1
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Sil D, Khan FST, Rath SP. Effect of intermacrocyclic interactions: Modulation of metal spin-state in oxo/hydroxo/fluoro-bridged diiron(III)/dimanganese(III) porphyrin dimers. ADVANCES IN INORGANIC CHEMISTRY 2023. [DOI: 10.1016/bs.adioch.2022.08.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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2
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Ishizuka T, Grover N, Kingsbury CJ, Kotani H, Senge MO, Kojima T. Nonplanar porphyrins: synthesis, properties, and unique functionalities. Chem Soc Rev 2022; 51:7560-7630. [PMID: 35959748 DOI: 10.1039/d2cs00391k] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Porphyrins are variously substituted tetrapyrrolic macrocycles, with wide-ranging biological and chemical applications derived from metal chelation in the core and the 18π aromatic surface. Under suitable conditions, the porphyrin framework can deform significantly from regular planar shape, owing to steric overload on the porphyrin periphery or steric repulsion in the core, among other structure modulation strategies. Adopting this nonplanar porphyrin architecture allows guest molecules to interact directly with an exposed core, with guest-responsive and photoactive electronic states of the porphyrin allowing energy, information, atom and electron transfer within and between these species. This functionality can be incorporated and tuned by decoration of functional groups and electronic modifications, with individual deformation profiles adapted to specific key sensing and catalysis applications. Nonplanar porphyrins are assisting breakthroughs in molecular recognition, organo- and photoredox catalysis; simultaneously bio-inspired and distinctly synthetic, these molecules offer a new dimension in shape-responsive host-guest chemistry. In this review, we have summarized the synthetic methods and design aspects of nonplanar porphyrin formation, key properties, structure and functionality of the nonplanar aromatic framework, and the scope and utility of this emerging class towards outstanding scientific, industrial and environmental issues.
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Affiliation(s)
- Tomoya Ishizuka
- Department of Chemistry, Faculty of Pure and Applied Sciences, University of Tsukuba and CREST (JST), 1-1-1 Tennoudai, Tsukuba, Ibaraki 305-8571, Japan.
| | - Nitika Grover
- School of Chemistry, Chair of Organic Chemistry, Trinity Biomedical Sciences Institute, Trinity College Dublin, The University of Dublin, 152-160 Pearse Street, Dublin 2, Ireland
| | - Christopher J Kingsbury
- School of Chemistry, Chair of Organic Chemistry, Trinity Biomedical Sciences Institute, Trinity College Dublin, The University of Dublin, 152-160 Pearse Street, Dublin 2, Ireland
| | - Hiroaki Kotani
- Department of Chemistry, Faculty of Pure and Applied Sciences, University of Tsukuba and CREST (JST), 1-1-1 Tennoudai, Tsukuba, Ibaraki 305-8571, Japan.
| | - Mathias O Senge
- Institute for Advanced Study (TUM-IAS), Technical University of Munich, Focus Group - Molecular and Interfacial Engineering of Organic Nanosystems, Lichtenbergstrasse 2a, 85748 Garching, Germany.
| | - Takahiko Kojima
- Department of Chemistry, Faculty of Pure and Applied Sciences, University of Tsukuba and CREST (JST), 1-1-1 Tennoudai, Tsukuba, Ibaraki 305-8571, Japan.
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3
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Kour G, Mao X, Du A. First principles studies of mononuclear and dinuclear Pacman complexes for electrocatalytic reduction of CO 2. Catal Sci Technol 2021. [DOI: 10.1039/d0cy01757d] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
An iron-containing Pacman complex exhibited high activity and selectivity for the reduction of CO2 to CH4.
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Affiliation(s)
- Gurpreet Kour
- Centre for Materials Science and School of Chemistry and Physics
- Queensland University of Technology
- Brisbane
- Australia
| | - Xin Mao
- Centre for Materials Science and School of Chemistry and Physics
- Queensland University of Technology
- Brisbane
- Australia
| | - Aijun Du
- Centre for Materials Science and School of Chemistry and Physics
- Queensland University of Technology
- Brisbane
- Australia
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4
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Visible light generation of high-valent metal-oxo intermediates and mechanistic insights into catalytic oxidations. J Inorg Biochem 2020; 212:111246. [PMID: 33059321 DOI: 10.1016/j.jinorgbio.2020.111246] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Revised: 08/07/2020] [Accepted: 08/22/2020] [Indexed: 11/21/2022]
Abstract
High-valent metal-oxo complexes play central roles as active oxygen atom transfer (OAT) agents in many enzymatic and synthetic oxidation catalysis. This review focuses on our recent advances in application of photochemical approaches to probe the oxidizing metal-oxo species with different metals and macrocyclic ligands. Under visible light irradiation, a variety of important metal-oxo species including iron-oxo porphyrins, manganese-oxo porphyrin/corroles, ruthenium-oxo porphyrins, and chromium-oxo salens have been successfully generated. Kinetical studies in real time have provided mechanistic insights as to the reactivity and reaction pathways of the metal-oxo intermediates in their oxidation reactions. In photo-induced ligand cleavage reactions, metals in n+ oxidation state with the oxygen-containing ligands bromate, chlorate, or nitrites were photolyzed. Homolytic cleavage of the O-X bond in the ligand gives (n + 1)+ oxidation state metal-oxo species, and heterolytic cleavage gives (n + 2)+ oxidation state metal-oxo species. In photo-disproportionation reactions, reactive Mn+1-oxo species can be formed by photolysis of μ-oxo dimeric Mn+ complexes with the concomitant formation of Mn-1 products. Importantly, the oxidation of Mn-1 products by molecular oxygen (O2) to regenerate the μ-oxo dimeric Mn+ complexes in photo-disproportionation reactions represents an attractive and green catalytic cycle for the development of photocatalytic aerobic oxidations.
