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Han A, Jia H, Ma H, Ye S, Wu H, Lei H, Han Y, Cao R, Du P. Cobalt porphyrin electrode films for electrocatalytic water oxidation. Phys Chem Chem Phys 2014; 16:11209-17. [DOI: 10.1039/c4cp00523f] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Two water-insoluble cobalt porphyrin complexes were synthesized and used to prepare electrode films on FTO. The films showed good activities and possible recyclability for water oxidation catalysis under benign conditions. No heterogeneous cobalt oxides were observed in the reaction system, as have been confirmed by UV-vis spectroscopy, mass spectrometry, SEM, and EDX measurements.
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Affiliation(s)
- Ali Han
- CAS Key Laboratory of Materials for Energy Conversion
- Department of Materials Science and Engineering
- Department of Chemistry
- University of Science and Technology of China (USTC)
- Hefei, China
| | - Hongxing Jia
- CAS Key Laboratory of Materials for Energy Conversion
- Department of Materials Science and Engineering
- Department of Chemistry
- University of Science and Technology of China (USTC)
- Hefei, China
| | - Hao Ma
- CAS Key Laboratory of Materials for Energy Conversion
- Department of Materials Science and Engineering
- Department of Chemistry
- University of Science and Technology of China (USTC)
- Hefei, China
| | - Shifan Ye
- CAS Key Laboratory of Materials for Energy Conversion
- Department of Materials Science and Engineering
- Department of Chemistry
- University of Science and Technology of China (USTC)
- Hefei, China
| | - Haotian Wu
- CAS Key Laboratory of Materials for Energy Conversion
- Department of Materials Science and Engineering
- Department of Chemistry
- University of Science and Technology of China (USTC)
- Hefei, China
| | - Haitao Lei
- Department of Chemistry
- Renmin University of China
- Beijing, China
| | - Yongzhen Han
- Department of Chemistry
- Renmin University of China
- Beijing, China
| | - Rui Cao
- Department of Chemistry
- Renmin University of China
- Beijing, China
| | - Pingwu Du
- CAS Key Laboratory of Materials for Energy Conversion
- Department of Materials Science and Engineering
- Department of Chemistry
- University of Science and Technology of China (USTC)
- Hefei, China
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Jung J, Ohkubo K, Prokop-Prigge KA, Neu HM, Goldberg DP, Fukuzumi S. Photochemical oxidation of a manganese(III) complex with oxygen and toluene derivatives to form a manganese(V)-oxo complex. Inorg Chem 2013; 52:13594-604. [PMID: 24219426 PMCID: PMC3875180 DOI: 10.1021/ic402121j] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Visible light photoirradiation of an oxygen-saturated benzonitrile solution of a manganese(III) corrolazine complex [(TBP8Cz)Mn(III)] (1): [TBP8Cz = octakis(p-tert-butylphenyl)corrolazinato(3-)] in the presence of toluene derivatives resulted in formation of the manganese(V)-oxo complex [(TBP8Cz)Mn(V)(O)]. The photochemical oxidation of (TBP8Cz)Mn(III) with O2 and hexamethylbenzene (HMB) led to the isosbestic conversion of 1 to (TBP8Cz)Mn(V)(O), accompanied by the selective oxidation of HMB to pentamethylbenzyl alcohol (87%). The formation rate of (TBP8Cz)Mn(V)(O) increased with methyl group substitution, from toluene, p-xylene, mesitylene, durene, pentamethylbenzene, up to hexamethylbenzene. Deuterium kinetic isotope effects (KIEs) were observed for toluene (KIE = 5.4) and mesitylene (KIE = 5.3). Femtosecond laser flash photolysis of (TBP8Cz)Mn(III) revealed the formation of a tripquintet excited state, which was rapidly converted to a tripseptet excited state. The tripseptet excited state was shown to be the key, activated state that reacts with O2 via a diffusion-limited rate constant. The data allow for a mechanism to be proposed in which the tripseptet excited state reacts with O2 to give the putative (TBP8Cz)Mn(IV)(O2(•-)), which then abstracts a hydrogen atom from the toluene derivatives in the rate-determining step. The mechanism of hydrogen abstraction is discussed by comparison of the reactivity with the hydrogen abstraction from the same toluene derivatives by cumylperoxyl radical. Taken together, the data suggest a new catalytic method is accessible for the selective oxidation of C-H bonds with O2 and light, and the first evidence for catalytic oxidation of C-H bonds was obtained with 10-methyl-9,10-dihydroacridine as a substrate.
