1
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Gámez S, Magerat A, de la Torre E, Gaigneaux EM. Functionalization of carbon black for Ru complexation towards the oxidative cleavage of oleic acid. MOLECULAR CATALYSIS 2023. [DOI: 10.1016/j.mcat.2023.113097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/28/2023]
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2
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Genzink MJ, Kidd JB, Swords WB, Yoon TP. Chiral Photocatalyst Structures in Asymmetric Photochemical Synthesis. Chem Rev 2022; 122:1654-1716. [PMID: 34606251 PMCID: PMC8792375 DOI: 10.1021/acs.chemrev.1c00467] [Citation(s) in RCA: 138] [Impact Index Per Article: 69.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Asymmetric catalysis is a major theme of research in contemporary synthetic organic chemistry. The discovery of general strategies for highly enantioselective photochemical reactions, however, has been a relatively recent development, and the variety of photoreactions that can be conducted in a stereocontrolled manner is consequently somewhat limited. Asymmetric photocatalysis is complicated by the short lifetimes and high reactivities characteristic of photogenerated reactive intermediates; the design of catalyst architectures that can provide effective enantiodifferentiating environments for these intermediates while minimizing the participation of uncontrolled racemic background processes has proven to be a key challenge for progress in this field. This review provides a summary of the chiral catalyst structures that have been studied for solution-phase asymmetric photochemistry, including chiral organic sensitizers, inorganic chromophores, and soluble macromolecules. While some of these photocatalysts are derived from privileged catalyst structures that are effective for both ground-state and photochemical transformations, others are structural designs unique to photocatalysis and offer insight into the logic required for highly effective stereocontrolled photocatalysis.
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Affiliation(s)
- Matthew J Genzink
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - Jesse B Kidd
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - Wesley B Swords
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - Tehshik P Yoon
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, Wisconsin 53706, United States
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3
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Asahara M, Kurimoto H, Nakamizu M, Hattori S, Shinozaki K. H/D solvent isotope effects on the photoracemization reaction of enantiomeric the tris(2,2′-bipyridine)ruthenium(ii) complex and its analogues. Phys Chem Chem Phys 2020; 22:6361-6369. [DOI: 10.1039/c9cp06758b] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This work assessed solvent isotope effects on the photoracemization rate and emission lifetime for [Ru(bpy)3]2+ (bpy = 2,2′-bipyridine) in water.
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Affiliation(s)
- Masahiro Asahara
- Department of Materials Science
- Graduate School of Nanobioscience
- Yokohama City University
- Kanazawa-ku
- Japan
| | - Haruhiko Kurimoto
- Department of Materials Science
- Graduate School of Nanobioscience
- Yokohama City University
- Kanazawa-ku
- Japan
| | - Masato Nakamizu
- Department of Materials Science
- Graduate School of Nanobioscience
- Yokohama City University
- Kanazawa-ku
- Japan
| | - Shingo Hattori
- Department of Materials Science
- Graduate School of Nanobioscience
- Yokohama City University
- Kanazawa-ku
- Japan
| | - Kazuteru Shinozaki
- Department of Materials Science
- Graduate School of Nanobioscience
- Yokohama City University
- Kanazawa-ku
- Japan
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4
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Feng L, Wang Y. A Key Factor Dominating the Competition between Photolysis and Photoracemization of [Ru(bipy) 3] 2+ and [Ru(phen) 3] 2+ Complexes. Inorg Chem 2018; 57:8994-9001. [PMID: 30024733 DOI: 10.1021/acs.inorgchem.8b00975] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Photolysis and photoracemization are two important photochemical phenomena of the prototype complexes [Ru(bipy)3]2+ and [Ru(phen)3]2+ (bipy = 2,2'-bipyridine, phen = 1,10-phenanthroline), but little is known about their relations. To solve this issue, the photoinduced chiral inversion Δ⇌Λ of the complexes was analyzed theoretically. The results indicated that the photoracemization reaction proceeds on the lowest triplet potential energy surface in three steps 3CTΔ↔3MCΔ, 3MCΔ↔3MCΛ, and 3MCΛ↔3CTΛ (CT = charge transfer state; MC = metal-centered state). Where the first and third steps are fast processes of picoseconds, the second is the rate-determining step (RDS) of microseconds. Such a slow step for the racemization leads to the excited molecule lingering around the bottom of 3MC state after the first step and, therefore, greatly enhances the possibility of deexcitation and photolysis mostly at the triplet-singlet crossing point. In other words, the photoracemization and photolysis of the complexes have a competition relation, not a slave relation as assumed by the photoracemization model suggested in literature. They are dominated by the RDS. This conclusion is also consistent with the Δ(δ S)⇌Λ(δ S) chiral inversion of the [Ru(bipy)2(L-ser)]+ series complexes, which is reversible with no detectable photolysis, as its second step is a fast one. Note that, although the photoracemization of the prototype complexes is very slow, it passes through the three steps reversibly and ends with a photon emitting, which could be detected with the time-resolved circularly polarized luminescence and related techniques. These findings are helpful to understand and control the photochemical behavior of the complexes in practice.