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5
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Moretti L, Kudisch B, Terazono Y, Moore AL, Moore TA, Gust D, Cerullo G, Scholes GD, Maiuri M. Ultrafast Dynamics of Nonrigid Zinc-Porphyrin Arrays Mimicking the Photosynthetic "Special Pair". J Phys Chem Lett 2020; 11:3443-3450. [PMID: 32290662 DOI: 10.1021/acs.jpclett.0c00856] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Conjugated porphyrin arrays are heavily investigated as efficient molecular systems for photosynthesis and photocatalysis. Recently, a series of one-, two-, and six-zinc-porphyrin arrays, noncovalently linked through benzene-based hubs, have been synthesized with the aim of mimicking the structure and function of the bacteriochlorophyll "special pair" in photosynthetic reaction centers. The excitonically coupled porphyrin subunits are expected to activate additional excited state relaxation channels with respect to the monomer. Here, we unveil the appearance of such supramolecular electronic interactions using ultrafast transient absorption spectroscopy with sub-25 fs time resolution. Upon photoexcitation of the Soret band, we resolve energy trapping within ∼150 fs in a delocalized dark excitonic manifold. Moreover, excitonic interactions promote an additional fast internal conversion from the Q-band to the ground state with an efficiency of up to 60% in the hexamer. These relaxation pathways appear to be common loss channels that limit the lifetime of the exciton states in noncovalently bound molecular aggregates.
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Affiliation(s)
- Luca Moretti
- IFN-CNR, Dipartimento di Fisica, Politecnico di Milano, P.za Leonardo da Vinci 32, 20133 Milan, Italy
- Department of Chemistry, Princeton University, Princeton, New Jersey 08540, United States
| | - Bryan Kudisch
- Department of Chemistry, Princeton University, Princeton, New Jersey 08540, United States
| | - Yuichi Terazono
- School of Molecular Sciences, Arizona State University, Tempe, Arizona 85287, United States
| | - Ana L Moore
- School of Molecular Sciences, Arizona State University, Tempe, Arizona 85287, United States
| | - Thomas A Moore
- School of Molecular Sciences, Arizona State University, Tempe, Arizona 85287, United States
| | - Devens Gust
- School of Molecular Sciences, Arizona State University, Tempe, Arizona 85287, United States
| | - Giulio Cerullo
- IFN-CNR, Dipartimento di Fisica, Politecnico di Milano, P.za Leonardo da Vinci 32, 20133 Milan, Italy
| | - Gregory D Scholes
- Department of Chemistry, Princeton University, Princeton, New Jersey 08540, United States
| | - Margherita Maiuri
- IFN-CNR, Dipartimento di Fisica, Politecnico di Milano, P.za Leonardo da Vinci 32, 20133 Milan, Italy
- Department of Chemistry, Princeton University, Princeton, New Jersey 08540, United States
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6
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Yamashita K, Kuramochi N, Pham Qui Van H, Furutani K, Ogawa T, Sugiura K. Efficient Synthesis of Arylenedioxy‐Bridged Porphyrin Dimers through Catalyst‐Free Nucleophilic Aromatic Substitution. Chempluschem 2020. [DOI: 10.1002/cplu.201900670] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Ken‐ichi Yamashita
- Department of Chemistry Graduate School of Science and Engineering Tokyo Metropolitan University Minami-Osawa, Hachioji Tokyo 192-0397 Japan
- Department of Chemistry Graduate School of Science Osaka University Machikaneyama, Toyonaka Osaka 560-0043 Japan
| | - Narumi Kuramochi
- Department of Chemistry Graduate School of Science and Engineering Tokyo Metropolitan University Minami-Osawa, Hachioji Tokyo 192-0397 Japan
| | - Hang Pham Qui Van
- Department of Chemistry Graduate School of Science and Engineering Tokyo Metropolitan University Minami-Osawa, Hachioji Tokyo 192-0397 Japan
| | - Kazuhiro Furutani
- Department of Chemistry Graduate School of Science Osaka University Machikaneyama, Toyonaka Osaka 560-0043 Japan
| | - Takuji Ogawa
- Department of Chemistry Graduate School of Science Osaka University Machikaneyama, Toyonaka Osaka 560-0043 Japan
| | - Ken‐ichi Sugiura
- Department of Chemistry Graduate School of Science and Engineering Tokyo Metropolitan University Minami-Osawa, Hachioji Tokyo 192-0397 Japan
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7
