1
|
Grimmeisen M, Jessen-Trefzer C. Increasing the Selectivity of Light-Active Antimicrobial Agents - Or How To Get a Photosensitizer to the Desired Target. Chembiochem 2023; 24:e202300177. [PMID: 37132365 DOI: 10.1002/cbic.202300177] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2023] [Revised: 04/27/2023] [Accepted: 05/02/2023] [Indexed: 05/04/2023]
Abstract
Photosensitizers combine the inherent reactivity of reactive oxygen species with the sophisticated reaction control of light. Through selective targeting, these light-active molecules have the potential to overcome certain limitations in drug discovery. Ongoing advances in the synthesis and evaluation of photosensitizer conjugates with biomolecules such as antibodies, peptides, or small-molecule drugs are leading to increasingly powerful agents for the eradication of a growing number of microbial species. This review article, therefore, summarizes challenges and opportunities in the development of selective photosensitizers and their conjugates described in recent literature. This provides adequate insight for newcomers and those interested in this field.
Collapse
Affiliation(s)
- Michael Grimmeisen
- University of Freiburg, Faculty of Chemistry and Pharmacy, Institute of Organic Chemistry, Albertstraße 21, 79104, Freiburg im Breisgau, Germany
| | - Claudia Jessen-Trefzer
- University of Freiburg, Faculty of Chemistry and Pharmacy, Institute of Organic Chemistry, Albertstraße 21, 79104, Freiburg im Breisgau, Germany
| |
Collapse
|
2
|
Shimamura T, Yoshimura N, Otsuka H, Yoshida M, Kobayashi A. Efficient water reduction by ruthenium-picolinate dye-sensitized photocatalyst under red light illumination. J Photochem Photobiol A Chem 2022. [DOI: 10.1016/j.jphotochem.2022.114412] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
|
3
|
Sousa SF, Ertem MZ, Faustino LA, Machado AEH, Concepcion JJ, Maia PIS, Patrocinio AOT. Mechanistic investigation of the aerobic oxidation of 2-pyridylacetate coordinated to a Ru(II) polypyridyl complex. Dalton Trans 2021; 50:15248-15259. [PMID: 34632989 DOI: 10.1039/d1dt02461b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new ruthenium polypyridyl complex, [Ru(bpy)2(acpy)]+ (acpy = 2-pyridylacetate, bpy = 2,2'-bipyridine), was synthesized and fully characterized. Distinct from the previously reported analog, [Ru(bpy)2(pic)]+ (pic = 2-pyridylcarboxylate), the new complex is unstable under aerobic conditions and undergoes oxidation to yield the corresponding α-keto-2-pyridyl-acetate (acpyoxi) coordinated to the RuII center. The reaction is one of the few examples of C-H activation at mild conditions using O2 as the primary oxidant and can provide mechanistic insights with important implications for catalysis. Theoretical and experimental investigations of this aerobic oxidative transformation indicate that it takes place in two steps, first producing the α-hydroxo-2-pyridyl-acetate analog and then the final product. The observed rate constant for the first oxidation was in the order of 10-2 h-1. The reaction is hindered in the presence of coordinating solvents indicating the role of the metal center in the process. Theoretical calculations at the M06-L level of theory were performed for multiple reaction pathways in order to gain insights into the most probable mechanism. Our results indicate that O2 binding to [Ru(bpy)2(acpy)]+ is favored by the relative instability of the six-ring chelate formed by the acpy ligand and the resulting RuIII-OO˙- superoxo is stabilized by the carboxylate group in the coordination sphere. C-H activation by this species involves high activation free energies (ΔG‡ = 41.1 kcal mol-1), thus the formation of a diruthenium μ-peroxo intermediate, [(RuIII(bpy)2(O-acpy))2O2]2+via interaction of a second [Ru(bpy)2(acpy)]+ was examined as an alternative pathway. The dimer yields two RuIVO centers with a low ΔG‡ of 2.3 kcal mol-1. The resulting RuIVO species can activate C-H bonds in acpy (ΔG‡ = 23.1 kcal mol-1) to produce the coordinated α-hydroxo-2-pyridylacetate. Further oxidation of this intermediate leads to the α-keto-2-pyridyl-acetate product. The findings provide new insights into the mechanism of C-H activation catalyzed by transition-metal complexes using O2 as the sole oxygen source.
Collapse
Affiliation(s)
- Sinval F Sousa
- Laboratory of Photochemistry and Materials Science, Institute of Chemistry, Universidade Federal de Uberlandia, 38400-902, Uberlandia, Brazil.
| | - Mehmed Z Ertem
- Chemistry Division, Energy & Photon Sciences Directorate, Brookhaven National Laboratory, Upton, USA.
| | - Leandro A Faustino
- Laboratory of Photochemistry and Materials Science, Institute of Chemistry, Universidade Federal de Uberlandia, 38400-902, Uberlandia, Brazil.
| | - Antonio Eduardo H Machado
- Laboratory of Photochemistry and Materials Science, Institute of Chemistry, Universidade Federal de Uberlandia, 38400-902, Uberlandia, Brazil.
| | - Javier J Concepcion
- Chemistry Division, Energy & Photon Sciences Directorate, Brookhaven National Laboratory, Upton, USA.
| | - Pedro I S Maia
- Núcleo de Desenvolvimento de Compostos Bioativos (NDCBio), Universidade Federal do Triângulo Mineiro, Av. Dr. Randolfo Borges 1400, 38025-440 Uberaba, MG, Brazil
| | - Antonio Otavio T Patrocinio
- Laboratory of Photochemistry and Materials Science, Institute of Chemistry, Universidade Federal de Uberlandia, 38400-902, Uberlandia, Brazil.