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Affiliation(s)
- Jieun Jung
- Department of Material and Life Science, Graduate School of Engineering, ALCA, Japan Science and Technology Agency, Osaka University, Suita, Osaka 565-0871, Japan
| | - Kei Ohkubo
- Department of Material and Life Science, Graduate School of Engineering, ALCA, Japan Science and Technology Agency, Osaka University, Suita, Osaka 565-0871, Japan
| | | | - Heather M. Neu
- Department of Chemistry, The Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - David P. Goldberg
- Department of Chemistry, The Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Shunichi Fukuzumi
- Department of Material and Life Science, Graduate School of Engineering, ALCA, Japan Science and Technology Agency, Osaka University, Suita, Osaka 565-0871, Japan
- Department of Bioinspired Science, Ewha Womans University, Seoul 120-750, Korea
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Yamaguchi K, Shoji M, Isobe H, Kitagawa Y, Yamada S, Kawakami T, Yamanaka S, Okumura M. Theory of chemical bonds in metalloenzymes XVI. Oxygen activation by high-valent transition metal ions in native and artificial systems. Polyhedron 2013. [DOI: 10.1016/j.poly.2013.05.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Yu F, Pecoraro VL. Use of the mechanistic probe 2-methyl-1-phenylpropan-2-yl hydroperoxide (MPPH) to discriminate between the formation of MnIVMnIV(OH) and MnIVMnVO species. Polyhedron 2013. [DOI: 10.1016/j.poly.2013.02.074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Tikhonov AN. pH-dependent regulation of electron transport and ATP synthesis in chloroplasts. PHOTOSYNTHESIS RESEARCH 2013; 116:511-34. [PMID: 23695653 DOI: 10.1007/s11120-013-9845-y] [Citation(s) in RCA: 120] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2013] [Accepted: 04/25/2013] [Indexed: 05/02/2023]
Abstract
This review is focused on pH-dependent mechanisms of regulation of photosynthetic electron transport and ATP synthesis in chloroplasts. The light-induced acidification of the thylakoid lumen is known to decelerate the plastoquinol oxidation by the cytochrome b 6 f complex, thus impeding the electron flow between photosystem II and photosystem I. Acidification of the lumen also triggers the dissipation of excess energy in the light-harvesting antenna of photosystem II, thereby protecting the photosynthetic apparatus against a solar stress. After brief description of structural and functional organization of the chloroplast electron transport chain, our attention is focused on the nature of the rate-limiting step of electron transfer between photosystem II and photosystem I. In the context of pH-dependent mechanism of photosynthetic control in chloroplasts, the mechanisms of plastoquinol oxidation by the cytochrome b 6 f complex have been considered. The light-induced alkalization of stroma is another factor of pH-dependent regulation of electron transport in chloroplasts. Alkalization of stroma induces activation of the Bassham-Benson-Calvin cycle reactions, thereby promoting efflux of electrons from photosystem I to NADP(+). The mechanisms of the light-induced activation of ATP synthase are briefly considered.
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Affiliation(s)
- Alexander N Tikhonov
- Department of Biophysics, Faculty of Physics, M. V. Lomonosov, Moscow State University, Moscow, Russia,
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Mitra M, Maji AK, Ghosh BK, Kaur G, Roy Choudhury A, Lin CH, Ribas J, Ghosh R. Synthesis, crystallographic characterization and catecholase activity of a monocopper(II) and a dimanganese(III) complex with an anionic Schiff base ligand. Polyhedron 2013. [DOI: 10.1016/j.poly.2013.05.017] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Chlorophyll fluorescence in the leaves of Tradescantia species of different ecological groups: induction events at different intensities of actinic light. Biosystems 2013; 114:85-97. [PMID: 23948518 DOI: 10.1016/j.biosystems.2013.08.001] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2013] [Revised: 07/18/2013] [Accepted: 08/02/2013] [Indexed: 11/23/2022]
Abstract
Chlorophyll fluorescence analysis is one of the most convenient and widespread techniques used to monitor photosynthesis performance in plants. In this work, after a brief overview of the mechanisms of regulation of photosynthetic electron transport and protection of photosynthetic apparatus against photodamage, we describe results of our study of the effects of actinic light intensity on photosynthetic performance in Tradescantia species of different ecological groups. Using the chlorophyll fluorescence as a probe of photosynthetic activity, we have found that the shade-tolerant species Tradescantia fluminensis shows a higher sensitivity to short-term illumination (≤20min) with low and moderate light (≤200μEm(-2)s(-1)) as compared with the light-resistant species Tradescantia sillamontana. In T. fluminensis, non-photochemical quenching of chlorophyll fluorescence (NPQ) and photosystem II operational efficiency (parameter ΦPSII) saturate as soon as actinic light reaches ≈200μEm(-2)s(-1). Otherwise, T. sillamontana revealed a higher capacity for NPQ at strong light (≥800μEm(-2)s(-1)). The post-illumination adaptation of shade-tolerant plants occurs slower than in the light-resistant species. The data obtained are discussed in terms of reactivity of photosynthetic apparatus to short-term variations of the environment light.
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Smeltz JL, Lilly CP, Boyle PD, Ison EA. The electronic nature of terminal oxo ligands in transition-metal complexes: ambiphilic reactivity of oxorhenium species. J Am Chem Soc 2013; 135:9433-41. [PMID: 23725588 DOI: 10.1021/ja401390v] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The synthesis of the Lewis acid-base adducts of B(C6F5)3 and BF3 with [DAAmRe(O)(X)] DAAm = N,N-bis(2-arylaminoethyl)methylamine; aryl = C6F5 (X = Me, 1, COCH3, 2, Cl, 3) as well as their diamidopyridine (DAP) (DAP=(2,6-bis((mesitylamino)methyl)pyridine) analogues, [DAPRe(O)(X)] (X = Me, 4, Cl, 5, I, 6, and COCH3,7), are described. In these complexes the terminal oxo ligands act as nucleophiles. In addition we also show that stoichiometric reactions between 3 and triarylphosphine (PAr3) result in the formation of triarylphosphine oxide (OPAr3). The electronic dependence of this reaction was studied by comparing the rates of oxygen atom transfer for various para-substituted triaryl phosphines in the presence of CO. From these experiments a reaction constant ρ = -0.29 was obtained from the Hammett plot. This suggests that the oxygen atom transfer reaction is consistent with nucleophilic attack of phosphorus on an electrophilic metal oxo. To the best of our knowledge, these are the first examples of mono-oxo d(2) metal complexes in which the oxo ligand exhibits ambiphilic reactivity.
