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Zenkov IS, Yakushev AA, Abel AS, Averin AD, Bessmertnykh-Lemeune AG, Beletskaya IP. Photocatalytic Activity of Ruthenium(II) Complex with 1,10-Phenanthroline-3,8-dicarboxylic Acid in Aerobic Oxidation Reactions. RUSSIAN JOURNAL OF ORGANIC CHEMISTRY 2021. [DOI: 10.1134/s1070428021090025] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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2
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Kaufmann M, Müller C, Cullen AA, Brandon MP, Dietzek B, Pryce MT. Photophysics of Ruthenium(II) Complexes with Thiazole π-Extended Dipyridophenazine Ligands. Inorg Chem 2020; 60:760-773. [PMID: 33356204 DOI: 10.1021/acs.inorgchem.0c02765] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Transition-metal-based donor-acceptor systems can produce long-lived excited charge-transfer states by visible-light irradiation. The novel ruthenium(II) polypyridyl type complexes Ru1 and Ru2 based on the dipyridophenazine ligand (L0) directly linked to 4-hydroxythiazoles of different donor strengths were synthesized and photophysically characterized. The excited-state dynamics were investigated by femtosecond-to-nanosecond transient absorption and nanosecond emission spectroscopy complemented by time-dependent density functional theory calculations. These results indicate that photoexcitation in the visible region leads to the population of both metal-to-ligand charge-transfer (1MLCT) and thiazole (tz)-induced intraligand charge-transfer (1ILCT) states. Thus, the excited-state dynamics is described by two excited-state branches, namely, the population of (i) a comparably short-lived phenazine-centered 3MLCT state (τ ≈ 150-400 ps) and (ii) a long-lived 3ILCT state (τ ≈ 40-300 ns) with excess charge density localized on the phenazine and tz moieties. Notably, the ruthenium(II) complexes feature long-lived dual emission with lifetimes in the ranges τEm,1 ≈ 40-300 ns and τEm,2 ≈ 100-200 ns, which are attributed to emission from the 3ILCT and 3MLCT manifolds, respectively.
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Affiliation(s)
- Martin Kaufmann
- School of Chemical Sciences, National Centre for Sensor Research, Dublin City University, Dublin 9, Ireland
| | - Carolin Müller
- Institute of Physical Chemistry and Abbe Center of Photonics, Friedrich Schiller University Jena, Helmholtzweg 4, Jena 07743, Germany.,Research Department Functional Interfaces, Leibniz Institute of Photonic Technology, Albert-Einstein-Straße 9, Jena 07745, Germany
| | - Aoibhin A Cullen
- School of Chemical Sciences, National Centre for Sensor Research, Dublin City University, Dublin 9, Ireland
| | - Michael P Brandon
- School of Chemical Sciences, National Centre for Sensor Research, Dublin City University, Dublin 9, Ireland
| | - Benjamin Dietzek
- Institute of Physical Chemistry and Abbe Center of Photonics, Friedrich Schiller University Jena, Helmholtzweg 4, Jena 07743, Germany.,Research Department Functional Interfaces, Leibniz Institute of Photonic Technology, Albert-Einstein-Straße 9, Jena 07745, Germany.,Center for Energy and Environmental Chemistry Jena, Friedrich Schiller University Jena, Lessingstraße 8, Jena 07743, Germany
| | - Mary T Pryce
- School of Chemical Sciences, National Centre for Sensor Research, Dublin City University, Dublin 9, Ireland
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Staniszewska M, Kupfer S, Guthmuller J. Theoretical Investigation of the Electron-Transfer Dynamics and Photodegradation Pathways in a Hydrogen-Evolving Ruthenium-Palladium Photocatalyst. Chemistry 2018; 24:11166-11176. [PMID: 29768683 DOI: 10.1002/chem.201801698] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2018] [Indexed: 11/10/2022]
Abstract
Time-dependent density functional theory calculations combined with the Marcus theory of electron transfer (ET) were applied on the molecular photocatalyst [(tbbpy)2 Ru(tpphz)PdCl2 ]2+ in order to elucidate the light-induced relaxation pathways populated upon excitation in the longer wavelength range of its absorption spectrum. The computational results show that after the initial excitation, metal (Ru) to ligand (tpphz) charge transfer (MLCT) triplet states are energetically accessible, but that an ET toward the catalytic center (PdCl2 ) from these states is a slow process, with estimated time constants above 1 ns. Instead, the calculations predict that low-lying Pd-centered states are efficiently populated-associated to an energy transfer toward the catalytic center. Thus, it is postulated that these states lead to the dissociation of a Cl- and are consequently responsible for the experimentally observed degradation of the catalytic center. Following dissociation, it is shown that the ET rates from the MLCT states to the charge separated states are significantly increased (i.e. 104 -106 times larger). This demonstrates that alteration of the catalytic center generates efficient charge separation.