| |
Collapse
|
4
|
Toyama M, Yamamoto Y, Yoshimoto T, Katagiri K. Crystal structures and solution behavior of cis-di(aqua)bis(2,2ʹ-bipyridine)cobalt(III) and related complexes. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2021.130938] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
5
|
Das B, Rahaman A, Shatskiy A, Verho O, Kärkäs MD, Åkermark B. The Impact of Ligand Carboxylates on Electrocatalyzed Water Oxidation. Acc Chem Res 2021; 54:3326-3337. [PMID: 34488345 PMCID: PMC8427742 DOI: 10.1021/acs.accounts.1c00298] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Fossil fuel shortage and severe climate changes due to global warming have prompted extensive research on carbon-neutral and renewable energy resources. Hydrogen gas (H2), a clean and high energy density fuel, has emerged as a potential solution for both fulfilling energy demands and diminishing the emission of greenhouse gases. Currently, water oxidation (WO) constitutes the bottleneck in the overall process of producing H2 from water. As a result, the design of efficient catalysts for WO has become an intensively pursued area of research in recent years. Among all the molecular catalysts reported to date, ruthenium-based catalysts have attracted particular attention due to their robust nature and higher activity compared to catalysts based on other transition metals.Over the past two decades, we and others have studied a wide range of ruthenium complexes displaying impressive catalytic performance for WO in terms of turnover number (TON) and turnover frequency (TOF). However, to produce practically applicable electrochemical, photochemical, or photo-electrochemical WO reactors, further improvement of the catalysts' structure to decrease the overpotential and increase the WO rate is of utmost importance. WO reaction, that is, the production of molecular oxygen and protons from water, requires the formation of an O-O bond through the orchestration of multiple proton and electron transfers. Promotion of these processes using redox noninnocent ligand frameworks that can accept and transfer electrons has therefore attracted substantial attention. The strategic modifications of the ligand structure in ruthenium complexes to enable proton-coupled electron transfer (PCET) and atom proton transfer (APT; in the context of WO, it is the oxygen atom (metal oxo) transfer to the oxygen atom of a water molecule in concert with proton transfer to another water molecule) to facilitate the O-O bond formation have played a central role in these efforts.In particular, promising results have been obtained with ligand frameworks containing carboxylic acid groups that either are directly bonded to the metal center or reside in the close vicinity. The improvement of redox and chemical properties of the catalysts by introduction of carboxylate groups in the ligands has proven to be quite general as demonstrated for a range of mono- and dinuclear ruthenium complexes featuring ligand scaffolds based on pyridine, imidazole, and pyridazine cores. In the first coordination sphere, the carboxylate groups are firmly coordinated to the metal center as negatively charged ligands, improving the stability of the complexes and preventing metal leaching during catalysis. Another important phenomenon is the reduction of the potentials required for the formation of higher valent intermediates, especially metal-oxo species, which take active part in the key O-O bond formation step. Furthermore, the free carboxylic acid/carboxylate units in the proximity to the active center have shown exciting proton donor/acceptor properties (through PCET or APT, chemically noninnocent) that can dramatically improve the rate as well as the overpotential of the WO reaction.
Collapse
Affiliation(s)
- Biswanath Das
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, Svante Arrhenius väg 16C, SE-10691 Stockholm, Sweden
| | - Ahibur Rahaman
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, Svante Arrhenius väg 16C, SE-10691 Stockholm, Sweden
| | - Andrey Shatskiy
- Division of Organic Chemistry, Department of Chemistry, KTH Royal Institute of Technology, SE-10044 Stockholm, Sweden
| | - Oscar Verho
- Department of Medicinal Chemistry, Drug Design and Discovery, Biomedicinskt Centrum BMC, Uppsala University, Husargatan 3, SE-75123 Uppsala, Sweden
| | - Markus D. Kärkäs
- Division of Organic Chemistry, Department of Chemistry, KTH Royal Institute of Technology, SE-10044 Stockholm, Sweden
| | - Björn Åkermark
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, Svante Arrhenius väg 16C, SE-10691 Stockholm, Sweden
| |
Collapse
|
6
|
Spectroscopic and electrochemical recognition of H2PO4− based on a ruthenium complex with 2-picolinamide. J Organomet Chem 2021. [DOI: 10.1016/j.jorganchem.2020.121612] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
7
|
Pierce S, Jennings MP, Juliano SA, Angeles-Boza AM. Peptide–Ruthenium Conjugate as an Efficient Photosensitizer for the Inactivation of Multidrug-Resistant Bacteria. Inorg Chem 2020; 59:14866-14870. [DOI: 10.1021/acs.inorgchem.0c02491] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Scott Pierce
- Department of Chemistry, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06269, United States
| | - Murphy P. Jennings
- Institute of Materials Science, University of Connecticut, 97 North Eagleville Road, Storrs, Connecticut 06269, United States
| | - Samuel A. Juliano
- Department of Chemistry, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06269, United States
| | - Alfredo M. Angeles-Boza
- Department of Chemistry, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06269, United States
- Institute of Materials Science, University of Connecticut, 97 North Eagleville Road, Storrs, Connecticut 06269, United States
| |
Collapse
|
8
|
Impert O, Kozakiewicz A, Wrzeszcz G, Katafias A, Bieńko A, van Eldik R, Ozarowski A. Characterization of a Mixed-Valence Ru(II)/Ru(III) Ion-Pair Complex. Unexpected High-Frequency Electron Paramagnetic Resonance Evidence for Ru(III)-Ru(III) Dimer Coupling. Inorg Chem 2020; 59:8609-8619. [PMID: 32441928 DOI: 10.1021/acs.inorgchem.0c01068] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
In this contribution, we report the synthesis and full characterization of the first mixed-valence Ru(II)/Ru(III) ion-pair complex, [RuII(bipy)2(pic)]+[cis-RuIIICl2(pic)2]-, in the solid state and in aqueous solution, where bipy = 2,2'-bipyridine and pic- = picolinate. In addition, unexpected high-frequency electron paramagnetic resonance evidence for interactions between two neighboring Ru(III) ions, resulting in a triplet state, S = 1, was found.