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Affiliation(s)
- Lixia Feng
- Key Laboratory of Chemical Biology and Molecular Engineering of the Education Ministry, Institute of Molecular Science , Shanxi University , Taiyuan , Shanxi 030006 , P. R. China.,Department of Chemistry , Taiyuan Normal University , Jinzhong , Shanxi 030619 , P. R. China
| | - Yuekui Wang
- Key Laboratory of Chemical Biology and Molecular Engineering of the Education Ministry, Institute of Molecular Science , Shanxi University , Taiyuan , Shanxi 030006 , P. R. China
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5
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Loftus LM, Li A, Fillman KL, Martin PD, Kodanko JJ, Turro C. Unusual Role of Excited State Mixing in the Enhancement of Photoinduced Ligand Exchange in Ru(II) Complexes. J Am Chem Soc 2017; 139:18295-18306. [PMID: 29226680 PMCID: PMC5901749 DOI: 10.1021/jacs.7b09937] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Four Ru(II) complexes were prepared bearing two new tetradentate ligands, cyTPA and 1-isocyTPQA, which feature a piperidine ring that provides a structurally rigid backbone and facilitates the installation of other donors as the fourth chelating arm, while avoiding the formation of stereoisomers. The photophysical properties and photochemistry of [Ru(cyTPA)(CH3CN)2]2+ (1), [Ru(1-isocyTPQA)(CH3CN)2]2+ (2), [Ru(cyTPA)(py)2]2+ (3), and [Ru(1-isocyTPQA)(py)2]2+ (4) were compared. The quantum yield for the CH3CN/H2O ligand exchange of 2 was measured to be Φ400 = 0.033(3), 5-fold greater than that of 1, Φ400 = 0.0066(3). The quantum yields for the py/H2O ligand exchange of 3 and 4 were lower, 0.0012(1) and 0.0013(1), respectively. DFT and related calculations show the presence of a highly mixed 3MLCT/3ππ* excited state as the lowest triplet state in 2, whereas the lowest energy triplet states in 1, 3, and 4 were calculated to be 3LF in nature. The mixed 3MLCT/3ππ* excited state places significant spin density on the quinoline moiety of the 1-isocyTPQA ligand positioned trans to the photolabile CH3CN ligand in 2, suggesting the presence of a trans-type influence in the excited state that enhances ligand exchange. Ultrafast spectroscopy was used to probe the excited states of 1-4, which confirmed that the mixed 3MLCT/3ππ* excited state in 2 promotes ligand dissociation, representing a new manner to effect photoinduced ligand exchange. The findings from this work can be used to design improved complexes for applications that require efficient ligand dissociation, as well as for those that require minimal deactivation of the 3MLCT state through low-lying metal-centered states.
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Affiliation(s)
- Lauren M. Loftus
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio 43210, United States
| | - Ao Li
- Department of Chemistry, Wayne State University, Detroit, Michigan 48202, United States
| | - Kathlyn L. Fillman
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio 43210, United States
| | - Philip D. Martin
- Department of Chemistry, Wayne State University, Detroit, Michigan 48202, United States
| | - Jeremy J. Kodanko
- Department of Chemistry, Wayne State University, Detroit, Michigan 48202, United States
| | - Claudia Turro
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio 43210, United States
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6
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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.
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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
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7
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Khnayzer RS, Olaiya BS, El Roz KA, Castellano FN. Homogeneous Photocatalytic H
2
Production Using a Ru
II
Bathophenanthroline Metal‐to‐Ligand Charge‐Transfer Photosensitizer. Chempluschem 2016; 81:1090-1097. [DOI: 10.1002/cplu.201600227] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2016] [Indexed: 11/10/2022]
Affiliation(s)
- Rony S. Khnayzer
- Department of Natural Sciences Lebanese American University P.O. Box 13-5053, Chouran Beirut 1102-2801 Lebanon
| | - Babatunde S. Olaiya
- Department of Chemistry Bowling Green State University Bowling Green OH 43403 USA
| | - Karim A. El Roz
- Department of Chemistry North Carolina State University 2620 Yarbrough Drive Raleigh NC 27695 USA