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Nehrkorn J, Bonke SA, Aliabadi A, Schwalbe M, Schnegg A. Examination of the Magneto-Structural Effects of Hangman Groups on Ferric Porphyrins by EPR. Inorg Chem 2019; 58:14228-14237. [PMID: 31599581 DOI: 10.1021/acs.inorgchem.9b02348] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Ferric hangman porphyrins are bioinspired models for haem hydroperoxidase enzymes featuring an acid/base group in close vicinity to the metal center, which results in improved catalytic activity for reactions requiring O-O bond activation. These functional biomimics are examined herein with a combination of EPR techniques to determine the effects of the hanging group on the electronics of the ferric center. These results are compared to those for ferric octaethylporphyrin chloride [Fe(OEP)Cl], tetramesitylporphyrin chloride [Fe(TMP)Cl], and the pentafluorophenyl derivative [Fe(TPFPP)Cl], which were also examined herein to study the electronic effects of various substituents. Frequency-domain Fourier-transform THz-EPR combined with field domain EPR in a broad frequency range from 9.5 to 629 GHz allowed the determination of zero-field splitting parameters, revealing minor rhombicity E/D and D values in a narrow range of 6.24(8) to 6.85(5) cm-1. Thus, the hangman porphyrins display D values in the expected range for ferric porphyrin chlorides, though D appears to be correlated with the Fe-Cl bond length. Extrapolating this trend to the ferric hangman porphyrin chlorides, for which no crystal structure has been reported, indicates a slightly elongated Fe-Cl bond length compared to the non-hangman equivalent.
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Affiliation(s)
- Joscha Nehrkorn
- EPR Research Group , Max-Planck-Institut für Chemische Energiekonversion , Stiftstraße 34-36 , 45470 Mülheim an der Ruhr , Germany.,Institut für Anorganische und Angewandte Chemie , Universität Hamburg , Martin-Luther-King-Platz 6 , 20146 Hamburg , Germany.,Institut Nanospektroskopie , Helmholtz-Zentrum Berlin für Materialien und Energie , Kekuléstraße 5 , 12489 Berlin , Germany
| | - Shannon A Bonke
- EPR Research Group , Max-Planck-Institut für Chemische Energiekonversion , Stiftstraße 34-36 , 45470 Mülheim an der Ruhr , Germany.,Institut Nanospektroskopie , Helmholtz-Zentrum Berlin für Materialien und Energie , Kekuléstraße 5 , 12489 Berlin , Germany
| | - Azar Aliabadi
- Institut Nanospektroskopie , Helmholtz-Zentrum Berlin für Materialien und Energie , Kekuléstraße 5 , 12489 Berlin , Germany
| | - Matthias Schwalbe
- Institut für Chemie , Humboldt Universität zu Berlin , Brook-Taylor-Straße 2 , 12489 Berlin , Germany
| | - Alexander Schnegg
- EPR Research Group , Max-Planck-Institut für Chemische Energiekonversion , Stiftstraße 34-36 , 45470 Mülheim an der Ruhr , Germany.,Institut Nanospektroskopie , Helmholtz-Zentrum Berlin für Materialien und Energie , Kekuléstraße 5 , 12489 Berlin , Germany
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8
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Zhang W, Dynes JJ, Hu Y, Jiang P, Ma S. Porous metal-metalloporphyrin gel as catalytic binding pocket for highly efficient synergistic catalysis. Nat Commun 2019; 10:1913. [PMID: 31015441 PMCID: PMC6478723 DOI: 10.1038/s41467-019-09881-9] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2018] [Accepted: 04/05/2019] [Indexed: 11/25/2022] Open
Abstract
Synergistic catalysis occurring in an enzyme pocket shows enhanced performance through supramolecular recognition and flexibility. This study presents an aerogel capable of similar function by fabricating a gel catalyst with hierarchical porosity. Here, the as-prepared Co-MMPG, a Co(II) metal-metalloporphyrin gel, maintains enough conformational flexibility and features a binding pocket formed from the co-facial arrangement of the porphyrin rings, as elucidated through the combined studies of solid-state NMR and X-ray absorption near-edge structure (XANES). The cooperativity between two Co(II) sites within the defined nanospace pocket facilitates the binding of different substrates with a favourable geometry thereby rendering Co-MMPG with excellent performance in the context of synergistic catalysis, especially for the kinetic control stereoselective reactions. Our work thus contributes a different enzyme-mimic design strategy to develop a highly efficient heterogeneous catalyst with high chemo/stereo selectivity. Synergistic catalysis occurring in an enzyme pocket shows enhanced performance through supramolecular recognition and flexibility. Here the authors design an enzyme-mimic strategy to develop a Co(II) metal-metalloporphyrin gel with excellent synergistically catalytic performance and chemo/stereo selectivity.