Collapse
Affiliation(s)
- Olga Impert
- Faculty of Chemistry, Nicolaus Copernicus University in Toruń, Gagarina 7, 87-100 Toruń, Poland
| | - Anna Kozakiewicz
- Faculty of Chemistry, Nicolaus Copernicus University in Toruń, Gagarina 7, 87-100 Toruń, Poland
| | - Grzegorz Wrzeszcz
- Faculty of Chemistry, Nicolaus Copernicus University in Toruń, Gagarina 7, 87-100 Toruń, Poland
| | - Anna Katafias
- Faculty of Chemistry, Nicolaus Copernicus University in Toruń, Gagarina 7, 87-100 Toruń, Poland
| | - Alina Bieńko
- Faculty of Chemistry, University of Wroclaw, 14 F. Joliot-Curie, 50-383 Wroclaw, Poland
| | - Rudi van Eldik
- Faculty of Chemistry, Nicolaus Copernicus University in Toruń, Gagarina 7, 87-100 Toruń, Poland.,Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Kraków, Poland.,Department of Chemistry and Pharmacy, University of Erlangen-Nuremberg, Egerlandstrasse 1, 91058 Erlangen, Germany
| | - Andrew Ozarowski
- National High Magnetic Field Laboratory, 1800 East Paul Dirac Drive, Tallahassee, Florida 32310 United States
| |
Collapse
|
9
|
Ghosh D, Kajiwara T, Kitagawa S, Tanaka K. Ligand‐Assisted Electrochemical CO
2
Reduction by Ru‐Polypyridyl Complexes. Eur J Inorg Chem 2020. [DOI: 10.1002/ejic.202000259] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Debashis Ghosh
- Department of Applied Chemistry Karunya Institute of Technology and Sciences (Deemed to be University) ‐641114 Coimbatore Tamil Nadu India
| | - Takashi Kajiwara
- Institute for Integrated Cell‐Material Sciences (KUIAS/iCeMS) Kyoto University Yoshida, Sakyo‐ku 606‐8501 Kyoto Japan
| | - Susumu Kitagawa
- Institute for Integrated Cell‐Material Sciences (KUIAS/iCeMS) Kyoto University Yoshida, Sakyo‐ku 606‐8501 Kyoto Japan
| | - Koji Tanaka
- Institute for Integrated Cell‐Material Sciences (KUIAS/iCeMS) Kyoto University Yoshida, Sakyo‐ku 606‐8501 Kyoto Japan
| |
Collapse
|
10
|
Misawa‐Suzuki T, Tomioka N, Osawa Y, Nagao H. Halogeno Ligand‐Substitution Reactions of Ruthenium Complexes Bearing Ethylbis(2‐pyridylmethyl)amine to Synthesize New Complexes. Eur J Inorg Chem 2019. [DOI: 10.1002/ejic.201900795] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Tomoyo Misawa‐Suzuki
- Department of Materials and Life Sciences Sophia University 7–1 Kioi‐cho Chiyoda‐ku 102–8554 Tokyo Japan
| | - Nozomi Tomioka
- Department of Materials and Life Sciences Sophia University 7–1 Kioi‐cho Chiyoda‐ku 102–8554 Tokyo Japan
| | - Yutaro Osawa
- Department of Materials and Life Sciences Sophia University 7–1 Kioi‐cho Chiyoda‐ku 102–8554 Tokyo Japan
| | - Hirotaka Nagao
- Department of Materials and Life Sciences Sophia University 7–1 Kioi‐cho Chiyoda‐ku 102–8554 Tokyo Japan
| |
Collapse
|
11
|
Tamaki Y, Tokuda K, Yamazaki Y, Saito D, Ueda Y, Ishitani O. Ruthenium Picolinate Complex as a Redox Photosensitizer With Wide-Band Absorption. Front Chem 2019; 7:327. [PMID: 31139619 PMCID: PMC6527782 DOI: 10.3389/fchem.2019.00327] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2019] [Accepted: 04/24/2019] [Indexed: 01/25/2023] Open
Abstract
Ruthenium(II) picolinate complex, [Ru(dmb)2(pic)]+ (Ru(pic); dmb = 4,4′-dimethyl-2,2′-bipyridine; Hpic = picolinic acid) was newly synthesized as a potential redox photosensitizer with a wider wavelength range of visible-light absorption compared with [Ru(N∧N)3]2+ (N∧N = diimine ligand), which is the most widely used redox photosensitizer. Based on our investigation of its photophysical and electrochemical properties, Ru(pic) was found to display certain advantageous characteristics of wide-band absorption of visible light (λabs < 670 nm) and stronger reduction ability in a one-electron reduced state (E1/2red = −1.86 V vs. Ag/AgNO3), which should function favorably in photon-absorption and electron transfer to the catalyst, respectively. Performing photocatalysis using Ru(pic) as a redox photosensitizer combined with a Re(I) catalyst reduced CO2 to CO under red-light irradiation (λex > 600 nm). TONCO reached 235 and ΦCO was 8.0%. Under these conditions, [Ru(dmb)3]2+ (Ru(dmb)) is not capable of working as a redox photosensitizer because it does not absorb light at λ > 560 nm. Even in irradiation conditions where both Ru(pic) and Ru(dmb) absorb light (λex > 500 nm), using Ru(pic) demonstrated faster CO formation (TOFCO = 6.7 min−1) and larger TONCO (2347) than Ru(dmb) (TOFCO = 3.6 min−1; TONCO = 2100). These results indicate that Ru(pic) is a superior redox photosensitizer over a wider wavelength range of visible-light absorption.
Collapse
Affiliation(s)
- Yusuke Tamaki
- Department of Chemistry, Tokyo Institute of Technology, Tokyo, Japan
| | - Kazuma Tokuda
- Department of Chemistry, Tokyo Institute of Technology, Tokyo, Japan
| | - Yasuomi Yamazaki
- Department of Chemistry, Tokyo Institute of Technology, Tokyo, Japan
| | - Daiki Saito
- Department of Chemistry, Tokyo Institute of Technology, Tokyo, Japan
| | - Yutaro Ueda
- Department of Chemistry, Tokyo Institute of Technology, Tokyo, Japan
| | - Osamu Ishitani
- Department of Chemistry, Tokyo Institute of Technology, Tokyo, Japan
| |
Collapse
|
12
|
Shatskiy A, Kärkäs MD, Åkermark B. The Art of Splitting Water: Storing Energy in a Readily Available and Convenient Form. Eur J Inorg Chem 2019. [DOI: 10.1002/ejic.201801548] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Andrey Shatskiy
- Department of Organic Chemistry Arrhenius Laboratory Stockholm University 106 91 Stockholm Sweden
| | - Markus D. Kärkäs
- Department of Chemistry Organic Chemistry KTH Royal Institute of Technology 100 44 Stockholm Sweden
| | - Björn Åkermark
- Department of Organic Chemistry Arrhenius Laboratory Stockholm University 106 91 Stockholm Sweden
| |
Collapse
|
13
|
Cyclobutane-based peptides/terpyridine conjugates: Their use in metal catalysis and as functional organogelators. Tetrahedron 2018. [DOI: 10.1016/j.tet.2018.10.064] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
14
|
Kagalwala HN, Tong L, Zong R, Kohler L, Ahlquist MSG, Fan T, Gagnon KJ, Thummel RP. Evidence for Oxidative Decay of a Ru-Bound Ligand during Catalyzed Water Oxidation. ACS Catal 2017. [DOI: 10.1021/acscatal.6b03278] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Husain N. Kagalwala