| | - Felix N. Castellano
- Department of Chemistry North Carolina State University 2620 Yarbrough Drive Raleigh NC 27695 USA
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8
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Aihara Y, Sato K, Shinozaki K. Optical Resolution, Determination of Absolute Configuration, and Photoracemization of cis-RuL2(CN)2 (L = 2,2′-Bipyridine and Its Analogues). Inorg Chem 2016; 55:8387-95. [DOI: 10.1021/acs.inorgchem.6b00772] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yusuke Aihara
- Department of Material Science,
Graduate School of Nanobioscience, Yokohama City University, 22-2
Seto, Kanazawa-ku, Yokohama 236-0027, Japan
| | - Kyohei Sato
- Department of Material Science,
Graduate School of Nanobioscience, Yokohama City University, 22-2
Seto, Kanazawa-ku, Yokohama 236-0027, Japan
| | - Kazuteru Shinozaki
- Department of Material Science,
Graduate School of Nanobioscience, Yokohama City University, 22-2
Seto, Kanazawa-ku, Yokohama 236-0027, Japan
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9
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Takahashi K, Zhang X, Hirahara M, Sato T, Saito K, Yui T, Yagi M. Influence of chloro substituent on photoisomerization, redox reactions and water oxidation catalysis of mononuclear ruthenium complexes. J Photochem Photobiol A Chem 2015. [DOI: 10.1016/j.jphotochem.2015.05.029] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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10
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Characterization of the excited states of distal- and proximal-[Ru(tpy)(pynp)OH2]2+ in aqueous solution using time-resolved infrared spectroscopy. J Photochem Photobiol A Chem 2015. [DOI: 10.1016/j.jphotochem.2015.06.018] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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11
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Hirahara M, Nagai S, Takahashi K, Saito K, Yui T, Yagi M. New Series of Dinuclear Ruthenium(II) Complexes Synthesized Using Photoisomerization for Efficient Water Oxidation Catalysis. Inorg Chem 2015. [PMID: 26200106 DOI: 10.1021/acs.inorgchem.5b01264] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A new series of proximal,proximal-[Ru2(tpy)2(L)XY](n+) (p,p-Ru2XY, tpy = 2,2':6',2″-terpyridine, L = 5-phenyl-2,8-di(2-pyridyl)-1,9,10-anthyridine, X and Y = other coordination sites) were synthesized using photoisomerization of a mononuclear complex. The p,p-Ru2XY complexes undergo unusual reversible bridge-exchange reactions to generate p,p-Ru2(μ-Cl), p,p-Ru2(μ-OH), and p,p-Ru2(OH)(OH2) with μ-Cl, μ-OH, as well as hydroxo and aquo ligands at X and Y sites of p,p-Ru2XY, respectively. The geometric and electronic structures of these complexes were characterized based on UV-vis and (1)H NMR spectra, X-ray crystallography, and density functional theory (DFT) calculations. (1)H NMR data showed C2 symmetry of p,p-Ru2(OH)(OH2) with the distorted L chelate and nonequivalence of two tpy ligands, in contrast to the C2v symmetry of p,p-Ru2(μ-Cl) and p,p-Ru2(μ-OH). However, irrespective of the lower symmetry, p,p-Ru2(OH)(OH2) is predominantly formed in neutral and weakly basic conditions due to the specially stabilized core structure by multiple hydrogen-bond interactions among aquo, hydroxo, and backbone L ligands. The electrochemical data suggested that p,p-Ru2(OH)(OH2) (Ru(II)-OH:Ru(II)-OH2) is oxidized to the Ru(III)-OH:Ru(III)-OH state at 0.64 V vs saturated calomel electrode (SCE) and further to Ru(IV)═O:Ru(IV)-OH at 0.79 V by successive 1-proton-coupled 2-electron processes at pH 7.0. The cyclic voltammogram data exhibited that the p,p-Ru2(OH)(OH2) complex works more efficiently for electrocatalytic water oxidation, compared with a similar mononuclear complex distal-[Ru(tpy)(L)OH2](2+) (d-RuOH2) and p,p-Ru2(μ-Cl) and p,p-Ru2(μ-OH), showing that the p,p-Ru2 core structure with aquo and hydroxo ligands is important for efficient electrocatalytic water oxidation. Bulk electrolysis of the p,p-Ru2(OH)(OH2) solution corroborated the electrocatalytic cycle involving the Ru(III)-OH:Ru(III)-OH state species as a resting state. The mechanistic insight into O-O bond formation for O2 production was provided by the isotope effect on electrocatalytic water oxidation by p,p-Ru2(OH)(OH2) and d-RuOH2 in H2O and D2O media.