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Affiliation(s)
- Jessica L Smeltz
- Department of Chemistry, North Carolina State University, 2620 Yarbrough Drive, Raleigh, North Carolina 27695-8204, United States
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60
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Yang PP, Zhu LL, Xu Y, Shao CY. Synthesis, Crystal Structures, and Magnetic Properties of Two Tetrahedral MnIIMnIII3Complexes. Z Anorg Allg Chem 2013. [DOI: 10.1002/zaac.201300149] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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61
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Najafpour MM, Amouzadeh Tabrizi M, Haghighi B, Govindjee. A 2-(2-hydroxyphenyl)-1H-benzimidazole-manganese oxide hybrid as a promising structural model for the tyrosine 161/histidine 190-manganese cluster in photosystem II. Dalton Trans 2013. [PMID: 23178300 DOI: 10.1039/c2dt32236f] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this communication, we report the synthesis, characterization, and electrochemistry of a 2-(2-hydroxyphenyl)-1H-benzimidazole-manganese oxide hybrid. Our results suggest that this compound is a promising model for the manganese cluster together with tyrosine-161 and histidine-190 in photosystem II of plants, algae and cyanobacteria.
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Affiliation(s)
- Mohammad Mahdi Najafpour
- Department of Chemistry, Institute for Advanced Studies in Basic Sciences, Zanjan, 45137-66731, Iran.
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Vinyard DJ, Ananyev GM, Charles Dismukes G. Photosystem II: The Reaction Center of Oxygenic Photosynthesis. Annu Rev Biochem 2013; 82:577-606. [DOI: 10.1146/annurev-biochem-070511-100425] [Citation(s) in RCA: 279] [Impact Index Per Article: 25.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- David J. Vinyard
- Department of Chemistry and Chemical Biology and the Waksman Institute of Microbiology, Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854; ,
- Department of Chemistry, Princeton University, Princeton, New Jersey 08540;
| | - Gennady M. Ananyev
- Department of Chemistry and Chemical Biology and the Waksman Institute of Microbiology, Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854; ,
| | - G. Charles Dismukes
- Department of Chemistry and Chemical Biology and the Waksman Institute of Microbiology, Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854; ,
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63
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Eckenhoff WT, McNamara WR, Du P, Eisenberg R. Cobalt complexes as artificial hydrogenases for the reductive side of water splitting. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 2013; 1827:958-73. [PMID: 23689026 DOI: 10.1016/j.bbabio.2013.05.003] [Citation(s) in RCA: 133] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2012] [Revised: 04/19/2013] [Accepted: 05/09/2013] [Indexed: 10/26/2022]
Abstract
The generation of H2 from protons and electrons by complexes of cobalt has an extensive history. During the past decade, interest in this subject has increased as a result of developments in hydrogen generation that are driven electrochemically or photochemically. This article reviews the subject of hydrogen generation using Co complexes as catalysts and discusses the mechanistic implications of the systems studied for making H2. This article is part of a Special Issue entitled: Metals in Bioenergetics and Biomimetics Systems.
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64
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Jarvis EA, Lee B, Neddenriep B, Shoemaker W. Computational comparison of stepwise oxidation and O–O bond formation in mononuclear ruthenium water oxidation catalysts. Chem Phys 2013. [DOI: 10.1016/j.chemphys.2013.03.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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65
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66
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Inui Y, Shiro M, Kusukawa T, Fukuzumi S, Kojima T. A triangular prismatic hexanuclear iridium(III) complex bridged by flavin analogues showing reversible redox processes. Dalton Trans 2013; 42:2773-8. [PMID: 23235491 DOI: 10.1039/c2dt32535g] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
[Ir(6)(μ-alloCl(2)(2-))(3)(Cp*)(6)(OH)(3)](PF(6))(3) (1) having 7,8-dichloroalloxazine dianion (alloCl(2)(2-)) as bridging ligands was synthesized and characterized by X-ray crystallography, spectroscopic and electrochemical measurements. The alloxazine ligands showed unprecedented coordination modes to link the six Ir(III) centres. The complex exhibited remarkable stability and reversible six-electron redox processes at the bridging alloxazine ligands in organic solvents. The first reversible reduction process occurred on each of three alloxazine ligands in 1 to produce a three-electron-reduced species, [Ir(III)(6)Cp*(6)(μ-alloCl(2)˙(3-))(3)(OH)(3)], and was observed as an apparent one-step reduction process at -0.65 V (vs. Fc(0/+)). The second reversible reduction process on each of the three alloxazine ligands in 1 was recorded at almost the same potential, -0.78 V (vs. Fc(0/+)), to afford the six-electron-reduced form, [Ir(III)(6)Cp*(6)(μ-alloCl(2)(4-))(3)(OH)(3)](3-). The radical anion of the alloxazine derivative was detected by EPR measurements at room temperature. After the six-electron reduction of 1 with cobaltocene, the backward oxidation processes of reduced forms with p-chloranil were traced by UV-Vis spectroscopy to confirm the recovery of the original spectrum of 1.
