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

Journal Article · · Journal of Photochemistry and Photobiology

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. Here, this novel catalyst has potential applications in oxidative and reductive photocatalytic processes.

Research Organization:
Arizona State Univ., Tempe, AZ (United States); Energy Frontier Research Centers (EFRC) (United States). Bioinspired Light-Escalated Chemistry (BioLEC); Princeton Univ., NJ (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0019370
OSTI ID:
1836849
Journal Information:
Journal of Photochemistry and Photobiology, Journal Name: Journal of Photochemistry and Photobiology Vol. 9; ISSN 2666-4690
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

References (60)

A Biomimetic Model of the Electron Transfer between P680 and the TyrZ-His190 Pair of PSII journal February 2005
Iridium(III) Anthraquinone Complexes as Two-Photon Phosphorescence Probes for Mitochondria Imaging and Tracking under Hypoxia journal May 2016
Binding Modes in Metal Ion Complexes of Quinones and Semiquinone Radical Anions: Electron-Transfer Reactivity journal March 2006
Electrochemical studies of ruthenium compounds part I. Ligand oxidation levels journal July 1989
Unique properties of transition metal quinone complexes of the MQ3 series journal October 2001
Oxidative-addition of o-quinones to ruthenium complexes journal July 1971
Coordinatively unsaturated o-quinone complexes of iridum(III) and their role in the isomerization of octahedral complexes journal October 1978
A carotenoid-porphyrin-diquinone tetrad: synthesis, electrochemistry and photoinitiated electron transfer journal January 1989
Synthesis, characterization and reactivity of a ruthenium-quinone complex journal January 1994
Electron distribution within bis(quinone)ruthenium complexes. Structural characterization on delocalized (bipyridine)bis(quinone)ruthenium and on the localized trans-bis(3-chloropyridine)bis(3,5-di-tert-butyl-1,2-semiquinone)ruthenium(III) cation journal January 1990
Discovery of Unforeseen Energy-Transfer-Based Transformations Using a Combined Screening Approach journal August 2019
Facile synthesis and complete characterization of homoleptic and heteroleptic cyclometalated Iridium(III) complexes for photocatalysis journal January 2015
Synthesis, characterization and theoretical studies of ruthenium(II) complexes with the quinone functionalized polypyridine ligand, Nqphen journal May 2012
Synthetic Applications of Proton-Coupled Electron Transfer journal July 2016
Rhenium Complex with Noninnocent Dioxolene Ligand: Combined Experimental and ab Initio Study of [(3,5-di- tert -Bu 2 C 6 H 2 O 2 )ReCl 3 (OPPh 3 )] journal July 2015
Blue Phosphorescence with High Quantum Efficiency Engaging the Trifluoromethylsulfonyl Group to Iridium Phenylpyridine Complexes journal November 2019
Dual Luminescence, Interligand Decay, and Nonradiative Electronic Relaxation of Cyclometalated Iridium Complexes in Solution journal July 2016
A Detailed Evaluation for the Nonradiative Processes in Highly Phosphorescent Iridium(III) Complexes journal February 2018
Heteroleptic Ir(III)N 6 Complexes with Long-Lived Triplet Excited States and in Vitro Photobiological Activities journal January 2019
Molecular mimicry of photosynthetic energy and electron transfer journal April 1993
Mimicking Photosynthetic Solar Energy Transduction journal January 2001
Single-Layer Electroluminescent Devices and Photoinduced Hydrogen Production from an Ionic Iridium(III) Complex journal October 2005
Photoinduced electron transfer in supramolecular systems for artificial photosynthesis journal May 1992
Structure and bonding in bis(quinone) complexes of ruthenium. Synthesis and characterization of the Ru(PPh3)2(SQ)2 (SQ = 3,5-tert-butylsemiquinone, tetrachloro-1,2-semiquinone) series journal April 1991
Chemistry of the ruthenium [Ru(RQ)(tap)2]z family: authentic catecholates, reduction potentials, and spectra (RQ = quinone/semiquinone/catecholate; tap = 2-(m-tolylazo)pyridine; z = 0, .+-., .+-.2) journal January 1992
Intramolecular, Photoinduced Electron Transfer in Ruthenium(II) Bipyridine-Quinone Complexes journal November 1994
Induced electron transfer in ammineruthenium catechol and quinone complexes journal February 1984