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Affiliation(s)
- Masanari Hirahara
- †Department of Materials Science and Technology, Faculty of Engineering, Niigata University, 8050 Ikarashi-2, Niigata 950-2181, Japan
| | - Sho Nagai
- †Department of Materials Science and Technology, Faculty of Engineering, Niigata University, 8050 Ikarashi-2, Niigata 950-2181, Japan
| | - Kosuke Takahashi
- †Department of Materials Science and Technology, Faculty of Engineering, Niigata University, 8050 Ikarashi-2, Niigata 950-2181, Japan
| | - Kenji Saito
- †Department of Materials Science and Technology, Faculty of Engineering, Niigata University, 8050 Ikarashi-2, Niigata 950-2181, Japan
| | - Tatsuto Yui
- †Department of Materials Science and Technology, Faculty of Engineering, Niigata University, 8050 Ikarashi-2, Niigata 950-2181, Japan
| | - Masayuki Yagi
- †Department of Materials Science and Technology, Faculty of Engineering, 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
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12
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Hirahara M, Hakamata T, League AB, Ertem MZ, Takahashi K, Nagai S, Inaba K, Yamazaki H, Saito K, Yui T, Cramer CJ, Yagi M. Mechanisms and Factors Controlling Photoisomerization Equilibria, Ligand Exchange, and Water Oxidation Catalysis Capabilities of Mononuclear Ruthenium(II) Complexes. Eur J Inorg Chem 2015. [DOI: 10.1002/ejic.201500642] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Masanari Hirahara
- Department of Materials Science and Technology, Faculty of Engineering, Niigata University, 8050 Ikarashi‐2, Niigata 950‐2181, Japan, https://www.niigata‐u.ac.jp/index_e.html
| | - Tomoya Hakamata
- Department of Materials Science and Technology, Faculty of Engineering, Niigata University, 8050 Ikarashi‐2, Niigata 950‐2181, Japan, https://www.niigata‐u.ac.jp/index_e.html
| | - Aaron B. League
- Department of Chemistry, Chemical Theory Center, and Supercomputing Institute, University of Minnesota, 207 Pleasant St. SE, Minneapolis, MN 55455‐0431, USA
| | - Mehmed Z. Ertem
- Department of Chemistry, Chemical Theory Center, and Supercomputing Institute, University of Minnesota, 207 Pleasant St. SE, Minneapolis, MN 55455‐0431, USA
| | - Kosuke Takahashi
- Department of Materials Science and Technology, Faculty of Engineering, Niigata University, 8050 Ikarashi‐2, Niigata 950‐2181, Japan, https://www.niigata‐u.ac.jp/index_e.html
| | - Sho Nagai
- Department of Materials Science and Technology, Faculty of Engineering, Niigata University, 8050 Ikarashi‐2, Niigata 950‐2181, Japan, https://www.niigata‐u.ac.jp/index_e.html
| | - Keisuke Inaba
- Department of Materials Science and Technology, Faculty of Engineering, Niigata University, 8050 Ikarashi‐2, Niigata 950‐2181, Japan, https://www.niigata‐u.ac.jp/index_e.html
| | - Hirosato Yamazaki
- Department of Materials Science and Technology, Faculty of Engineering, Niigata University, 8050 Ikarashi‐2, Niigata 950‐2181, Japan, https://www.niigata‐u.ac.jp/index_e.html
| | - Kenji Saito
- Department of Materials Science and Technology, Faculty of Engineering, Niigata University, 8050 Ikarashi‐2, Niigata 950‐2181, Japan, https://www.niigata‐u.ac.jp/index_e.html
| | - Tatsuto Yui
- Department of Materials Science and Technology, Faculty of Engineering, Niigata University, 8050 Ikarashi‐2, Niigata 950‐2181, Japan, https://www.niigata‐u.ac.jp/index_e.html
| | - Christopher J. Cramer
- Department of Chemistry, Chemical Theory Center, and Supercomputing Institute, University of Minnesota, 207 Pleasant St. SE, Minneapolis, MN 55455‐0431, USA
| | - Masayuki Yagi
- Department of Materials Science and Technology, Faculty of Engineering, Niigata University, 8050 Ikarashi‐2, Niigata 950‐2181, Japan, https://www.niigata‐u.ac.jp/index_e.html
- Precursory Research for Embryonic Science and Technology (PRESTO), Japan Science and Technology Agency (JST), 4‐1‐8 Honcho, Kawaguchi, Saitama 332‐0012, Japan
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13
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Kärkäs MD, Verho O, Johnston EV, Åkermark B. Artificial Photosynthesis: Molecular Systems for Catalytic Water Oxidation. Chem Rev 2014; 114:11863-2001. [DOI: 10.1021/cr400572f] [Citation(s) in RCA: 1024] [Impact Index Per Article: 102.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Markus D. Kärkäs
- 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
| | - Eric V. Johnston
- 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
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14
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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
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15
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Fu C, Wenzel M, Treutlein E, Harms K, Meggers E. Proline as chiral auxiliary for the economical asymmetric synthesis of ruthenium(II) polypyridyl complexes. Inorg Chem 2012; 51:10004-11. [PMID: 22946499 DOI: 10.1021/ic3015157] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A straightforward method for the synthesis of virtually enantiomerically pure ruthenium(II) polypyridyl complexes [Ru(pp)(pp')(pp")](PF(6))(2), pp = bidentate polypyridyl has been developed. The synthesis draws from the readily available racemic starting material cis-[Ru(pp)(pp')Cl(2)] and the natural amino acids l- or d-proline and relies on a dynamic asymmetric transformation under thermodynamic control.
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Affiliation(s)
- Chen Fu
- Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Strasse, 35043 Marburg, Germany
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16
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Vadavi R, Conrad ED, Arbuckle DI, Cameron TS, Essoun E, Aquino MAS. Chiral Induction via the Disassembly of Diruthenium(II,III) Tetraacetate by Chiral Diphosphines. Inorg Chem 2011; 50:11862-4. [DOI: 10.1021/ic202013m] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ramesh Vadavi
- Department of Chemistry, St. Francis Xavier University, P.O.
Box 5000, Antigonish, Nova Scotia B2G 2W5, Canada
| | - Eamonn D. Conrad
- Department of Chemistry, St. Francis Xavier University, P.O.
Box 5000, Antigonish, Nova Scotia B2G 2W5, Canada
| | - D. Ian Arbuckle
- Department of Chemistry, St. Francis Xavier University, P.O.