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Affiliation(s)
- Weijie Zhang
- The Key Laboratory of Food Colloids and Biotechnology, School of Chemical and Material Engineering, Jiangnan University, Wuxi, 214122, China.,Department of Chemistry, University of South Florida, 4202 East Fowler Avenue, Tampa, FL, 33620, USA
| | - James J Dynes
- Canadian Light Source, 44 Innovation Boulevard, Saskatoon, Saskatchewan, S7N 2V3, Canada
| | - Yongfeng Hu
- Canadian Light Source, 44 Innovation Boulevard, Saskatoon, Saskatchewan, S7N 2V3, Canada
| | - Pingping Jiang
- The Key Laboratory of Food Colloids and Biotechnology, School of Chemical and Material Engineering, Jiangnan University, Wuxi, 214122, China.
| | - Shengqian Ma
- Department of Chemistry, University of South Florida, 4202 East Fowler Avenue, Tampa, FL, 33620, USA.
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9
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Oldacre AN, Crawley MR, Friedman AE, Cook TR. Tuning the Activity of Heterogeneous Cofacial Cobalt Porphyrins for Oxygen Reduction Electrocatalysis through Self‐Assembly. Chemistry 2018; 24:10984-10987. [DOI: 10.1002/chem.201802585] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2018] [Indexed: 11/06/2022]
Affiliation(s)
- Amanda N. Oldacre
- Department of Chemistry University at Buffalo, The State University of New York Buffalo NY 14260 USA
| | - Matthew R. Crawley
- Department of Chemistry University at Buffalo, The State University of New York Buffalo NY 14260 USA
| | - Alan E. Friedman
- Department of Materials, Design, and Innovation University at Buffalo, The State University of New York Buffalo NY 14260 USA
| | - Timothy R. Cook
- Department of Chemistry University at Buffalo, The State University of New York Buffalo NY 14260 USA
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10
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Lang P, Schwalbe M. Pacman Compounds: From Energy Transfer to Cooperative Catalysis. Chemistry 2017; 23:17398-17412. [DOI: 10.1002/chem.201703675] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2017] [Indexed: 01/08/2023]
Affiliation(s)
- Philipp Lang
- Institut für Chemie; Humboldt-Universität zu Berlin; Brook-Taylor-St. 2 12489 Berlin Germany
| | - Matthias Schwalbe
- Institut für Chemie; Humboldt-Universität zu Berlin; Brook-Taylor-St. 2 12489 Berlin Germany
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11
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Oxo- and hydroxo-bridged diiron(III) porphyrin dimers: Inorganic and bio-inorganic perspectives and effects of intermacrocyclic interactions. Coord Chem Rev 2017. [DOI: 10.1016/j.ccr.2017.02.008] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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12
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Khan FST, Guchhait T, Sasmal S, Rath SP. Hydroxo-bridged diiron(iii) and dimanganese(iii) bisporphyrins: modulation of metal spins by counter anions. Dalton Trans 2017; 46:1012-1037. [DOI: 10.1039/c6dt03829h] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
A brief account has been presented on how the inter-heme interactions in μ-hydroxo diiron(iii) bisporphyrins and counter anions can induce significant change in the structure and properties including the iron spin state without affecting the overall topology.
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Affiliation(s)
| | - Tapas Guchhait
- Department of Chemistry
- Indian Institute of Technology Kanpur
- Kanpur-208016
- India
| | - Sujit Sasmal
- Department of Chemistry
- Indian Institute of Technology Kanpur
- Kanpur-208016
- India
| | - Sankar Prasad Rath
- Department of Chemistry
- Indian Institute of Technology Kanpur
- Kanpur-208016
- India
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13
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Photochemical generation of manganese(IV)-oxo porphyrins by visible light photolysis of dimanganese(III) μ-oxo bis-porphyrins. Inorganica Chim Acta 2016. [DOI: 10.1016/j.ica.2016.07.037] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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14
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Agnihotri N, Steer RP. Time dependent DFT investigation of the optical properties of artificial light harvesting special pairs. Phys Chem Chem Phys 2016; 18:15337-51. [DOI: 10.1039/c6cp00300a] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Simulated absorption spectra of (ZnTriPP)2DPB dimer in which Q band is enhanced 50 times for visibility.