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Affiliation(s)
- Yuji Inui
- Department of Material and Life Science, Graduate School of Engineering, Osaka University, and ALCA (JST), 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan
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67
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Park YJ, Cook SA, Sickerman NS, Sano Y, Ziller JW, Borovik AS. Heterobimetallic Complexes with M III-( μ-OH)-M II Cores (M III = Fe, Mn, Ga; M II = Ca, Sr, and Ba): Structural, Kinetic, and Redox Properties. Chem Sci 2013; 4:717-726. [PMID: 24058726 PMCID: PMC3777273 DOI: 10.1039/c2sc21400h] [Citation(s) in RCA: 79] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The effects of redox-inactive metal ions on dioxygen activation were explored using a new FeII complex containing a tripodal ligand with 3 sulfonamido groups. This iron complex exhibited a faster initial rate for the reduction of O2 than its MnII analog. Increases in initial rates were also observed in the presence of group 2 metal ions for both the FeII and MnII complexes, which followed the trend NMe4+ < BaII < CaII = SrII. These studies led to the isolation of heterobimetallic complexes containing FeIII-(μ-OH)-MII cores (MII = Ca, Sr, and Ba) and one with a [SrII(OH)MnIII]+ motif. The analogous [CaII(OH)GaIII]+ complex was also prepared and its solid state molecular structure is nearly identical to that of the [CaII(OH)FeIII]+ system. Nuclear magnetic resonance studies indicated that the diamagnetic [CaII(OH)GaIII]+ complex retained its structure in solution. Electrochemical measurements on the heterobimetallic systems revealed similar one-electron reduction potentials for the [CaII(OH)FeIII]+ and [SrII(OH)FeIII]+ complexes, which were more positive than the potential observed for [BaII(OH)FeIII]+. Similar results were obtained for the heterobimetallic MnII complexes. These findings suggest that Lewis acidity is not the only factor to consider when evaluating the effects of group 2 ions on redox processes, including those within the oxygen-evolving complex of Photosystem II.
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Affiliation(s)
- Young Jun Park
- Department of Chemistry, University of California-Irvine, 1102 Natural Sciences II, Irvine, CA, 92697-2025, USA. Fax: 949-824-8571; Tel: 949-824-1510
| | - Sarah A. Cook
- Department of Chemistry, University of California-Irvine, 1102 Natural Sciences II, Irvine, CA, 92697-2025, USA. Fax: 949-824-8571; Tel: 949-824-1510
| | - Nathaniel S. Sickerman
- Department of Chemistry, University of California-Irvine, 1102 Natural Sciences II, Irvine, CA, 92697-2025, USA. Fax: 949-824-8571; Tel: 949-824-1510
| | - Yohei Sano
- Department of Chemistry, University of California-Irvine, 1102 Natural Sciences II, Irvine, CA, 92697-2025, USA. Fax: 949-824-8571; Tel: 949-824-1510
| | - Joseph W. Ziller
- Department of Chemistry, University of California-Irvine, 1102 Natural Sciences II, Irvine, CA, 92697-2025, USA. Fax: 949-824-8571; Tel: 949-824-1510
| | - A. S. Borovik
- Department of Chemistry, University of California-Irvine, 1102 Natural Sciences II, Irvine, CA, 92697-2025, USA. Fax: 949-824-8571; Tel: 949-824-1510
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68
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Symes MD, Lutterman DA, Teets TS, Anderson BL, Breen JJ, Nocera DG. Photo-active cobalt cubane model of an oxygen-evolving catalyst. CHEMSUSCHEM 2013; 6:65-69. [PMID: 23288784 DOI: 10.1002/cssc.201200682] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2012] [Indexed: 06/01/2023]
Abstract
A dyad complex has been constructed as a soluble molecular model of a heterogeneous cobalt-based oxygen-evolving catalyst (Co-OEC). To this end, the Co(4)O(4) core of a cobalt-oxo cubane was covalently appended to Re(I) photosensitisers. The resulting adduct was characterised both in the solid state (by X-ray diffraction) and in solution using a variety of techniques. In particular, the covalent attachment of the Re(I) moieties to the Co(4)O(4) core promotes emission quenching of the Re(I) photocentres, with implications for the energy and electron transduction process of Co-OEC-like catalysts.
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Affiliation(s)
- Mark D Symes
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA
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69
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Han A, Wu H, Sun Z, Jia H, Du P. Facile deposition of nanostructured cobalt oxide catalysts from molecular cobaloximes for efficient water oxidation. Phys Chem Chem Phys 2013; 15:12534-8. [DOI: 10.1039/c3cp52275j] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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70
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Fukuzumi S, Mizuno T, Ojiri T. Catalytic electron-transfer oxygenation of substrates with water as an oxygen source using manganese porphyrins. Chemistry 2012; 18:15794-804. [PMID: 23129350 DOI: 10.1002/chem.201202041] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2012] [Indexed: 11/10/2022]
Abstract
Manganese(V)-oxo-porphyrins are produced by the electron-transfer oxidation of manganese-porphyrins with tris(2,2'-bipyridine)ruthenium(III) ([Ru(bpy)(3)](3+); 2 equiv) in acetonitrile (CH(3)CN) containing water. The rate constants of the electron-transfer oxidation of manganese-porphyrins have been determined and evaluated in light of the Marcus theory of electron transfer. Addition of [Ru(bpy)(3)](3+) to a solution of olefins (styrene and cyclohexene) in CH(3)CN containing water in the presence of a catalytic amount of manganese-porphyrins afforded epoxides, diols, and aldehydes efficiently. Epoxides were converted to the corresponding diols by hydrolysis, and were further oxidized to the corresponding aldehydes. The turnover numbers vary significantly depending on the type of manganese-porphyrin used owing to the difference in their oxidation potentials and the steric bulkiness of the ligand. Ethylbenzene was also oxidized to 1-phenylethanol using manganese-porphyrins as electron-transfer catalysts. The oxygen source in the substrate oxygenation was confirmed to be water by using (18)O-labeled water. The rate constant of the reaction of the manganese(V)-oxo species with cyclohexene was determined directly under single-turnover conditions by monitoring the increase in absorbance attributable to the manganese(III) species produced in the reaction with cyclohexene. It has been shown that the rate-determining step in the catalytic electron-transfer oxygenation of cyclohexene is electron transfer from [Ru(bpy)(3)](3+) to the manganese-porphyrins.