Box 5000, Antigonish, Nova Scotia B2G 2W5, Canada
| | - T. Stanley Cameron
- Department of Chemistry, Dalhousie University, Halifax, Nova
Scotia B3H 4J3, Canada
| | - Ernest Essoun
- Department of Chemistry, St. Francis Xavier University, P.O.
Box 5000, Antigonish, Nova Scotia B2G 2W5, Canada
| | - Manuel A. S. Aquino
- Department of Chemistry, St. Francis Xavier University, P.O.
Box 5000, Antigonish, Nova Scotia B2G 2W5, Canada
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17
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Yamazaki H, Hakamata T, Komi M, Yagi M. Stoichiometric photoisomerization of mononuclear ruthenium(II) monoaquo complexes controlling redox properties and water oxidation catalysis. J Am Chem Soc 2011; 133:8846-9. [PMID: 21595472 DOI: 10.1021/ja2024228] [Citation(s) in RCA: 85] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Although various reactions involved in photoexcited states of polypyridyl ruthenium(II) complexes have been extensively studied, photoisomerization of the complexes is very rare. We report the first illustration of stoichiometric photoisomerization of trans-[Ru(tpy)(pynp)OH(2)](2+) (1a) [tpy = 2,2':6',2''-terpyridine; pynp = 2-(2-pyridyl)-1,8-naphthyridine] to cis-[Ru(tpy)(pynp)OH(2)](2+) (1a') and the isolation of 1a and 1a' for X-ray crystallographic analysis. Polypyridyl ruthenium(II) aquo complexes are attracting much attention related to proton-coupled electron transfer and water oxidation catalysis. We demonstrate that the photoisomerization significantly controls the redox reactions and water oxidation catalyses involving the ruthenium(II) aquo complexes 1a and 1a'.
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Affiliation(s)
- 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
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18
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Onishi M, Tashiro Y, Arikawa Y, Nagaoka J, Umakoshi K, Sunada Y, Nozaki K. Chiral Bis(oxazoline) Ruthenium Complexes with Bipyridyl-Type N-Heteroaromatics: Comparative Stereochemical and Photochemical Characterization of their Λ- and Δ-Diastereomeric Geminate Isomers. Chem Asian J 2011; 6:1405-15. [DOI: 10.1002/asia.201000738] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2010] [Indexed: 11/11/2022]
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19
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Tsuchiya K, Ito E, Yagai S, Kitamura A, Karatsu T. Chirality in the Photochemical mer→fac Geometrical Isomerization of Tris(1-phenylpyrazolato,N,C2′)iridium(III). Eur J Inorg Chem 2009. [DOI: 10.1002/ejic.200801254] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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20
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Manjón F, Villén L, García-Fresnadillo D, Orellana G. On the factors influencing the performance of solar reactors for water disinfection with photosensitized singlet oxygen. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2008; 42:301-307. [PMID: 18350912 DOI: 10.1021/es071762y] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Two solar reactors based on compound parabolic collectors (CPCs) were optimized for water disinfection by photosensitized singlet oxygen (1O2) production in the heterogeneous phase. Sensitizing materials containing Ru(II) complexes immobilized on porous silicone were produced, photochemically characterized, and successfully tested for the inactivation of up to 10(4) CFU mL(-1) of waterborne Escherichia coli (gram-negative) or Enterococcus faecalis (gram-positive) bacteria. The main factors determining the performance of the solar reactors are the type of photosensitizing material, the sensitizer loading, the CPC collector geometry (fin- vs coaxial-type), the fluid rheology, and the balance between concurrent photothermal--photolytic and 1O2 effects on the microorganisms' inactivation. In this way, at the 40 degrees N latitude of Spain, water can be disinfected on a sunny day (0.6-0.8 MJ m(-2) L(-1) accumulated solar radiation dose in the 360-700 nm range, typically 5-6 h of sunlight) with a fin-type reactor containing 0.6 m2 of photosensitizing material saturated with tris(4,7-diphenyl-1,10-phenanthroline)ruthenium(II) (ca. 2.0 g m(-2)). The optimum rheological conditions require laminar-to-transitional water flow in both prototypes. The fin-type system showed better inactivation efficiency than the coaxial reactor due to a more important photolytic contribution. The durability of the sensitizing materials was tested and the operational lifetime of the photocatalyst is at least three months without any reduction in the bacteria inactivation efficiency. Solar water disinfection with 1O2-generating films is demonstrated to be an effective technique for use in isolated regions of developing countries with high yearly average sunshine.