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Affiliation(s)
- Neha Agnihotri
- Department of Physics
- Indian Institute of Technology (BHU)
- Varanasi-221005
- India
| | - Ronald P. Steer
- Department of Chemistry
- University of Saskatchewan
- Saskatoon
- Canada
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15
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Su DM, Zheng XJ, Schreckenbach G, Pan QJ. Highly Diverse Bonding between Two U3+ Ions When Ligated by a Flexible Polypyrrolic Macrocycle. Organometallics 2015. [DOI: 10.1021/acs.organomet.5b00649] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Dong-Mei Su
- Key
Laboratory of Functional Inorganic Material Chemistry of Education
Ministry, School of Chemistry and Materials Science, Heilongjiang University, Harbin, China 150080
| | - Xiu-Jun Zheng
- Key
Laboratory of Functional Inorganic Material Chemistry of Education
Ministry, School of Chemistry and Materials Science, Heilongjiang University, Harbin, China 150080
| | - Georg Schreckenbach
- Department
of Chemistry, University of Manitoba, Winnipeg, MB, Canada, R3T 2N2
| | - Qing-Jiang Pan
- Key
Laboratory of Functional Inorganic Material Chemistry of Education
Ministry, School of Chemistry and Materials Science, Heilongjiang University, Harbin, China 150080
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16
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A relativistic DFT probe of energetics and structural properties of catalytically important macrocyclic diuranium(III) complexes. Inorganica Chim Acta 2015. [DOI: 10.1016/j.ica.2015.08.011] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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17
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Terazono Y, Kodis G, Chachisvilis M, Cherry BR, Fournier M, Moore A, Moore TA, Gust D. Multiporphyrin arrays with π-π interchromophore interactions. J Am Chem Soc 2015; 137:245-58. [PMID: 25514369 DOI: 10.1021/ja510267c] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
A recently reported synthetic method has been employed to prepare several arrays of free base and zinc porphyrins. In the arrays, the porphyrins are arranged around a central benzene ring. The lack of aryl rings in the linkages to the central benzene ring, coupled with the presence of only one meso-aryl substituent on each porphyrin, allows strong electronic interactions between the porphyrin macrocycles. In arrays containing two or six porphyrins, a variety of evidence indicates that the porphyrins exist as twist-stacked dimers reminiscent of the special pairs of bacteriochlorophylls found in some photosynthetic bacteria. These dimers feature van der Waals contact between the macrocycles, and demonstrate excitonic splitting due to π-π interactions. The excitonic effects split and blue-shift the Soret absorptions, and slightly broaden the Q-band absorptions and shift them to longer wavelengths. The interactions also lower the first oxidation potentials by ca. 100 mV, and the arrays show evidence for delocalization of the radical cation over both porphyrins in the dimer. The arrays demonstrate singlet-singlet energy transfer among the chromophores. Arrays of this type will be good models for some aspects of the interactions of photosynthetic pigments, including those of reaction center special pairs and possibly quantum coherence effects. They can also be useful in artificial photosynthetic constructs.
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Affiliation(s)
- Yuichi Terazono
- Department of Chemistry and Biochemistry, Arizona State University , Tempe, Arizona 85287, United States
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18
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Doistau B, Cantin JL, Chamoreau LM, Marvaud V, Hasenknopf B, Vives G. Mechanical switching of magnetic interaction by tweezers-type complex. Chem Commun (Camb) 2015; 51:12916-9. [DOI: 10.1039/c5cc04980f] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
An original approach using a mechanical motion to control the magnetic interaction between the two spin centers of terpy(Cu–salphen)2 complexes is presented.