- Department
of Chemistry, University of Houston, 112 Fleming Building, Houston, Texas 77204-5003, United States
| | - Lianpeng Tong
- Department
of Chemistry, University of Houston, 112 Fleming Building, Houston, Texas 77204-5003, United States
| | - Ruifa Zong
- Department
of Chemistry, University of Houston, 112 Fleming Building, Houston, Texas 77204-5003, United States
| | - Lars Kohler
- Department
of Chemistry, University of Houston, 112 Fleming Building, Houston, Texas 77204-5003, United States
| | - Mårten S. G. Ahlquist
- Division of Theoretical Chemistry & Biology, School of Biotechnology, KTH Royal Institute of Technology, 10691 Stockholm, Sweden
| | - Ting Fan
- Division of Theoretical Chemistry & Biology, School of Biotechnology, KTH Royal Institute of Technology, 10691 Stockholm, Sweden
| | - Kevin J. Gagnon
- Advanced
Light Source, Lawrence Berkeley National Laboratory, 1 Cyclotron
Road, Berkeley, California 94720, United States
| | - Randolph P. Thummel
- Department
of Chemistry, University of Houston, 112 Fleming Building, Houston, Texas 77204-5003, United States
| |
Collapse
|
15
|
Oyama D, Kido M, Abe R, Takase T. Stability Dependence on Redox–active Site Structure in Free Catechol‐ or Hydroquinone–substituted Polypyridylruthenium(II) Complexes. ChemistrySelect 2017. [DOI: 10.1002/slct.201700153] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Dai Oyama
- Department of Industrial Systems EngineeringCluster of Science and EngineeringFukushima University, 1 Kanayagawa Fukushima 960-1296 Japan
| | - Masato Kido
- Department of Industrial Systems EngineeringCluster of Science and EngineeringFukushima University, 1 Kanayagawa Fukushima 960-1296 Japan
| | - Ryosuke Abe
- Department of Industrial Systems EngineeringCluster of Science and EngineeringFukushima University, 1 Kanayagawa Fukushima 960-1296 Japan
| | - Tsugiko Takase
- Institute of Environmental RadioactivityFukushima University, 1 Kanayagawa Fukushima 960-1296 Japan
| |
Collapse
|
16
|
TOYAMA M, NAKAYASU T, NAGAO N. Crystal Structure of (2-Picolinato)bis(2,2′-bipyridine)ruthenium(II) Chloride. X-RAY STRUCTURE ANALYSIS ONLINE 2017. [DOI: 10.2116/xraystruct.33.11] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Mari TOYAMA
- Department of Chemistry of Functional Molecules, Faculty of Science and Engineering, Konan University
| | - Toshifumi NAKAYASU
- Department of Chemistry of Functional Molecules, Faculty of Science and Engineering, Konan University
| | - Noriharu NAGAO
- Department of Applied Chemistry, School of Science and Technology, Meiji University
| |
Collapse
|
17
|
Hirahara M, Yagi M. Photoisomerization of ruthenium(ii) aquo complexes: mechanistic insights and application development. Dalton Trans 2017; 46:3787-3799. [DOI: 10.1039/c7dt00079k] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The perspective article highlights a new strategic synthesis of dinuclear ruthenium(ii) complexes acting as active water oxidation catalysts and also reports the development of unique visible-light-responsive giant vesicles, both of which are achieved based on photoisomerization.
Collapse
Affiliation(s)
- Masanari Hirahara
- Department of Applied Chemistry
- National Defense Academy of Japan
- Kanagawa 239-8686
- Japan
| | - Masayuki Yagi
- Department of Materials Science and Technology
- Faculty of Engineering
- Niigata University
- Niigata 950-2181
- Japan
| |
Collapse
|
18
|
Kärkäs MD, Åkermark B. Catalytic Water Oxidation by Ruthenium Complexes Containing Negatively Charged Ligand Frameworks. CHEM REC 2016; 16:940-63. [DOI: 10.1002/tcr.201500254] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2015] [Indexed: 11/10/2022]
Affiliation(s)
- Markus D. Kärkäs
- Department of Organic Chemistry; Arrhenius Laboratory, Stockholm University; 106 91 Stockholm Sweden
| | - Björn Åkermark
- Department of Organic Chemistry; Arrhenius Laboratory, Stockholm University; 106 91 Stockholm Sweden
| |
Collapse
|
19
|
Kärkäs MD, Liao RZ, Laine TM, Åkermark T, Ghanem S, Siegbahn PEM, Åkermark B. Molecular ruthenium water oxidation catalysts carrying non-innocent ligands: mechanistic insight through structure–activity relationships and quantum chemical calculations. Catal Sci Technol 2016. [DOI: 10.1039/c5cy01704a] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Herein is highlighted how structure–activity relationships can be used to provide mechanistic insight into H2O oxidation catalysis.
Collapse
Affiliation(s)
- Markus D. Kärkäs
- Department of Organic Chemistry
- Arrhenius Laboratory
- Stockholm University
- SE-106 91 Stockholm
- Sweden
| | - Rong-Zhen Liao
- Key Laboratory for Large-Format Battery Materials and System
- Ministry of Education
- School of Chemistry and Chemical Engineering
- Huazhong University of Science and Technology
- Wuhan 430074
| | - Tanja M. Laine
- Department of Organic Chemistry
- Arrhenius Laboratory
- Stockholm University
- SE-106 91 Stockholm
- Sweden
| | - Torbjörn Åkermark
- Department of Organic Chemistry
- Arrhenius Laboratory
- Stockholm University
- SE-106 91 Stockholm
- Sweden
| | - Shams Ghanem
- Department of Organic Chemistry
- Arrhenius Laboratory
- Stockholm University
- SE-106 91 Stockholm
- Sweden
| | - Per E. M. Siegbahn
- Department of Organic Chemistry
- Arrhenius Laboratory
- Stockholm University
- SE-106 91 Stockholm
- Sweden
| | - Björn Åkermark
- Department of Organic Chemistry
- Arrhenius Laboratory
- Stockholm University
- SE-106 91 Stockholm
- Sweden
| |
Collapse
|
20
|
Kärkäs MD, Åkermark B. Water oxidation using earth-abundant transition metal catalysts: opportunities and challenges. Dalton Trans 2016; 45:14421-61. [DOI: 10.1039/c6dt00809g] [Citation(s) in RCA: 181] [Impact Index Per Article: 22.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Catalysts for the oxidation of water are a vital component of solar energy to fuel conversion technologies. This Perspective summarizes recent advances in the field of designing homogeneous water oxidation catalysts (WOCs) based on Mn, Fe, Co and Cu.