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Affiliation(s)
- Francisco Manjón
- Laboratory of Applied Photochemistry, Department of Organic Chemistry, Faculty of Chemistry, Universidad Complutense de Madrid, E-28040 Madrid, Spain
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Sun P, Krishnan A, Yadav A, Singh S, MacDonnell FM, Armstrong DW. Enantiomeric Separations of Ruthenium(II) Polypyridyl Complexes Using High-Performance Liquid Chromatography (HPLC) with Cyclodextrin Chiral Stationary Phases (CSPs). Inorg Chem 2007; 46:10312-20. [DOI: 10.1021/ic701023x] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ping Sun
- Department of Chemistry and Biochemistry, The University of Texas at Arlington, Texas 76019
| | - Arthi Krishnan
- Department of Chemistry and Biochemistry, The University of Texas at Arlington, Texas 76019
| | - Abhishek Yadav
- Department of Chemistry and Biochemistry, The University of Texas at Arlington, Texas 76019
| | - Shreeyukta Singh
- Department of Chemistry and Biochemistry, The University of Texas at Arlington, Texas 76019
| | | | - Daniel W. Armstrong
- Department of Chemistry and Biochemistry, The University of Texas at Arlington, Texas 76019
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22
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Influence of ligand structure and molecular geometry on the properties of d6 polypyridinic transition metal complexes. Chem Phys 2006. [DOI: 10.1016/j.chemphys.2006.01.040] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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23
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Synthesis of ruthenium(II) complexes of aromatic chelating heterocycles: Towards the design of luminescent compounds. STRUCTURE AND BONDING 2005. [DOI: 10.1007/3-540-17881-3_1] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register]
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24
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Villegas JM, Stoyanov SR, Huang W, Lockyear LL, Reibenspies JH, Rillema DP. Synthesis, Characterization, and Photochemical and Computational Investigations of Ru(II) Heterocyclic Complexes Containing 2,6-dimethylphenylisocyanide (CNx) Ligand. Inorg Chem 2004; 43:6383-96. [PMID: 15446888 DOI: 10.1021/ic049099r] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The isocyanide ligand forms complexes with ruthenium(II) bis-bipyridine of the type [Ru(bpy)(2)(CNx)Cl](CF(3)SO(3)) (1), [Ru(bpy)(2)(CNx)(py)](PF(6))(2) (2), and [Ru(bpy)(2)(CNx)(2)](PF(6))(2) (3) (bpy = 2,2'-bipyridine, py = pyridine, and CNx = 2,6-dimethylphenylisocyanide). The redox potentials shift positively as the number of CNx ligands increases. The metal-to-ligand charge-transfer (MLCT) bands of the complexes are located at higher energy than 450 nm and blue shift in proportion to the number of CNx ligands. The complexes are not emissive at room temperature but exhibit intense structured emission bands at 77 K with emission lifetimes as high as 25 micros. Geometry optimization of the complexes in the singlet ground and lowest-lying triplet states performed using density functional theory (DFT) provides information about the orbital heritage and correlates with X-ray and electrochemical results. The lowest-lying triplet-state energies correlate well with the 77 K emission energies for the three complexes. Singlet excited states calculated in ethanol using time-dependent density functional theory (TDDFT) and the conductor-like polarizable continuum model (CPCM) provide information that correlates favorably with the experimental absorption spectra in ethanol.
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Affiliation(s)
- John M Villegas
- Department of Chemistry, Wichita State University, 1845 North Fairmount Street, Wichita, Kansas 67260-0051, USA
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25
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Pomeranc D, Heitz V, Chambron JC, Sauvage JP. Octahedral Fe(II) and Ru(II) complexes based on a new bis 1,10-phenanthroline ligand that imposes a well defined axis. J Am Chem Soc 2001; 123:12215-21. [PMID: 11734021 DOI: 10.1021/ja011250y] [Citation(s) in RCA: 62] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A bis-chelating ligand (L1), made of two 7-(p-anisyl)-1,10-phenanthroline (phen) subunits connected with a p-(CH(2))(2)C(6)H(4)(CH(2))(2) spacer through their 4 positions, has been prepared, using Skraup syntheses and reaction of the anion of 4-methyl-7-anisyl-1,10-phenanthroline with alpha,alpha'-dibromo-p-xylene. Its Fe(II) complex, [FeL1(dmbp)](PF(6))(2), was prepared in one step by reaction of L1 with [Fe(dmbp)(3)](PF(6))(2) (dmbp = 4,4'-dimethyl-2,2'-bipyridine). On the other hand, its Ru(II) complex, [RuL1(dmbp)](PF(6))(2), was prepared in two steps from Ru(CH(3)CN)(4)Cl(2) and L1, followed by reaction with dmbp. X-ray crystal structure analyses show that in the two octahedral complexes, ligand L1 coils around the metal by coordination of the axial and two equatorial positions. It defines a 21 A long axis (O.O distance) running through the central metal and the terminal anisyl substituents. The complexes were also characterized by (1)H NMR, mass spectrometry, cyclic voltammetry, electronic absorption, and, in the case of Ru(II), fluorescence spectroscopy.