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Affiliation(s)
- Benjamin Doistau
- Sorbonne Universités
- UPMC Univ Paris 06
- UMR 8232
- Institut Parisien de Chimie Moléculaire
- France
| | | | - Lise-Marie Chamoreau
- Sorbonne Universités
- UPMC Univ Paris 06
- UMR 8232
- Institut Parisien de Chimie Moléculaire
- France
| | - Valérie Marvaud
- Sorbonne Universités
- UPMC Univ Paris 06
- UMR 8232
- Institut Parisien de Chimie Moléculaire
- France
| | - Bernold Hasenknopf
- Sorbonne Universités
- UPMC Univ Paris 06
- UMR 8232
- Institut Parisien de Chimie Moléculaire
- France
| | - Guillaume Vives
- Sorbonne Universités
- UPMC Univ Paris 06
- UMR 8232
- Institut Parisien de Chimie Moléculaire
- France
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19
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Schwalbe M, Wrzolek P, Lal G, Braun B. High‐Yielding Synthesis of a Hetero‐Pacman Compound and the Characterization of Intermediates and Side‐Products. Eur J Inorg Chem 2014. [DOI: 10.1002/ejic.201402459] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Matthias Schwalbe
- Institute of Chemistry, Humboldt‐Universität zu Berlin, Brook‐Taylor‐St. 2, 12489 Berlin, Germany, http://www.chemie.hu‐berlin.de/aglimberg/mschwalbe/ index.html
| | - Pierre Wrzolek
- Institute of Chemistry, Humboldt‐Universität zu Berlin, Brook‐Taylor‐St. 2, 12489 Berlin, Germany, http://www.chemie.hu‐berlin.de/aglimberg/mschwalbe/ index.html
| | - Garima Lal
- Institute of Chemistry, Humboldt‐Universität zu Berlin, Brook‐Taylor‐St. 2, 12489 Berlin, Germany, http://www.chemie.hu‐berlin.de/aglimberg/mschwalbe/ index.html
| | - Beatrice Braun
- Institute of Chemistry, Humboldt‐Universität zu Berlin, Brook‐Taylor‐St. 2, 12489 Berlin, Germany, http://www.chemie.hu‐berlin.de/aglimberg/mschwalbe/ index.html
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20
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Durot S, Flamigni L, Taesch J, Dang TT, Heitz V, Ventura B. Synthesis and Solution Studies of Silver(I)-Assembled Porphyrin Coordination Cages. Chemistry 2014; 20:9979-90. [DOI: 10.1002/chem.201402047] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2014] [Indexed: 11/10/2022]
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21
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Abstract
Plants and photosynthetic bacteria obtain their energy from sunlight or surrounding radiation. Their photosynthetic membranes are composed of a much elaborated series of antenna molecules based on chlorophylls or bacteriochlorophylls, carotenoids playing multiple roles, various electron transport accessories, and central special pairs. The latter components are the most difficult to mimic with exactitude because the structure−property relationship depends on many factors including interplanar distance, slip angle, substituents, metal, and axial ligand. To this list of factors to control with quasi-perfection, one should also add the thermal activation (i.e., temperature). Over the past 15 years or so (2001–2013), an intensive collaboration with Professor Roger Guilard (Université de Bourgogne, Dijon) dealt with elucidating the role of each parameter to provide the best design of artificial special pairs capable of responding or behaving like the natural special pairs, namely with regards with the antenna effect. The latest feature is one of the defence mechanisms slowing down the rate for the primary electron transfer from the special pair to the electron transport accessories. This review highlights the advances in this challenging area of mimicry of the photophysical events in biological systems, namely the artificial special pairs designed in our laboratory for the antenna processes.
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Affiliation(s)
- Pierre D. Harvey
- Département de Chimie, Université de Sherbrooke, Sherbrooke, Québec, Canada J1K 2R1
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Hirotsu M, Kawamoto K, Tanaka R, Nagai Y, Ueno K, Teki Y, Kinoshita I. Titanium and manganese complexes supported by a xanthene-bridged bis(tripodal N2O2) ligand: isomerization, intramolecular hydrogen bonding and metal-binding ability. Dalton Trans 2013; 42:12220-7. [DOI: 10.1039/c3dt51389k] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Fukuzumi S, Yamada Y, Karlin KD. Hydrogen Peroxide as a Sustainable Energy Carrier: Electrocatalytic Production of Hydrogen Peroxide and the Fuel Cell. Electrochim Acta 2012; 82:493-511. [PMID: 23457415 PMCID: PMC3584454 DOI: 10.1016/j.electacta.2012.03.132] [Citation(s) in RCA: 136] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
This review describes homogeneous and heterogeneous catalytic reduction of dioxygen with metal complexes focusing on the catalytic two-electron reduction of dioxygen to produce hydrogen peroxide. Whether two-electron reduction of dioxygen to produce hydrogen peroxide or four-electron O2-reduction to produce water occurs depends on the types of metals and ligands that are utilized. Those factors controlling the two processes are discussed in terms of metal-oxygen intermediates involved in the catalysis. Metal complexes acting as catalysts for selective two-electron reduction of oxygen can be utilized as metal complex-modified electrodes in the electrocatalytic reduction to produce hydrogen peroxide. Hydrogen peroxide thus produced can be used as a fuel in a hydrogen peroxide fuel cell. A hydrogen peroxide fuel cell can be operated with a one-compartment structure without a membrane, which is certainly more promising for the development of low-cost fuel cells as compared with two compartment hydrogen fuel cells that require membranes. Hydrogen peroxide is regarded as an environmentally benign energy carrier because it can be produced by the electrocatalytic two-electron reduction of O2, which is abundant in air, using solar cells; the hydrogen peroxide thus produced could then be readily stored and then used as needed to generate electricity through the use of hydrogen peroxide fuel cells.