Collapse
Affiliation(s)
- Markus D. Kärkäs
- Department of Organic Chemistry
- Arrhenius Laboratory
- Stockholm University
- SE-106 91 Stockholm
- Sweden
| | - Björn Åkermark
- Department of Organic Chemistry
- Arrhenius Laboratory
- Stockholm University
- SE-106 91 Stockholm
- Sweden
| |
Collapse
|
21
|
Laine TM, Kärkäs MD, Liao RZ, Åkermark T, Lee BL, Karlsson EA, Siegbahn PEM, Åkermark B. Efficient photochemical water oxidation by a dinuclear molecular ruthenium complex. Chem Commun (Camb) 2015; 51:1862-5. [PMID: 25525645 DOI: 10.1039/c4cc08606f] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Herein is described the preparation of a dinuclear molecular Ru catalyst for H2O oxidation. The prepared catalyst mediates the photochemical oxidation of H2O with an efficiency comparable to state-of-the-art catalysts.
Collapse
Affiliation(s)
- Tanja M Laine
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden.
| | | | | | | | | | | | | | | |
Collapse
|
22
|
Rabten W, Kärkäs MD, Åkermark T, Chen H, Liao RZ, Tinnis F, Sun J, Siegbahn PEM, Andersson PG, Åkermark B. Catalytic water oxidation by a molecular ruthenium complex: unexpected generation of a single-site water oxidation catalyst. Inorg Chem 2015; 54:4611-20. [PMID: 25945608 DOI: 10.1021/ic502755c] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
The increasing energy demand calls for the development of sustainable energy conversion processes. Here, the splitting of H2O to O2 and H2, or related fuels, constitutes an excellent example of solar-to-fuel conversion schemes. The critical component in such schemes has proven to be the catalyst responsible for mediating the four-electron oxidation of H2O to O2. Herein, we report on the unexpected formation of a single-site Ru complex from a ligand envisioned to accommodate two metal centers. Surprising N-N bond cleavage of the designed dinuclear ligand during metal complexation resulted in a single-site Ru complex carrying a carboxylate-amide motif. This ligand lowered the redox potential of the Ru complex sufficiently to permit H2O oxidation to be carried out by the mild one-electron oxidant [Ru(bpy)3](3+) (bpy = 2,2'-bipyridine). The work thus highlights that strongly electron-donating ligands are important elements in the design of novel, efficient H2O oxidation catalysts.
Collapse
Affiliation(s)
| | | | | | - Hong Chen
- §Faculty of Material Science and Chemistry, China University of Geosciences, 430074, Wuhan, China
| | - Rong-Zhen Liao
- ∥Key Laboratory for Large-Format Battery Materials and System, Ministry of Education, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, 430074, Wuhan, China
| | | | - Junliang Sun
- ⊥College of Chemistry and Molecular Engineering, Peking University, 100871, Beijing, China
| | | | | | | |
Collapse
|
23
|
Arafa WAA, Kärkäs MD, Lee BL, Åkermark T, Liao RZ, Berends HM, Messinger J, Siegbahn PEM, Åkermark B. Dinuclear manganese complexes for water oxidation: evaluation of electronic effects and catalytic activity. Phys Chem Chem Phys 2015; 16:11950-64. [PMID: 24554036 DOI: 10.1039/c3cp54800g] [Citation(s) in RCA: 56] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
During recent years significant progress has been made towards the realization of a sustainable and carbon-neutral energy economy. One promising approach is photochemical splitting of H2O into O2 and solar fuels, such as H2. However, the bottleneck in such artificial photosynthetic schemes is the H2O oxidation half reaction where more efficient catalysts are required that lower the kinetic barrier for this process. In particular catalysts based on earth-abundant metals are highly attractive compared to catalysts comprised of noble metals. We have now synthesized a library of dinuclear Mn2(II,III) catalysts for H2O oxidation and studied how the incorporation of different substituents affected the electronics and catalytic efficiency. It was found that the incorporation of a distal carboxyl group into the ligand scaffold resulted in a catalyst with increased catalytic activity, most likely because of the fact that the distal group is able to promote proton-coupled electron transfer (PCET) from the high-valent Mn species, thus facilitating O-O bond formation.
Collapse
Affiliation(s)
- Wael A A Arafa
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden.
| | | | | | | | | | | | | | | | | |
Collapse
|
24
|
Ashford DL, Glasson CRK, Norris MR, Concepcion JJ, Keinan S, Brennaman MK, Templeton JL, Meyer TJ. Controlling ground and excited state properties through ligand changes in ruthenium polypyridyl complexes. Inorg Chem 2014; 53:5637-46. [PMID: 24849026 DOI: 10.1021/ic500408j] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
The capture and storage of solar energy requires chromophores that absorb light throughout the solar spectrum. We report here the synthesis, characterization, electrochemical, and photophysical properties of a series of Ru(II) polypyridyl complexes of the type [Ru(bpy)2(N-N)](2+) (bpy = 2,2'-bipyridine; N-N is a bidentate polypyridyl ligand). In this series, the nature of the N-N ligand was altered, either through increased conjugation or incorporation of noncoordinating heteroatoms, as a way to use ligand electronic properties to tune redox potentials, absorption spectra, emission spectra, and excited state energies and lifetimes. Electrochemical measurements show that lowering the π* orbitals on the N-N ligand results in more positive Ru(3+/2+) redox potentials and more positive first ligand-based reduction potentials. The metal-to-ligand charge transfer absorptions of all of the new complexes are mostly red-shifted compared to Ru(bpy)3(2+) (λmax = 449 nm) with the lowest energy MLCT absorption appearing at λmax = 564 nm. Emission energies decrease from λmax = 650 nm to 885 nm across the series. One-mode Franck-Condon analysis of room-temperature emission spectra are used to calculate key excited state properties, including excited state redox potentials. The impacts of ligand changes on visible light absorption, excited state reduction potentials, and Ru(3+/2+) potentials are assessed in the context of preparing low energy light absorbers for application in dye-sensitized photoelectrosynthesis cells.