Catechol-quinone redox series involving bis(bipyridine)ruthenium(II) and tetrakis(pyridine)ruthenium(II) journal February 1986
Charge delocalization in ruthenium-quinone complexes. Structural characterization of bis(bipyridine)(3,5-di-tert-butylsemiquinonato)ruthenium(II) perchlorate and trans-bis(4-tert-butylpyridine)bis(3,5-di-tert-butylquinone)ruthenium journal June 1987
Electron Donor−Acceptor Dyads and Triads Based on Tris(bipyridine)ruthenium(II) and Benzoquinone:  Synthesis, Characterization, and Photoinduced Electron Transfer Reactions journal August 2003
Photoinduced Electron Transfer in Linear Triarylamine–Photosensitizer–Anthraquinone Triads with Ruthenium(II), Osmium(II), and Iridium(III) journal May 2012
Ruthenium Complexes of Quinone Related Ligands:  A Study of the Electrochemical Properties of 2-Aminothiophenolatobis(2,2‘-Bipyridine)Ruthenium(II) journal January 1999
Coordinated Photoinduced Electron and Proton Transfer in a Molecular Triad journal February 1995
Bis(dioxolene)(bipyridine)ruthenium redox series journal November 1988
Synthesis, characterization, and charge distribution of bis(4-tert-butylpyridine)bis(3,5-di-tert-butylquinone)ruthenium journal November 1986
The Reduction Potentials of Various Naphthoquinones journal March 1935
Catalytic Ketyl-Olefin Cyclizations Enabled by Proton-Coupled Electron Transfer journal June 2013
Catalytic Olefin Hydroamination with Aminium Radical Cations: A Photoredox Method for Direct C–N Bond Formation journal August 2014
High-Throughput Screening and Automated Data-Driven Analysis of the Triplet Photophysical Properties of Structurally Diverse, Heteroleptic Iridium(III) Complexes journal January 2021
PCET-Based Ligand Limits Charge Recombination with an Ir(III) Photoredox Catalyst journal August 2021
Catalytic Alkene Carboaminations Enabled by Oxidative Proton-Coupled Electron Transfer journal July 2015
Electron Transfer Rate Maxima at Large Donor–Acceptor Distances journal January 2016
Elucidation of a Redox-Mediated Reaction Cycle for Nickel-Catalyzed Cross Coupling journal November 2018
Hydrogen-Bond Strengthening upon Photoinduced Electron Transfer in Ruthenium–Anthraquinone Dyads Interacting with Hexafluoroisopropanol or Water journal March 2012
Correlating Experimental Photophysical Properties of Iridium(III) Complexes to Spin–Orbit Coupled TDDFT Predictions journal November 2013
A Practical Preparation of Highly Versatile N -Acylpyrroles from 2,4,4-Trimethoxybutan-1-amine journal March 2012
A bioinspired redox relay that mimics radical interactions of the Tyr–His pairs of photosystem II journal February 2014
Preparation of chiral-at-metal catalysts and their use in asymmetric photoredox chemistry journal March 2018
Synthesis and photoinduced electron transfer in platinum( ii ) bis(N-(4-ethynylphenyl)carbazole)bipyridine fullerene complexes journal January 2014
Optical transient absorption experiments reveal the failure of formal kinetics in diffusion assisted electron transfer reactions journal January 2018
Hydrogen bond assisted photoinduced intramolecular electron transfer and proton coupled electron transfer in an ultrafast time domain using a ruthenium-anthraquinone dyad journal January 2019
Quantitative insights into charge-separated states from one- and two-pulse laser experiments relevant for artificial photosynthesis journal January 2019
Reduction–oxidation properties of organotransition-metal complexes. Part 19. Carbonylruthenium catecholate and semiquinone complexes journal January 1984
Photoinduced electron transfer in covalent ruthenium–anthraquinone dyads: relative importance of driving-force, solvent polarity, and donor–bridge energy gap journal January 2012
The role of proton coupled electron transfer in water oxidation journal January 2012
Catecholato complexes of ruthenium, iridium, rhenium, molybdenum, and tungsten journal January 1986
A long-range-corrected time-dependent density functional theory journal May 2004
Systematic optimization of long-range corrected hybrid density functionals journal February 2008
Bimolecular photo-induced electron transfer enlightened by diffusion journal July 2020
Mimicking the electron transfer chain in photosystem II with a molecular triad thermodynamically capable of water oxidation journal May 2012