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Affiliation(s)
- Shunichi Fukuzumi
- Department of Material and Life Science, Graduate School of Engineering, Osaka University, ALCA, Japan Science and Technology Agency, Suita, Japan.
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71
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Najafpour MM, Moghaddam AN, Yang YN, Aro EM, Carpentier R, Eaton-Rye JJ, Lee CH, Allakhverdiev SI. Biological water-oxidizing complex: a nano-sized manganese-calcium oxide in a protein environment. PHOTOSYNTHESIS RESEARCH 2012; 114:1-13. [PMID: 22941557 DOI: 10.1007/s11120-012-9778-x] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2012] [Accepted: 08/20/2012] [Indexed: 06/01/2023]
Abstract
The resolution of Photosystem II (PS II) crystals has been improved using isolated PS II from the thermophilic cyanobacterium Thermosynechococcus vulcanus. The new 1.9 Å resolution data have provided detailed information on the structure of the water-oxidizing complex (Umena et al. Nature 473: 55-61, 2011). The atomic level structure of the manganese-calcium cluster is important for understanding the mechanism of water oxidation and to design an efficient catalyst for water oxidation in artificial photosynthetic systems. Here, we have briefly reviewed our knowledge of the structure and function of the cluster.
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Hetterscheid DGH, Reek JNH. Mononuclear Water Oxidation Catalysts. Angew Chem Int Ed Engl 2012; 51:9740-7. [DOI: 10.1002/anie.201202948] [Citation(s) in RCA: 160] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2012] [Indexed: 11/11/2022]
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74
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Najafpour MM, Moghaddam AN, Allakhverdiev SI, Govindjee. Biological water oxidation: lessons from nature. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 2012; 1817:1110-21. [PMID: 22507946 DOI: 10.1016/j.bbabio.2012.04.002] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2012] [Revised: 04/02/2012] [Accepted: 04/04/2012] [Indexed: 01/03/2023]
Abstract
Hydrogen production by water splitting may be an appealing solution for future energy needs. To evolve hydrogen efficiently in a sustainable manner, it is necessary first to synthesize what we may call a 'super catalyst' for water oxidation, which is the more challenging half reaction of water splitting. An efficient system for water oxidation exists in the water oxidizing complex in cyanobacteria, algae and plants; further, recently published data on the Manganese-calcium cluster have provided details on the mechanism and structure of the water oxidizing complex. Here, we have briefly reviewed the characteristics of the natural system from the standpoint of what we could learn from it to produce an efficient artificial system. In short, to design an efficient water oxidizing complex for artificial photosynthesis, we must learn and use wisely the knowledge about water oxidation and the water oxidizing complex in the natural system. This article is part of a Special Issue entitled: Photosynthesis Research for Sustainability: from Natural to Artificial.
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75
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Najafpour MM, Pashaei B, Nayeri S. Nano-sized layered aluminium or zinc–manganese oxides as efficient water oxidizing catalysts. Dalton Trans 2012; 41:7134-40. [DOI: 10.1039/c2dt30353a] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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76
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Najafpour MM, Moghaddam AN. Nano-sized manganese oxide: a proposed catalyst for water oxidation in the reaction of some manganese complexes and cerium(iv) ammonium nitrate. Dalton Trans 2012; 41:10292-7. [DOI: 10.1039/c2dt30965c] [Citation(s) in RCA: 87] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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77
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Najafpour MM, Rahimi F, Amini M, Nayeri S, Bagherzadeh M. A very simple method to synthesize nano-sized manganese oxide: an efficient catalyst for water oxidation and epoxidation of olefins. Dalton Trans 2012; 41:11026-31. [DOI: 10.1039/c2dt30553d] [Citation(s) in RCA: 82] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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78
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Wiechen M, Berends HM, Kurz P. Wateroxidation catalysed by manganese compounds: from complexes to ‘biomimetic rocks’. Dalton Trans 2012; 41:21-31. [PMID: 22068958 DOI: 10.1039/c1dt11537e] [Citation(s) in RCA: 164] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
- Mathias Wiechen
- Institute for Inorganic Chemistry, Christian-Albrechts-University Kiel, Max-Eyth-Straße 2, 24118, Kiel, Germany
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79
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Najafpour MM, Tabrizi MA, Haghighi B, Govindjee. A manganese oxide with phenol groups as a promising structural model for water oxidizing complex in Photosystem II: a ‘golden fish’. Dalton Trans 2012; 41:3906-10. [DOI: 10.1039/c2dt11672c] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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80
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Surendranath Y, Nocera DG. Oxygen Evolution Reaction Chemistry of Oxide-Based Electrodes. PROGRESS IN INORGANIC CHEMISTRY 2011. [DOI: 10.1002/9781118148235.ch9] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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81
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Maass JS, Chen Z, Zeller M, Luck RL. Expanding molecular transition metal cubane clusters of the form [M4(μ3)-O)4]12+: syntheses, spectroscopic and structural characterizations of molecules M4(μ3-O)4(O2P(Bn)2)4(O4), M = V(V) and W(V). Dalton Trans 2011; 40:11356-8. [PMID: 21976014 DOI: 10.1039/c1dt11375e] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Oxidizing the trimer V(3)(μ(3)-O)(O(2))(μ(2)-O(2)P(Bn)(2))(6)(H(2)O) in the presence of excess (t)BuOOH results in V(4)(μ(3)-O)(4)(μ(2)-O(2)P(Bn)(2))(4)(O(4)) and heating W(CO)(6) and bis(benzyl)phosphinic acid in 1:1 EtOH/THF at 120 °C produces W(4)(μ(3)-O)(4)(μ(2)-O(2)P(Bn)(2))(4)(O(4)).