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Affiliation(s)
- D Pomeranc
- Laboratoire de Chimie Organo-Minérale, UMR 7513 du CNRS, Université Louis Pasteur, Institut Le Bel, 4 rue Blaise Pascal, 67000 Strasbourg, France
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26
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TRISPHAT salts. Efficient NMR chiral shift and resolving agents for substituted cyclometallated ruthenium bis(diimine) complexes. J Organomet Chem 2001. [DOI: 10.1016/s0022-328x(01)00685-4] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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27
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Lacour J, Goujon-Ginglinger C, Torche-Haldimann S, Jodry J. Efficient Enantioselective Extraction of Tris(diimine)ruthenium(II) Complexes by Chiral, Lipophilic TRISPHAT Anions. Angew Chem Int Ed Engl 2000. [DOI: 10.1002/1521-3773(20001016)39:20<3695::aid-anie3695>3.0.co;2-m] [Citation(s) in RCA: 71] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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28
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Lacour J, Goujon-Ginglinger C, Torche-Haldimann S, Jodry J. Effiziente enantioselektive Extraktion von Tris(diimin)ruthenium(II)-Komplexen durch chirale, lipophile TRISPHAT-Anionen. Angew Chem Int Ed Engl 2000. [DOI: 10.1002/1521-3757(20001016)112:20<3830::aid-ange3830>3.0.co;2-r] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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29
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Hamada T, Sakaki S, Brunschwig BS, Fujita E, Wishart JF. High Enantioselectivity in the Electron Transfer Reaction between a Ru(II) Complex of Menbpy Anion Radical, [Ru(menbpy)3]+[menbpy = 4,4′-di{(1R,2S,5R)-(−)-menthoxycarbonyl}-2,2′-bipyridine] and [Co(acac)3]: A Pulse Radiolysis Study. CHEM LETT 1998. [DOI: 10.1246/cl.1998.1259] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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30
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Ziegler M. Charge-transfer excited state properties of chiral transition metal coordination compounds studied by chiroptical spectroscopy. Coord Chem Rev 1998. [DOI: 10.1016/s0010-8545(98)00186-6] [Citation(s) in RCA: 135] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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31
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Tsukahara K, Kaneko J, Miyaji T, Hara T, Kato M, Kimura M. Stereoselective Luminescence Quenching in the Complex of Excited Triplet State of Δ-Tris(2,2′-bipyridine)ruthenium(II) with Optically Active Viologens in an Aqueous Solution. CHEM LETT 1997. [DOI: 10.1246/cl.1997.455] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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33
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Fletcher NC, Keene FR, Viebrock H, von Zelewsky A. Molecular Architecture of Polynuclear Ruthenium Bipyridyl Complexes with Controlled Metal Helicity. Inorg Chem 1997; 36:1113-1121. [PMID: 11669677 DOI: 10.1021/ic960948n] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The synthesis of di- and trinuclear ruthenium(II) complexes is reported, where each metal center has a tris(bidentate) octahedral coordination sphere with predetermined stereochemistry. New members of the "Chiragen" ligand series, consisting of two linked chiral 4,5-pineno-2,2'-bipyridine groups, have been prepared, with small spacer units between the coordination centers (-(CH(2))(n)() {n = 0, 3} and -CH(2)(bpy)CH(2)-). X-ray structural data were obtained for the ligand Chiragen[3]. (Crystal data: orthorhombic, space group P2(1)2(1)2(1), a = 12.229(1) Å, b = 12.790(1) Å, c = 20.215(1) Å, V = 3161.8(4) Å(3), Z = 4.) Combination of the ligands with Ru(bpy)(2)Cl(2) (where bpy is 2,2'-bipyridine) led to a mixture of diastereomers, while the use of enantiomerically pure Delta- or Lambda-[Ru(bpy)(2)(py)(2)](dibenzoyltartrate) or Delta-Ru(CG[m-xyl])Cl(2) led to almost complete stereoselectivity in the products. Circular dichroism spectra show that the complexes are composed of one helical diastereomer, with the expected absolute configuration predetermined by the chiral building block used. Additionally, (1)H-NMR spectroscopy indicates C(2) point group symmetry for the structures in solution, confirming the absence of DeltaLambda diastereomers.
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Affiliation(s)
- Nicholas C. Fletcher
- Institute of Inorganic and Analytical Chemistry, University of Fribourg, Pérolles, CH-1700 Fribourg, Switzerland, and School of Molecular Sciences, James Cook University of North Queensland, Townsville, Queensland 4811, Australia
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34
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Extremely high stereoselectivity of novel helical ruthenium(II) complexes for photoinduced reduction of racemic-[Co(acac)3] (Hacacpentane-2,4-dione). J Photochem Photobiol A Chem 1996. [DOI: 10.1016/1010-6030(95)04286-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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35
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Ohkubo K, Watanabe M, Ohta H, Usui S. Novel photocatalytic asymmetrical synthesis of Δ (or Λ)-[Co(acac)3] (acac, pentane-2,4-dione) from [Co(acac)2(H2O)2] and Hacac with helical ruthenium (II) complexes. J Photochem Photobiol A Chem 1996. [DOI: 10.1016/1010-6030(95)04263-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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36
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Treadway JA, Loeb B, Lopez R, Anderson PA, Keene FR, Meyer TJ. Effect of Delocalization and Rigidity in the Acceptor Ligand on MLCT Excited-State Decay. Inorg Chem 1996; 35:2242-2246. [PMID: 11666419 DOI: 10.1021/ic950961s] [Citation(s) in RCA: 189] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
In its most simple form, the energy gap law for excited-state nonradiative decay predicts a linear dependence of ln k(nr) on the ground- to excited-state energy gap, where k(nr) is the rate constant for nonradiative decay. At this level of approximation, the energy gap law has been successfully applied to nonradiative decay in a wide array of MLCT excited states of polypyridyl complexes of Re(I), Ru(II), and Os(II). This relationship also predicts a dependence of k(nr) on the structural characteristics of the acceptor ligand. We report here a brief survey of the literature which suggests that such effects exist and have their origin in the extent of delocalization of the excited electron in the ligand pi framework and on acceptor ligand rigidity.