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Affiliation(s)
- Magdalena Staniszewska
- Faculty of Applied Physics and Mathematics, Gdańsk University of Technology, Narutowicza 11/12, 80233, Gdańsk, Poland
| | - Stephan Kupfer
- Institute of Physical Chemistry and Abbe Center of Photonics, Friedrich Schiller University Jena, Helmholtzweg 4, 07743, Jena, Germany
| | - Julien Guthmuller
- Faculty of Applied Physics and Mathematics, Gdańsk University of Technology, Narutowicza 11/12, 80233, Gdańsk, Poland
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4
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Kohler L, Hayes D, Hong J, Carter TJ, Shelby ML, Fransted KA, Chen LX, Mulfort KL. Synthesis, structure, ultrafast kinetics, and light-induced dynamics of CuHETPHEN chromophores. Dalton Trans 2018; 45:9871-83. [PMID: 26924711 DOI: 10.1039/c6dt00324a] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Five heteroleptic Cu(i)bis(phenanthroline) chromophores with distinct variation in the steric bulk at the 2,9-phenanthroline position were synthesized using the HETPHEN method, and their ground and excited state properties are described. Analysis of the crystal structures reveals a significant distortion from tetrahedral geometry around the Cu(i) centre which is attributed to favourable aromatic interactions between the two phenanthroline ligands. Ultrafast and nanosecond transient optical spectroscopies reveal that the excited state lifetime can be tuned across two orders of magnitude up to 74 nanoseconds in acetonitrile by changing the 2,9-substituent from hydrogen to sec-butyl. X-ray transient absorption spectroscopy at the Cu K-edge confirmed Cu(i) oxidation to Cu(ii) and revealed a decrease of the Cu-N bond lengths in the excited state. The ground and excited state characterization presented here will guide the integration of CuHETPHEN chromophores into complex electron donor-acceptor architectures.
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Affiliation(s)
- Lars Kohler
- Division of Chemical Sciences and Engineering, Argonne National Laboratory, 9700 South Cass Ave, Argonne, IL 60439, USA.
| | - Dugan Hayes
- Division of Chemical Sciences and Engineering, Argonne National Laboratory, 9700 South Cass Ave, Argonne, IL 60439, USA.
| | - Jiyun Hong
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208, USA
| | - Tyler J Carter
- Division of Chemical Sciences and Engineering, Argonne National Laboratory, 9700 South Cass Ave, Argonne, IL 60439, USA.
| | - Megan L Shelby
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208, USA
| | - Kelly A Fransted
- Division of Chemical Sciences and Engineering, Argonne National Laboratory, 9700 South Cass Ave, Argonne, IL 60439, USA.
| | - Lin X Chen
- Division of Chemical Sciences and Engineering, Argonne National Laboratory, 9700 South Cass Ave, Argonne, IL 60439, USA. and Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208, USA
| | - Karen L Mulfort
- Division of Chemical Sciences and Engineering, Argonne National Laboratory, 9700 South Cass Ave, Argonne, IL 60439, USA.