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Affiliation(s)
- John S Maass
- Department of Chemistry, Michigan Technological University, 1400 Townsend Drive, Houghton, MI 49931, USA
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82
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Saha A, Abboud KA, Christou G. New Mixed-Valent Mn Clusters from the Use of N,N,N′,N′-Tetrakis(2-hydroxyethyl)ethylenediamine (edteH4): Mn3, Mn4, Mn6, and Mn10. Inorg Chem 2011; 50:12774-84. [DOI: 10.1021/ic201916d] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Arpita Saha
- Department
of Chemistry, University of Florida, Gainesville, Florida 32611-7200, United States
| | - Khalil A. Abboud
- Department
of Chemistry, University of Florida, Gainesville, Florida 32611-7200, United States
| | - George Christou
- Department
of Chemistry, University of Florida, Gainesville, Florida 32611-7200, United States
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83
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Protein Response of Rice Leaves to High Temperature Stress and Its Difference of Genotypes at Different Growth Stage. ZUOWU XUEBAO 2011. [DOI: 10.3724/sp.j.1006.2011.00820] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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84
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Bonin J, Robert M. Photoinduced Proton-Coupled Electron Transfers in Biorelevant Phenolic Systems. Photochem Photobiol 2011; 87:1190-203. [DOI: 10.1111/j.1751-1097.2011.00996.x] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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85
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Reece SY, Hamel JA, Sung K, Jarvi TD, Esswein AJ, Pijpers JJH, Nocera DG. Wireless Solar Water Splitting Using Silicon-Based Semiconductors and Earth-Abundant Catalysts. Science 2011; 334:645-8. [DOI: 10.1126/science.1209816] [Citation(s) in RCA: 1391] [Impact Index Per Article: 107.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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86
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Light-induced water oxidation at silicon electrodes functionalized with a cobalt oxygen-evolving catalyst. Proc Natl Acad Sci U S A 2011; 108:10056-61. [PMID: 21646536 DOI: 10.1073/pnas.1106545108] [Citation(s) in RCA: 182] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Integrating a silicon solar cell with a recently developed cobalt-based water-splitting catalyst (Co-Pi) yields a robust, monolithic, photo-assisted anode for the solar fuels process of water splitting to O(2) at neutral pH. Deposition of the Co-Pi catalyst on the Indium Tin Oxide (ITO)-passivated p-side of a np-Si junction enables the majority of the voltage generated by the solar cell to be utilized for driving the water-splitting reaction. Operation under neutral pH conditions fosters enhanced stability of the anode as compared to operation under alkaline conditions (pH 14) for which long-term stability is much more problematic. This demonstration of a simple, robust construct for photo-assisted water splitting is an important step towards the development of inexpensive direct solar-to-fuel energy conversion technologies.
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87
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Najafpour MM. Amorphous manganese-calcium oxides as a possible evolutionary origin for the CaMn₄ cluster in photosystem II. ORIGINS LIFE EVOL B 2011; 41:237-47. [PMID: 20814743 DOI: 10.1007/s11084-010-9224-z] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2009] [Accepted: 08/17/2010] [Indexed: 11/30/2022]
Abstract
In this paper a few calcium-manganese oxides and calcium-manganese minerals are studied as catalysts for water oxidation. The natural mineral marokite is also studied as a catalyst for water oxidation for the first time. Marokite is made up of edge-sharing Mn(3+) in a distorted octahedral environment and eight-coordinate Ca(2+) centered polyhedral layers. The structure is similar to recent models of the oxygen evolving complex in photosystem II. Thus, the oxygen evolving complex in photosystem II does not have an unusual structure and could be synthesized hydrothermally. Also in this paper, oxygen evolution is studied with marokite (CaMn₂O₄), pyrolusite (MnO₂) and compared with hollandite (Ba(0.2)Ca(0.15)K(0.3)Mn(6.9)Al(0.2)Si(0.3)O(16)), hausmannite (Mn₃O₄), Mn₂O₃.H₂O, Ca Mn₃O₆.H₂O, CaMn₄O₈.H₂O, CaMn₂O₄.H₂O and synthetic marokite (CaMn₂O₄). I propose that the origin of the oxygen evolving complex in photosystem II resulted from absorption of calcium and manganese ions that were precipitated together in the archean oceans by protocyanobacteria because of changing pH from ~5 to ~8-10. As reported in this paper, amorphous calcium-manganese oxides with different ratios of manganese and calcium are effective catalysts for water oxidation. The bond types and lengths of the calcium and manganese ions in the calcium-manganese oxides are directly comparable to those in the OEC. This primitive structure of these amorphous calcium-manganese compounds could be changed and modified by environmental groups (amino acids) to form the oxygen evolving complex in photosystem II.