Collapse
Affiliation(s)
- Dennis L Ashford
- Department of Chemistry, University of North Carolina at Chapel Hill , CB 3290, Chapel Hill, North Carolina 27599, United States
| | | | | | | | | | | | | | | |
Collapse
|
25
|
Kärkäs MD, Johnston EV, Verho O, Åkermark B. Artificial photosynthesis: from nanosecond electron transfer to catalytic water oxidation. Acc Chem Res 2014; 47:100-11. [PMID: 23957573 DOI: 10.1021/ar400076j] [Citation(s) in RCA: 141] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Human society faces a fundamental challenge as energy consumption is projected to increase due to population and economic growth as fossil fuel resources decrease. Therefore the transition to alternative and sustainable energy sources is of the utmost importance. The conversion of solar energy into chemical energy, by splitting H2O to generate molecular O2 and H2, could contribute to solving the global energy problem. Developing such a system will require the combination of several complicated processes, such as light-harvesting, charge separation, electron transfer, H2O oxidation, and reduction of the generated protons. The primary processes of charge separation and catalysis, which occur in the natural photosynthetic machinery, provide us with an excellent blueprint for the design of such systems. This Account describes our efforts to construct supramolecular assemblies capable of carrying out photoinduced electron transfer and to develop artificial water oxidation catalysts (WOCs). Early work in our group focused on linking a ruthenium chromophore to a manganese-based oxidation catalyst. When we incorporated a tyrosine unit into these supramolecular assemblies, we could observe fast intramolecular electron transfer from the manganese centers, via the tyrosine moiety, to the photooxidized ruthenium center, which clearly resembles the processes occurring in the natural system. Although we demonstrated multi-electron transfer in our artificial systems, the bottleneck proved to be the stability of the WOCs. Researchers have developed a number of WOCs, but the majority can only catalyze H2O oxidation in the presence of strong oxidants such as Ce(IV), which is difficult to generate photochemically. By contrast, illumination of ruthenium(II) photosensitizers in the presence of a sacrificial acceptor generates [Ru(bpy)3](3+)-type oxidants. Their oxidation potentials are significantly lower than that of Ce(IV), but our group recently showed that incorporating negatively charged groups into the ligand backbone could decrease the oxidation potential of the catalysts and, at the same time, decrease the potential for H2O oxidation. This permitted us to develop both ruthenium- and manganese-based WOCs that can operate under neutral conditions, driven by the mild oxidant [Ru(bpy)3](3+). Many hurdles to the development of viable systems for the production of solar fuels remain. However, the combination of important features from the natural photosynthetic machinery and novel artificial components adds insights into the complicated catalytic processes that are involved in splitting H2O.
Collapse
Affiliation(s)
- Markus D. Kärkäs
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Eric V. Johnston
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Oscar Verho
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Björn Åkermark
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
| |
Collapse
|
26
|
Byrne JP, Kitchen JA, Kotova O, Leigh V, Bell AP, Boland JJ, Albrecht M, Gunnlaugsson T. Synthesis, structural, photophysical and electrochemical studies of various d-metal complexes of btp [2,6-bis(1,2,3-triazol-4-yl)pyridine] ligands that give rise to the formation of metallo-supramolecular gels. Dalton Trans 2014; 43:196-209. [DOI: 10.1039/c3dt52309h] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
|
27
|
Marelius DC, Bhagan S, Charboneau DJ, Schroeder KM, Kamdar JM, McGettigan AR, Freeman BJ, Moore CE, Rheingold AL, Cooksy AL, Smith DK, Paul JJ, Papish ET, Grotjahn DB. How Do Proximal Hydroxy or Methoxy Groups on the Bidentate Ligand Affect [(2,2′;6′,2"-Terpyridine)Ru(N,N)X] Water-Oxidation Catalysts? Synthesis, Characterization, and Reactivity at Acidic and Near-Neutral pH. Eur J Inorg Chem 2013. [DOI: 10.1002/ejic.201300826] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
|
28
|
Hirahara M, Ertem MZ, Komi M, Yamazaki H, Cramer CJ, Yagi M. Mechanisms of Photoisomerization and Water-Oxidation Catalysis of Mononuclear Ruthenium(II) Monoaquo Complexes. Inorg Chem 2013; 52:6354-64. [DOI: 10.1021/ic400054k] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Masanari Hirahara
- Department of Materials Science
and Technology, Faculty of Engineering, and Center for Transdisciplinary
Research, Niigata University, 8050 Ikarashi-2, Niigata 950-2181, Japan
| | - Mehmed Z. Ertem
- Department of Chemistry, Chemical
Theory Center, and Supercomputing Institute, University of Minnesota,
207 Pleasant Street SE, Minneapolis, Minnesota 55455-0431, United
States
| | - Manabu Komi
- Department of Materials Science
and Technology, Faculty of Engineering, and Center for Transdisciplinary
Research, Niigata University, 8050 Ikarashi-2, Niigata 950-2181, Japan
| | - Hirosato Yamazaki
- Department of Materials Science
and Technology, Faculty of Engineering, and Center for Transdisciplinary
Research, Niigata University, 8050 Ikarashi-2, Niigata 950-2181, Japan
| | - Christopher J. Cramer
- Department of Chemistry, Chemical
Theory Center, and Supercomputing Institute, University of Minnesota,
207 Pleasant Street SE, Minneapolis, Minnesota 55455-0431, United
States
| | - Masayuki Yagi
- Department of Materials Science
and Technology, Faculty of Engineering, and Center for Transdisciplinary
Research, Niigata University, 8050 Ikarashi-2, Niigata 950-2181, Japan
- Precursory Research for Embryonic
Science and Technology (PRESTO), Japan Science and Technology Agency
(JST), 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan
| |
Collapse
|
29
|
Madureira J, Santos TM. Solution and solid-state spectroscopic characterization of chloro dimethylsulfoxide polythioether ruthenium(II) complexes, complemented with DFT calculations in the gas phase. J COORD CHEM 2013. [DOI: 10.1080/00958972.2013.770846] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- João Madureira
- a Departamento de Química e CICECO , Universidade de Aveiro , Aveiro , Portugal
- b Department of Chemistry , Virginia Commonwealth University , Richmond , VA , USA
| | - Teresa M. Santos
- a Departamento de Química e CICECO , Universidade de Aveiro , Aveiro , Portugal
| |
Collapse
|
30
|