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5
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Simayi R, Hope EG, Singh K, Cross WB, Solan GA. NNpyC- and ONpyC-Pincers as functional ligands for palladium(II) complexes and assemblies. J Organomet Chem 2017. [DOI: 10.1016/j.jorganchem.2017.09.041] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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6
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Huber FL, Nauroozi D, Mengele AK, Rau S. Synthesis and Characterization of a Ruthenium(II) Complex for the Development of Supramolecular Photocatalysts Containing Multidentate Coordination Spheres. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201700565] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Fabian L. Huber
- Institute of Inorganic Chemistry I; Ulm University; Albert-Einstein-Allee 11 89081 Ulm Germany
| | - Djawed Nauroozi
- Institute of Inorganic Chemistry I; Ulm University; Albert-Einstein-Allee 11 89081 Ulm Germany
| | - Alexander K. Mengele
- Institute of Inorganic Chemistry I; Ulm University; Albert-Einstein-Allee 11 89081 Ulm Germany
| | - Sven Rau
- Institute of Inorganic Chemistry I; Ulm University; Albert-Einstein-Allee 11 89081 Ulm Germany
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7
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Manbeck GF, Fujita E, Brewer KJ. Tetra- and Heptametallic Ru(II),Rh(III) Supramolecular Hydrogen Production Photocatalysts. J Am Chem Soc 2017; 139:7843-7854. [DOI: 10.1021/jacs.7b02142] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Gerald F. Manbeck
- Chemistry
Division, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Etsuko Fujita
- Chemistry
Division, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Karen J. Brewer
- Department
of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, United States
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8
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A metal-organic cage incorporating multiple light harvesting and catalytic centres for photochemical hydrogen production. Nat Commun 2016; 7:13169. [PMID: 27827376 PMCID: PMC5105156 DOI: 10.1038/ncomms13169] [Citation(s) in RCA: 102] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2016] [Accepted: 09/05/2016] [Indexed: 01/03/2023] Open
Abstract
Photocatalytic water splitting is a natural but challenging chemical way of harnessing renewable solar power to generate clean hydrogen energy. Here we report a potential hydrogen-evolving photochemical molecular device based on a self-assembled ruthenium–palladium heterometallic coordination cage, incorporating multiple photo- and catalytic metal centres. The photophysical properties are investigated by absorption/emission spectroscopy, electrochemical measurements and preliminary DFT calculations and the stepwise electron transfer processes from ruthenium-photocentres to catalytic palladium-centres is probed by ultrafast transient absorption spectroscopy. The photocatalytic hydrogen production assessments reveal an initial reaction rate of 380 μmol h−1 and a turnover number of 635 after 48 h. The efficient hydrogen production may derive from the directional electron transfers through multiple channels owing to proper organization of the photo- and catalytic multi-units within the octahedral cage, which may open a new door to design photochemical molecular devices with well-organized metallosupramolecules for homogenous photocatalytic applications. Photocatalytic water splitting is a promising route to hydrogen generation from renewable solar power. Here, the authors report a hydrogen-evolving photochemical molecular device based on a self-assembled coordination cage, which simultaneously incorporates multiple photosensitizing and catalytic metal centres.
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Juliá F, García-Legaz MD, Bautista D, González-Herrero P. Influence of Ancillary Ligands and Isomerism on the Luminescence of Bis-cyclometalated Platinum(IV) Complexes. Inorg Chem 2016; 55:7647-60. [DOI: 10.1021/acs.inorgchem.6b01100] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Fabio Juliá
- Departamento de Química Inorgánica, Facultad de Química and ‡SAI, Universidad de Murcia, Apdo. 4021, 30071 Murcia, Spain
| | - María-Dulce García-Legaz
- Departamento de Química Inorgánica, Facultad de Química and ‡SAI, Universidad de Murcia, Apdo. 4021, 30071 Murcia, Spain
| | - Delia Bautista
- Departamento de Química Inorgánica, Facultad de Química and ‡SAI, Universidad de Murcia, Apdo. 4021, 30071 Murcia, Spain
| | - Pablo González-Herrero
- Departamento de Química Inorgánica, Facultad de Química and ‡SAI, Universidad de Murcia, Apdo. 4021, 30071 Murcia, Spain
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10
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Mengele AK, Kaufhold S, Streb C, Rau S. Generation of a stable supramolecular hydrogen evolving photocatalyst by alteration of the catalytic center. Dalton Trans 2016; 45:6612-8. [DOI: 10.1039/c6dt00130k] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The change of the catalytic center from MX2 to RhCp*Cl leads to a stability boost in [(tbbpy)2Ru(tpphz)] based supramolecular photocatalysts.