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88
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Park YJ, Ziller JW, Borovik AS. The effects of redox-inactive metal ions on the activation of dioxygen: isolation and characterization of a heterobimetallic complex containing a Mn(III)-(μ-OH)-Ca(II) core. J Am Chem Soc 2011; 133:9258-61. [PMID: 21595481 DOI: 10.1021/ja203458d] [Citation(s) in RCA: 147] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Rate enhancements for the reduction of dioxygen by a Mn(II) complex were observed in the presence of redox-inactive group 2 metal ions. The rate changes were correlated with an increase in the Lewis acidity of the group 2 metal ions. These studies led to the isolation of heterobimetallic complexes containing Mn(III)-(μ-OH)-M(II) cores (M(II) = Ca(II), Ba(II)) in which the hydroxo oxygen atom is derived from O(2). This type of core structure has relevance to the oxygen-evolving complex within photosystem II.
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Affiliation(s)
- Young Jun Park
- Department of Chemistry, University of California-Irvine, 1102 Natural Sciences II, Irvine, California 92697, USA
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89
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Gärtner F, Cozzula D, Losse S, Boddien A, Anilkumar G, Junge H, Schulz T, Marquet N, Spannenberg A, Gladiali S, Beller M. Synthesis, Characterisation and Application of Iridium(III) Photosensitisers for Catalytic Water Reduction. Chemistry 2011; 17:6998-7006. [DOI: 10.1002/chem.201100235] [Citation(s) in RCA: 114] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2011] [Indexed: 11/07/2022]
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90
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Gärtner F, Boddien A, Barsch E, Fumino K, Losse S, Junge H, Hollmann D, Brückner A, Ludwig R, Beller M. Photocatalytic Hydrogen Generation from Water with Iron Carbonyl Phosphine Complexes: Improved Water Reduction Catalysts and Mechanistic Insights. Chemistry 2011; 17:6425-36. [DOI: 10.1002/chem.201003564] [Citation(s) in RCA: 95] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2010] [Revised: 03/04/2011] [Indexed: 11/05/2022]
Affiliation(s)
- Felix Gärtner
- Leibniz Institut für Katalyse, Albert‐Einstein Straße 29a, 18059 Rostock (Germany), Fax: (+49) 381‐12815000
| | - Albert Boddien
- Leibniz Institut für Katalyse, Albert‐Einstein Straße 29a, 18059 Rostock (Germany), Fax: (+49) 381‐12815000
| | - Enrico Barsch
- Leibniz Institut für Katalyse, Albert‐Einstein Straße 29a, 18059 Rostock (Germany), Fax: (+49) 381‐12815000
- Institut für Physikalische Chemie, Universität Rostock, Dr. Lorenz‐Weg 1, 18059 Rostock (Germany), Fax. (+49) 381‐4986524
| | - Koichi Fumino
- Institut für Physikalische Chemie, Universität Rostock, Dr. Lorenz‐Weg 1, 18059 Rostock (Germany), Fax. (+49) 381‐4986524
| | - Sebastian Losse
- Leibniz Institut für Katalyse, Albert‐Einstein Straße 29a, 18059 Rostock (Germany), Fax: (+49) 381‐12815000
| | - Henrik Junge
- Leibniz Institut für Katalyse, Albert‐Einstein Straße 29a, 18059 Rostock (Germany), Fax: (+49) 381‐12815000
| | - Dirk Hollmann
- Leibniz Institut für Katalyse, Albert‐Einstein Straße 29a, 18059 Rostock (Germany), Fax: (+49) 381‐12815000
| | - Angelika Brückner
- Leibniz Institut für Katalyse, Albert‐Einstein Straße 29a, 18059 Rostock (Germany), Fax: (+49) 381‐12815000
| | - Ralf Ludwig
- Leibniz Institut für Katalyse, Albert‐Einstein Straße 29a, 18059 Rostock (Germany), Fax: (+49) 381‐12815000
- Institut für Physikalische Chemie, Universität Rostock, Dr. Lorenz‐Weg 1, 18059 Rostock (Germany), Fax. (+49) 381‐4986524
| | - Matthias Beller
- Leibniz Institut für Katalyse, Albert‐Einstein Straße 29a, 18059 Rostock (Germany), Fax: (+49) 381‐12815000
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91
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Ovcharenko VI, Fokin SV, Fursova EY, Kuznetsova OV, Tretyakov EV, Romanenko GV, Bogomyakov AS. “Jumping Crystals”: Oxygen-Evolving Metal-Nitroxide Complexes. Inorg Chem 2011; 50:4307-12. [DOI: 10.1021/ic1022483] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Victor I. Ovcharenko
- International Tomography Center, Russian Academy of Sciences, 3A Institutskaya Street, 630090 Novosibirsk, Russian Federation
| | - Sergei V. Fokin
- International Tomography Center, Russian Academy of Sciences, 3A Institutskaya Street, 630090 Novosibirsk, Russian Federation
| | - Elena Yu. Fursova
- International Tomography Center, Russian Academy of Sciences, 3A Institutskaya Street, 630090 Novosibirsk, Russian Federation
| | - Olga V. Kuznetsova
- International Tomography Center, Russian Academy of Sciences, 3A Institutskaya Street, 630090 Novosibirsk, Russian Federation
| | - Eugene V. Tretyakov
- International Tomography Center, Russian Academy of Sciences, 3A Institutskaya Street, 630090 Novosibirsk, Russian Federation
| | - Galina V. Romanenko
- International Tomography Center, Russian Academy of Sciences, 3A Institutskaya Street, 630090 Novosibirsk, Russian Federation
| | - Artem S. Bogomyakov
- International Tomography Center, Russian Academy of Sciences, 3A Institutskaya Street, 630090 Novosibirsk, Russian Federation
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92
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Symes MD, Surendranath Y, Lutterman DA, Nocera DG. Bidirectional and Unidirectional PCET in a Molecular Model of a Cobalt-Based Oxygen-Evolving Catalyst. J Am Chem Soc 2011; 133:5174-7. [DOI: 10.1021/ja110908v] [Citation(s) in RCA: 118] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Mark D. Symes
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139-4307, United States