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Affiliation(s)
- Joseph A. Treadway
- Department of Chemistry, The University of North Carolina, CB#3290, Chapel Hill, North Carolina 27599-3290, Faculty of Chemistry, Pontificia Universidad Catolica de Chile, Casilla 306, Buzon 521, Santiago, Chile, and Department of Molecular Sciences, James Cook University of North Queensland, Townsville, Queensland 4811, Australia
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Nagao N, Mukaida M, Miki E, Mizumachi K, Ishimori T. Photoracemization of Ruthenium(II) Complexes with 2,2′-Bipyridine and Di-2-pyridylamine. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 1994. [DOI: 10.1246/bcsj.67.2447] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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38
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von Zeiewsky A, Belser P, Hayoz P, Dux R, Hua X, Suckling A, Stoeckli-Evans H. Tailor made coordination compounds for photochemical purposes. Coord Chem Rev 1994. [DOI: 10.1016/0010-8545(94)80026-x] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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39
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Ohkubo K, Hamada T, Ishida H, Fukushima M, Watanabe M. Stereoselective molecular recognition of enantiomeric cobalt(III) complexes by novel photosensitizers of helical ruthenium(II) complexes. ACTA ACUST UNITED AC 1994. [DOI: 10.1016/0304-5102(93)e0341-d] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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40
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Enantioselective and photocatalytic oxidation of 1,1′-bi-2-naphthol with a chiral ruthenium complex which includes molecular helicity. ACTA ACUST UNITED AC 1994. [DOI: 10.1016/0304-5102(93)e0271-h] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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41
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Ishida H, Hamada T, Fujishita YI, Saito Y, Ohkubo K. Molecular Mechanics Studies on the Ligand Conformation of Chiral Ruthenium Tris(2,2′-bipyridine)-Type Complexes. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 1993. [DOI: 10.1246/bcsj.66.714] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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42
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Ohkubo K, Hamada T, Watanabe M. Novel photoinduced asymmetric synthesis of Λ-[Co(acac)3] from Co(acac)2(H2O)2and Hacac catalysed by racemic complexes of Δ- and Λ-[Ru(menbpy)3]2+{menbpy = 4,4′-Di-[(1R,2S,5R)-(–)-menthoxycarbonyl)]-2,2′-bipyridine; Hacac = pentane-2,4-dione}. ACTA ACUST UNITED AC 1993. [DOI: 10.1039/c39930001070] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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43
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Hamada T, Ishida H, Usui S, Watanabe Y, Tsumura K, Ohkubo K. A novel photocatalytic asymmetric synthesis of (R)-(+)-1,1′-bi-2-naphthol derivatives by oxidative coupling of 3-substituted-2-naphthol with Δ-[Ru(menbpy)3]2+[menbpy = 4,4′-di(1R,2S,5R)-(–)-menthoxycarbonyl-2,2′-bipyridine], which posseses molecular helicity. ACTA ACUST UNITED AC 1993. [DOI: 10.1039/c39930000909] [Citation(s) in RCA: 59] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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44
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Hamada T, Ishida H, Kuwada M, Ohkubo K. Enantioselective and Photochemical Reduction of Co(acac)3Catalyzed by Protein-hybrid Ruthenium Porphyrin. CHEM LETT 1992. [DOI: 10.1246/cl.1992.1283] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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45
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Lappin A, Marusak RA. Stereoselectivity in electron transfer reactions involving metal ion complexes. Coord Chem Rev 1991. [DOI: 10.1016/0010-8545(91)80004-w] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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46
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Balzani V, Barigelletti F, Cola L. Metal complexes as light absorption and light emission sensitizers. Top Curr Chem (Cham) 1990. [DOI: 10.1007/3-540-52568-8_2] [Citation(s) in RCA: 93] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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48
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Juris A, Balzani V, Barigelletti F, Campagna S, Belser P, von Zelewsky A. Ru(II) polypyridine complexes: photophysics, photochemistry, eletrochemistry, and chemiluminescence. Coord Chem Rev 1988. [DOI: 10.1016/0010-8545(88)80032-8] [Citation(s) in RCA: 4053] [Impact Index Per Article: 112.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Kliger DS, Lewis JW. Recent advances in time resolved circular dichroism spectroscopy. ACTA ACUST UNITED AC 1987. [DOI: 10.1007/bf03055509] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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50
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Henderson LJ, Cherry WR. Dynamics of ligand field excited states in polypyridine ruthenium(II) complexes. Chem Phys Lett 1985. [DOI: 10.1016/0009-2614(85)85140-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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