella,
Gregory D. Scholes,
Thomas A. Moore,
Robert R. Knowles,
Ana L. Moore

Affiliations

Walter D. Guerra: School of Molecular Sciences, Arizona State University, Tempe, AZ 85287, USA; Corresponding author at: School of Molecular Sciences, Arizona State University, Tempe, Arizona 85287, USA.
Hannah J. Sayre: Department of Chemistry, Princeton University, Princeton, New Jersey 08544, USA
Hunter H. Ripberger: Department of Chemistry, Princeton University, Princeton, New Jersey 08544, USA
Emmanuel Odella: School of Molecular Sciences, Arizona State University, Tempe, AZ 85287, USA
Gregory D. Scholes: Department of Chemistry, Princeton University, Princeton, New Jersey 08544, USA
Thomas A. Moore: School of Molecular Sciences, Arizona State University, Tempe, AZ 85287, USA
Robert R. Knowles: Department of Chemistry, Princeton University, Princeton, New Jersey 08544, USA; Corresponding author at: Department of Chemistry, Princeton University, Princeton, New Jersey 08544, USA.
Ana L. Moore: School of Molecular Sciences, Arizona State University, Tempe, AZ 85287, USA; Corresponding author at: School of Molecular Sciences, Arizona State University, Tempe, Arizona 85287, USA.

Journal volume & issue: Vol. 9
p. 100098

Abstract

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Inspired by the primary events that take place in Photosystem II (PSII), we designed and synthesized a heteroleptic Ir(III) complex featuring an attached naphthoquinone (NQ) as an electron transfer (ET) auxiliary reminiscent of the plastoquinone electron acceptor in PSII. In this design, NQ is covalently attached to the 2,2′-bipyridyl (bpy) ligand of [Ir(dF(CF3)ppy)2(bpy)][PF6], (dF(CF3)ppy = 2-(2,4-difluorophenyl)-5-(trifluoromethyl)pyridine). Following excitation of the photocatalyst ([Ir(dF(CF3)ppy)2(bpy-NQ)][PF6]), reduced NQ (NQ•‒) was observed in transient absorption spectroscopy. This novel catalyst has potential applications in oxidative and reductive photocatalytic processes.

Published in Journal of Photochemistry and Photobiology

ISSN: 2666-4690 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Science: Chemistry
Website: https://www.journals.elsevier.com/journal-of-photochemistry-and-photobiology

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