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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 (JST), Suita, Osaka 565-0871, Japan
- Department of Bioinspired Science, Ewha Womans University, Seoul 120-750, Korea
| | - Yusuke Yamada
- Department of Material and Life Science, Graduate School of Engineering, Osaka University, ALCA, Japan Science and Technology Agency (JST), Suita, Osaka 565-0871, Japan
| | - Kenneth D. Karlin
- Department of Bioinspired Science, Ewha Womans University, Seoul 120-750, Korea
- Department of Chemistry, The Johns Hopkins University, Baltimore, MD 21218, USA
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Schwalbe M, Metzinger R, Teets TS, Nocera DG. Terpyridine-Porphyrin Hetero-Pacman Compounds. Chemistry 2012; 18:15449-58. [DOI: 10.1002/chem.201201728] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2012] [Revised: 08/20/2012] [Indexed: 12/31/2022]
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Bolze F, Drouin M, Harvey PD, Gros CP, Espinosa E, Guilard R. X-ray structures and luminescence properties of Co(II) and Co(III) complexes of cofacial diporphyrins. J PORPHYR PHTHALOCYA 2012. [DOI: 10.1142/s1088424603000604] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The crystal structures of two face-to-face diporphyrin compounds based upon the DPA ligand (1,8-bis(5-(2,8,13,17-tetraethyl-3,7,12,18-tetramethyl-porphyrinyl))anthracene), i.e. H 4( DPA ) and ( DPA ) Co 2 are reported. The structural data are compared to that of other bimetallic DPA systems, and diporphyrinic Co complexes. In addition, the luminescence properties of ( OEP ) Co ( OEP = 2,3,7,8,12,13,17,18-octaethylporphyrin), H 2( DPA ) Co , H 2( DPA )( CoIm ) O 2, ( DPA ) Co 2, ( DPA )( CoIm )2 O 2 are reported, where Im is 1-t-butyl-5-phenyl imidazole. Contrary to previous literature reports, the Co (II) species are found to be weakly luminescent, where fluorescence is detected for both the mono- and diporphyrinic systems, and is assigned to emissions arising from the lowest 1 Q (ππ*) states, while phosphorescence is detected at 77 K only for the monoporphyrin species, ( OEP ) Co . On the other hand, the Co (III) complexes are not luminescent.
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Affiliation(s)
- Frédéric Bolze
- Département de Chimie, Université de Sherbrooke, Sherbrooke, P.Q., J1K 2R1, Canada
- Laboratoire d'Ingénierie Moléculaire pour la Séparation et les Applications des Gaz (LIMSAG UMR 5633), Faculté des Sciences Gabriel, 6 Boulevard Gabriel, 21000 Dijon, France
| | - Marc Drouin
- Département de Chimie, Université de Sherbrooke, Sherbrooke, P.Q., J1K 2R1, Canada
| | - Pierre D. Harvey
- Département de Chimie, Université de Sherbrooke, Sherbrooke, P.Q., J1K 2R1, Canada
| | - Claude P. Gros
- Laboratoire d'Ingénierie Moléculaire pour la Séparation et les Applications des Gaz (LIMSAG UMR 5633), Faculté des Sciences Gabriel, 6 Boulevard Gabriel, 21000 Dijon, France
| | - Enrique Espinosa
- Laboratoire d'Ingénierie Moléculaire pour la Séparation et les Applications des Gaz (LIMSAG UMR 5633), Faculté des Sciences Gabriel, 6 Boulevard Gabriel, 21000 Dijon, France
| | - Roger Guilard
- Laboratoire d'Ingénierie Moléculaire pour la Séparation et les Applications des Gaz (LIMSAG UMR 5633), Faculté des Sciences Gabriel, 6 Boulevard Gabriel, 21000 Dijon, France
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Pan QJ, Odoh SO, Schreckenbach G, Arnold PL, Love JB. Theoretical exploration of uranyl complexes of a designed polypyrrolic macrocycle: structure/property effects of hinge size on Pacman-shaped complexes. Dalton Trans 2012; 41:8878-85. [DOI: 10.1039/c2dt31055d] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
- Qing-Jiang Pan
- Key Laboratory of Functional Inorganic Material Chemistry of Education Ministry, School of Chemistry and Materials Science, Heilongjiang University, Harbin, China 150080.