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Affiliation(s)
- Alexander K. Mengele
- University of Ulm
- Institute of Inorganic Chemistry Materials and Catalysis
- 89081 Ulm
- Germany
| | - Simon Kaufhold
- University of Ulm
- Institute of Inorganic Chemistry Materials and Catalysis
- 89081 Ulm
- Germany
| | - Carsten Streb
- University of Ulm
- Institute of Inorganic Chemistry Materials and Catalysis
- 89081 Ulm
- Germany
| | - Sven Rau
- University of Ulm
- Institute of Inorganic Chemistry Materials and Catalysis
- 89081 Ulm
- Germany
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11
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Pfeffer MG, Kowacs T, Wächtler M, Guthmuller J, Dietzek B, Vos JG, Rau S. Gezielte Optimierung von molekularen Photokatalysatoren zur Wasserstoffproduktion mit sichtbarem Licht. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201409442] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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12
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Pfeffer MG, Kowacs T, Wächtler M, Guthmuller J, Dietzek B, Vos JG, Rau S. Optimization of Hydrogen-Evolving Photochemical Molecular Devices. Angew Chem Int Ed Engl 2015; 54:6627-31. [DOI: 10.1002/anie.201409442] [Citation(s) in RCA: 78] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2014] [Revised: 12/24/2014] [Indexed: 11/11/2022]
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13
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Pfeffer MG, Schäfer B, Smolentsev G, Uhlig J, Nazarenko E, Guthmuller J, Kuhnt C, Wächtler M, Dietzek B, Sundström V, Rau S. Palladium versus Platinum: The Metal in the Catalytic Center of a Molecular Photocatalyst Determines the Mechanism of the Hydrogen Production with Visible Light. Angew Chem Int Ed Engl 2015; 54:5044-8. [DOI: 10.1002/anie.201409438] [Citation(s) in RCA: 97] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2014] [Indexed: 11/08/2022]
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14
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Pfeffer MG, Schäfer B, Smolentsev G, Uhlig J, Nazarenko E, Guthmuller J, Kuhnt C, Wächtler M, Dietzek B, Sundström V, Rau S. Palladium versus Platin - das Metall im Katalysezentrum eines molekularen Photokatalysators bestimmt den Mechanismus der Wasserstoffproduktion mit sichtbarem Licht. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201409438] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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15
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Ritter K, Pehlken C, Sorsche D, Rau S. Optimized synthesis of a tert-butyl-phenyl-substituted tetrapyridophenazine ligand and its Ru(ii) complexes and determination of dimerization behaviour of the complexes through supramolecular “Fingerhakel”. Dalton Trans 2015; 44:8889-905. [DOI: 10.1039/c5dt00214a] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A high dimerization constant of a ruthenium complex is observed with the aid of 1H-NMR spectroscopy. The solid state molecular structure indicates that multiple π-interactions are the reason for strong dimerization.
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Affiliation(s)
- K. Ritter
- Department of Inorganic Chemistry I
- University of Ulm
- 89081 Ulm
- Germany
| | - C. Pehlken
- Department of Inorganic Chemistry I
- University of Ulm
- 89081 Ulm
- Germany
| | - D. Sorsche
- Department of Inorganic Chemistry I
- University of Ulm
- 89081 Ulm
- Germany
| | - S. Rau
- Department of Inorganic Chemistry I
- University of Ulm
- 89081 Ulm
- Germany
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16
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Braumüller M, Schulz M, Sorsche D, Pfeffer M, Schaub M, Popp J, Park BW, Hagfeldt A, Dietzek B, Rau S. Synthesis and characterization of an immobilizable photochemical molecular device for H2-generation. Dalton Trans 2015; 44:5577-86. [DOI: 10.1039/c4dt03730h] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The immobilizable photocatalyst (4) was synthesized and successfully applied in visible-light-driven hydrogen-generation experiments, supporting its applicability in photoelectrosynthesis cells.
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Affiliation(s)
| | - Martin Schulz
- Institute of Photonic Technology (IPHT) Jena e. V
- D-07745 Jena
- Germany
- Institute for Physical Chemistry and Abbe Centre of Photonics
- Friedrich-Schiller University Jena
| | | | | | - Markus Schaub
- Universität Ulm
- Anorganische Chemie I
- D-89081 Ulm
- Germany
| | - Jürgen Popp
- Institute for Physical Chemistry and Abbe Centre of Photonics
- Friedrich-Schiller University Jena
- D-07743 Jena
- Germany
| | - Byung-Wook Park
- Department of Chemistry-Ångström
- Uppsala University
- SE-751 20 Uppsala
- Sweden
| | - Anders Hagfeldt
- Laboratory for Photomolecular Science (LSPM)
- Swiss Federal Institute of Technology at Lausanne (EPFL)
- CH-1015 Lausanne
- Switzerland
| | - Benjamin Dietzek
- Institute of Photonic Technology (IPHT) Jena e. V
- D-07745 Jena
- Germany
- Institute for Physical Chemistry and Abbe Centre of Photonics
- Friedrich-Schiller University Jena
| | - Sven Rau
- Universität Ulm
- Anorganische Chemie I
- D-89081 Ulm
- Germany
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