Karlsson EA, Lee BL, Åkermark T, Johnston EV, Kärkäs MD, Sun J, Hansson Ö, Bäckvall JE, Åkermark B. Photosensitized Water Oxidation by Use of a Bioinspired Manganese Catalyst. Angew Chem Int Ed Engl 2011; 50:11715-8. [DOI: 10.1002/anie.201104355] [Citation(s) in RCA: 198] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2011] [Indexed: 11/11/2022]
|
31
|
Karlsson EA, Lee BL, Åkermark T, Johnston EV, Kärkäs MD, Sun J, Hansson Ö, Bäckvall JE, Åkermark B. Photosensitized Water Oxidation by Use of a Bioinspired Manganese Catalyst. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201104355] [Citation(s) in RCA: 84] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
|
32
|
Lee BL, Kärkäs MD, Johnston EV, Inge AK, Tran LH, Xu Y, Hansson Ö, Zou X, Åkermark B. Synthesis and Characterization of Oligonuclear Ru, Co and Cu Oxidation Catalysts. Eur J Inorg Chem 2010. [DOI: 10.1002/ejic.201000758] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
33
|
Robinson VL, Hunter CA, Ward MD. An improved synthesis, crystal structures, and metallochromism of salts of [Ru(tolyl-terpy)(CN)3]−. Inorganica Chim Acta 2010. [DOI: 10.1016/j.ica.2010.03.021] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
34
|
Synthesis and characterization of rigid +2 and +3 heteroleptic dinuclear ruthenium(II) complexes. Polyhedron 2010. [DOI: 10.1016/j.poly.2010.06.012] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
|
35
|
Affiliation(s)
- Beth Anne McClure
- Department of Chemistry and Biochemistry, Nanoscale and Quantum Phenomena Institute, Clippinger Laboratories, Ohio University Athens, OH 45701, USA, Fax: +1‐740‐593‐0148
| | - Jeffrey J. Rack
- Department of Chemistry and Biochemistry, Nanoscale and Quantum Phenomena Institute, Clippinger Laboratories, Ohio University Athens, OH 45701, USA, Fax: +1‐740‐593‐0148
| |
Collapse
|
36
|
Ostermeier M, Berlin MA, Meudtner R, Demeshko S, Meyer F, Limberg C, Hecht S. Complexes of Click-Derived Bistriazolylpyridines: Remarkable Electronic Influence of Remote Substituents on Thermodynamic Stability as well as Electronic and Magnetic Properties. Chemistry 2010; 16:10202-13. [DOI: 10.1002/chem.201000721] [Citation(s) in RCA: 92] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
37
|
Oyama D, Kido M, Orita A, Takase T. Synthesis, structure, redox property and ligand replacement reaction of ruthenium(II) complexes containing a terpyridyl ligand with a redox active moiety. Polyhedron 2010. [DOI: 10.1016/j.poly.2009.12.024] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
38
|
McClure B, Rack J. Two-Color Reversible Switching in a Photochromic Ruthenium Sulfoxide Complex. Angew Chem Int Ed Engl 2009; 48:8556-8. [DOI: 10.1002/anie.200903553] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
39
|
McClure B, Rack J. Two-Color Reversible Switching in a Photochromic Ruthenium Sulfoxide Complex. Angew Chem Int Ed Engl 2009. [DOI: 10.1002/ange.200903553] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
40
|
Tseng HW, Zong R, Muckerman JT, Thummel R. Mononuclear ruthenium(II) complexes that catalyze water oxidation. Inorg Chem 2009; 47:11763-73. [PMID: 19006384 DOI: 10.1021/ic8014817] [Citation(s) in RCA: 323] [Impact Index Per Article: 21.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Two series of mononuclear ruthenium(II) complexes involving polypyridine-type ligands have been prepared, and their ability to act as catalysts for water oxidation has been examined. One series is of the type [Ru(tpy)(NN)Cl](PF(6)) (tpy = 2,2'; 6,2''-terpyridine), where NN is one of 12 different bidentate ligands, and the other series includes various combinations of 4-picoline, 2,2'-bipyridine (bpy), and tpy as well as the tetradentate 2,9-dipyrid-2'-yl-1,10-phenanthroline (dpp). The electronic absorption and redox data for these compounds have been measured and reported. The long-wavelength metal-to-ligand charge-transfer absorption and the first oxidation and reduction potentials are found to be consistent with the structure of the complex. Of the 23 complexes, 14 catalyze water oxidation and all of these contain a tpy or dpp. Kinetic measurements indicate a first-order reaction and together with a catalyst recovery experiment argue against the involvement of RuO(2). A tentative mechanism is proposed that involves a seven-coordinate Ru(VI)=O species that is attacked by water to form the critical O-O bond. Density functional theory calculations, which support the proposed mechanism, are performed.
Collapse
Affiliation(s)
- Huan-Wei Tseng
- Department of Chemistry, University of Houston, 136 Fleming Building, Houston, Texas 77204-5003, USA
| | | | | | | |
Collapse
|
41
|
Das A, Sarkar B, Duboc C, Strobel S, Fiedler J, Záliš S, Lahiri G, Kaim W. Das ungeradzahlig elektronenkonfigurierte Komplexion [Ruk(NOm)(Qn)(terpy)]2+mit zwei idealtypischen “nicht-unschuldigen” Liganden. Angew Chem Int Ed Engl 2009. [DOI: 10.1002/ange.200900767] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
42
|
Das A, Sarkar B, Duboc C, Strobel S, Fiedler J, Záliš S, Lahiri G, Kaim W. An Odd-Electron Complex [Ruk(NOm)(Qn)(terpy)]2+with Two Prototypical Non-Innocent Ligands. Angew Chem Int Ed Engl 2009; 48:4242-5. [DOI: 10.1002/anie.200900767] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
43
|
Halpenny GM, Mascharak PK. Accelerated Photorelease of NO from {Ru-NO}6 Nitrosyls Containing Carboxamido-N and Carboxylato-O Donors: Syntheses, Structures, and Photochemistry. Inorg Chem 2009; 48:1490-7. [DOI: 10.1021/ic801748t] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Genevieve M. Halpenny
- Department of Chemistry and Biochemistry, University of California, Santa Cruz, California 95064
| | - Pradip K. Mascharak
- Department of Chemistry and Biochemistry, University of California, Santa Cruz, California 95064
| |
Collapse
|
44
|
Constable EC, Dunphy EL, Housecroft CE, Neuburger M, Schaffner S, Schaper F, Batten SR. Expanded ligands: bis(2,2′:6′,2″-terpyridine carboxylic acid)ruthenium(ii) complexes as metallosupramolecular analogues of dicarboxylic acids. Dalton Trans 2007:4323-32. [PMID: 17893822 DOI: 10.1039/b709557k] [Citation(s) in RCA: 94] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Ligands in which multiple metal-binding domains are linked by a metal-containing moiety rather than a conventional organic group are described as "expanded ligands". The use of 4,4'-difunctionalised {Ru(tpy)(2)} units provides a linear spacer between metal-binding domains and we have extended this motif to expanded ligands containing two carboxylic acid metal-binding domains. In this paper, we describe the synthesis and structural characterisation of ruthenium(ii) complexes of 2,2':6',2''-terpyridine-4'-carboxylic acid and 4'-carboxyphenyl-2,2':6',2''-terpyridine. The ability of the ruthenium(ii) centre to charge compensate deprotonation of the carboxylic acid leads to Zwitterionic complexes and three representative compounds have been structurally characterised.