| | - Yogesh Surendranath
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139-4307, United States
| | - Daniel A. Lutterman
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139-4307, United States
| | - Daniel G. Nocera
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139-4307, United States
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93
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Ducat DC, Way JC, Silver PA. Engineering cyanobacteria to generate high-value products. Trends Biotechnol 2011; 29:95-103. [DOI: 10.1016/j.tibtech.2010.12.003] [Citation(s) in RCA: 310] [Impact Index Per Article: 23.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2010] [Revised: 12/06/2010] [Accepted: 12/08/2010] [Indexed: 10/18/2022]
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94
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Odom AL. Conversions between metal–ligand multiple bond (MLMB) types: carbonyl olefination and other applications. Dalton Trans 2011; 40:2689-95. [DOI: 10.1039/c0dt00825g] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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95
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Salomon E, Keren N. Manganese limitation induces changes in the activity and in the organization of photosynthetic complexes in the cyanobacterium Synechocystis sp. strain PCC 6803. PLANT PHYSIOLOGY 2011; 155:571-9. [PMID: 21088228 PMCID: PMC3075759 DOI: 10.1104/pp.110.164269] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2010] [Accepted: 11/17/2010] [Indexed: 05/19/2023]
Abstract
Manganese (Mn) ions are essential for oxygen evolution activity in photoautotrophs. In this paper, we demonstrate the dynamic response of the photosynthetic apparatus to changes in Mn bioavailability in cyanobacteria. Cultures of the cyanobacterium Synechocystis PCC 6803 could grow on Mn concentrations as low as 100 nm without any observable effect on their physiology. Below this threshold, a decline in the photochemical activity of photosystem II (PSII) occurred, as evident by lower oxygen evolution rates, lower maximal photosynthetic yield of PSII values, and faster Q(A) reoxidation rates. In 77 K chlorophyll fluorescence spectroscopy, a peak at 682 nm was observed. After ruling out the contribution of phycobilisome and iron stress-induced IsiA proteins, this band was attributed to the accumulation of partially assembled PSII. Surprisingly, the increase in the 682-nm peak was paralleled by a decrease in the 720-nm peak, dominated by PSI fluorescence. The effect on PSI was confirmed by measurements of the P(700) photochemical activity. The loss of activity was the result of two processes: loss of PSI core proteins and changes in the organization of PSI complexes. Blue native-polyacrylamide gel electrophoresis analysis revealed a Mn limitation-dependent dissociation of PSI trimers into monomers. The sensitive range for changes in the organization of the photosynthetic apparatus overlaps with the range of Mn concentrations measured in natural environments. We suggest that the ability to manipulate PSI content and organization allows cyanobacteria to balance electron transport rates between the photosystems. At naturally occurring Mn concentrations, such a mechanism will provide important protection against light-induced damage.
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Affiliation(s)
| | - Nir Keren
- Department of Plant and Environmental Sciences, Alexander Silberman Institute of Life Sciences, Givat Ram, Hebrew University of Jerusalem, Jerusalem 91904, Israel
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96
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Sameera WMC, McKenzie CJ, McGrady JE. On the mechanism of water oxidation by a bimetallic manganese catalyst: A density functional study. Dalton Trans 2011; 40:3859-70. [DOI: 10.1039/c0dt01362e] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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97
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Najafpour MM, Govindjee. Oxygen evolving complex in Photosystem II: Better than excellent. Dalton Trans 2011; 40:9076-84. [DOI: 10.1039/c1dt10746a] [Citation(s) in RCA: 75] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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98
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Zhou H, Fan T, Zhang D. An Insight into Artificial Leaves for Sustainable Energy Inspired by Natural Photosynthesis. ChemCatChem 2010. [DOI: 10.1002/cctc.201000266] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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99
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Dzhabiev TS. Functional chemical models of multielectron water oxidation in photosynthesis. KINETICS AND CATALYSIS 2010. [DOI: 10.1134/s0023158410060029] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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100
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Warren JJ, Tronic TA, Mayer JM. Thermochemistry of proton-coupled electron transfer reagents and its implications. Chem Rev 2010; 110:6961-7001. [PMID: 20925411 PMCID: PMC3006073 DOI: 10.1021/cr100085k] [Citation(s) in RCA: 1208] [Impact Index Per Article: 86.3] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Jeffrey J. Warren
- Department of Chemistry, University of Washington, Box 351700, Seattle, WA 98195-1700
| | - Tristan A. Tronic
- Department of Chemistry, University of Washington, Box 351700, Seattle, WA 98195-1700
| | - James M. Mayer
- Department of Chemistry, University of Washington, Box 351700, Seattle, WA 98195-1700
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