Collapse
Affiliation(s)
- Edwin C Constable
- Department of Chemistry, University of Basel, Spitalstrasse 51, 4056 Basel, Switzerland.
| | | | | | | | | | | | | |
Collapse
|
45
|
Rachford AA, Rack JJ. Picosecond Isomerization in Photochromic Ruthenium−Dimethyl Sulfoxide Complexes. J Am Chem Soc 2006; 128:14318-24. [PMID: 17076504 DOI: 10.1021/ja0641305] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The complexes [Ru(tpy)(bpy)(dmso)](OSO(2)CF(3))(2) and trans-[Ru(tpy)(pic)(dmso)](PF(6)) (tpy is 2,2':6',2' '-terpyridine, bpy is 2,2'-bipyridine, pic is 2-pyridinecarboxylate, and dmso is dimethyl sulfoxide) were investigated by picosecond transient absorption spectroscopy in order to monitor excited-state intramolecular S-->O isomerization of the bound dmso ligand. For [Ru(tpy)(bpy)(dmso)](2+), global analysis of the spectra reveals changes that are fit by a biexponential decay with time constants of 2.4 +/- 0.2 and 36 +/- 0.2 ps. The first time constant is assigned to relaxation of the S-bonded (3)MLCT excited state. The second time constant represents both excited-state relaxation to ground state and excited-state isomerization to form O-[Ru(tpy)(bpy)(dmso)](2+). In conjunction with the S-->O isomerization quantum yield (Phi(S)(-->)(O) = 0.024), isomerization of [Ru(tpy)(bpy)(dmso)](2+) occurs with a time constant of 1.5 ns. For trans-[Ru(tpy)(pic)(dmso)](+), global analysis of the transient spectra reveals time constants of 3.6 +/- 0.2 and 118 +/- 2 ps associated with these two processes. In conjunction with the S-->O isomerization quantum yield (Phi(S)(-->)(O) = 0.25), isomerization of trans-[Ru(tpy)(pic)(dmso)](+) occurs with a time constant of 480 ps. In both cases, the thermally relaxed excited states are assigned as terpyridine-localized (3)MLCT states. Electronic state diagrams are compiled employing these data as well as electrochemical, absorption, and emission data to describe the reactivity of these complexes. The data illustrate that rapid bond-breaking and bond-making reactions can occur from (3)MLCT excited states formed from visible light irradiation.
Collapse
Affiliation(s)
- Aaron A Rachford
- Department of Chemistry and Biochemistry, Ohio University, Athens, Ohio 45701, USA
| | | |
Collapse
|
46
|
Tse MK, Jiao H, Anilkumar G, Bitterlich B, Gelalcha FG, Beller M. Synthetic, spectral and catalytic activity studies of ruthenium bipyridine and terpyridine complexes: Implications in the mechanism of the ruthenium(pyridine-2,6-bisoxazoline)(pyridine-2,6-dicarboxylate)-catalyzed asymmetric epoxidation of olefins utilizing H2O2. J Organomet Chem 2006. [DOI: 10.1016/j.jorganchem.2005.12.069] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
47
|
Yutaka T, Kurihara M, Nishihara H. Synthesis and Physical Properties of a π-Conjugated Ruthenium(II) Dinuclear Complex Involving an Azobenzene-Bridged Bis(terpyridine) Ligand. ACTA ACUST UNITED AC 2006. [DOI: 10.1080/10587250008023525] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Tomona Yutaka
- a Department of Chemistry , School of Science, The University of Tokyo , 7-3-1 Hongo, Bunkyo-ku , Tokyo , 113-0033 , Japan
| | - Masato Kurihara
- a Department of Chemistry , School of Science, The University of Tokyo , 7-3-1 Hongo, Bunkyo-ku , Tokyo , 113-0033 , Japan
| | - Hiroshi Nishihara
- a Department of Chemistry , School of Science, The University of Tokyo , 7-3-1 Hongo, Bunkyo-ku , Tokyo , 113-0033 , Japan
| |
Collapse
|
48
|
|
49
|
Warren S, McCormac T, Dempsey E. Investigation of novel mediators for a glucose biosensor based on metal picolinate complexes. Bioelectrochemistry 2005; 67:23-35. [PMID: 15967398 DOI: 10.1016/j.bioelechem.2004.07.005] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2004] [Revised: 06/02/2004] [Accepted: 07/05/2004] [Indexed: 10/25/2022]
Abstract
The metal complexes [Os(byp)(2)(pic)](+) and [Ru(byp)(2)(pic)](+) where byp is 2,2'-bipyridine and HPic is o-picolinic acid were synthesised and characterised using spectroscopic and electrochemical techniques. These complexes were then evaluated as mediators for a glucose oxidase (GOx)-based biosensor. Results demonstrate the electrocatalytic behaviour of both metal couples towards regeneration of the flavoprotein GOx (FADH(2)) group, when co-immobilised with glucose oxidase. Surface immobilisation was achieved by potential cycling in aqueous solutions of the metal complexes at a glucose oxidase (GOx)/Nafion modified electrode. This proved successful in terms of catalytic efficiency and stability of redox sites. Kinetic parameters associated with both enzymatic and mediator reactions were estimated and the stability/performance properties of the sensor were tested.
Collapse
Affiliation(s)
- Susan Warren
- Electrochemical Technology Research Centre, Dept. Applied Science, Institute of Technology Tallaght, Tallaght, Dublin 24, Ireland
| | | | | |
Collapse
|
50
|
Kn�dler A, Kaim W. Cis/trans-Isomerie von [RuCl2(S-dmso)(tpy)] Komplexen, tpy = Terpyridin-Ligand. Z Anorg Allg Chem 2005. [DOI: 10.1002/zaac.200400330] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
|