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Brégier F, Aly SM, Gros CP, Barbe JM, Rousselin Y, Harvey PD. Design and Photophysical Properties of Zinc(II) Porphyrin-Containing Dendrons Linked to a Central Artificial Special Pair. Chemistry 2011; 17:14643-62. [DOI: 10.1002/chem.201101832] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2011] [Indexed: 11/09/2022]
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28
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Shrestha S, Gimbert‐Suriñach C, Bhadbhade M, Colbran SB. Four Soft Donors and a Hard Centre: Rhodium Complexes of a Novel Tetrakis(NHC)‐Encapsulated Crown Ether Ligand. Eur J Inorg Chem 2011. [DOI: 10.1002/ejic.201100656] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Sumi Shrestha
- School of Chemistry, University of New South Wales, Sydney, NSW 2052, Australia, Fax: +61‐2‐9385 6141
| | - Carolina Gimbert‐Suriñach
- School of Chemistry, University of New South Wales, Sydney, NSW 2052, Australia, Fax: +61‐2‐9385 6141
| | - Mohan Bhadbhade
- Mark Wainwright Analytical Centre, University of New South Wales, Sydney, NSW 2052, Australia
| | - Stephen B. Colbran
- School of Chemistry, University of New South Wales, Sydney, NSW 2052, Australia, Fax: +61‐2‐9385 6141
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O’Reilly ME, Del Castillo TJ, Falkowski JM, Ramachandran V, Pati M, Correia MC, Abboud KA, Dalal NS, Richardson DE, Veige AS. Autocatalytic O2 Cleavage by an OCO3– Trianionic Pincer CrIII Complex: Isolation and Characterization of the Autocatalytic Intermediate [CrIV]2(μ-O) Dimer. J Am Chem Soc 2011; 133:13661-73. [DOI: 10.1021/ja2050474] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Matthew E. O’Reilly
- Department of Chemistry, Center for Catalysis, University of Florida, P.O. Box 117200, Gainesville, Florida 32611, United States
| | - Trevor J. Del Castillo
- Department of Chemistry, Center for Catalysis, University of Florida, P.O. Box 117200, Gainesville, Florida 32611, United States
| | - Joseph M. Falkowski
- Department of Chemistry, Center for Catalysis, University of Florida, P.O. Box 117200, Gainesville, Florida 32611, United States
| | - Vasanth Ramachandran
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - Mekhala Pati
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - Marie C. Correia
- Department of Chemistry, Center for Catalysis, University of Florida, P.O. Box 117200, Gainesville, Florida 32611, United States
| | - Khalil A. Abboud
- Department of Chemistry, Center for Catalysis, University of Florida, P.O. Box 117200, Gainesville, Florida 32611, United States
| | - Naresh S. Dalal
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - David E. Richardson
- Department of Chemistry, Center for Catalysis, University of Florida, P.O. Box 117200, Gainesville, Florida 32611, United States
| | - Adam S. Veige
- Department of Chemistry, Center for Catalysis, University of Florida, P.O. Box 117200, Gainesville, Florida 32611, United States
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Shook RL, Peterson SM, Greaves J, Moore C, Rheingold AL, Borovik A. Catalytic reduction of dioxygen to water with a monomeric manganese complex at room temperature. J Am Chem Soc 2011; 133:5810-7. [PMID: 21425844 PMCID: PMC3381988 DOI: 10.1021/ja106564a] [Citation(s) in RCA: 120] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
There have been numerous efforts to incorporate dioxygen into chemical processes because of its economic and environmental benefits. The conversion of dioxygen to water is one such example, having importance in both biology and fuel cell technology. Metals or metal complexes are usually necessary to promote this type of reaction and several systems have been reported. However, mechanistic insights into this conversion are still lacking, especially the detection of intermediates. Reported herein is the first example of a monomeric manganese(II) complex that can catalytically convert dioxygen to water. The complex contains a tripodal ligand with two urea groups and one carboxyamidopyridyl unit; this ligand creates an intramolecular hydrogen-bonding network within the secondary coordination sphere that aids in the observed chemistry. The manganese(II) complex is five-coordinate with an N(4)O primary coordination sphere; the oxygen donor comes from the deprotonated carboxyamido moiety. Two key intermediates were detected and characterized: a peroxo-manganese(III) species and a hybrid oxo/hydroxo-manganese(III) species (1). The formulation of 1 was based on spectroscopic and analytical data, including an X-ray diffraction analysis. Reactivity studies showed dioxygen was catalytically converted to water in the presence of reductants, such as diphenylhydrazine and hydrazine. Water was confirmed as a product in greater than 90% yield. A mechanism was proposed that is consistent with the spectroscopy and product distribution, in which the carboxyamido group switches between a coordinated ligand and a basic site to scavenge protons produced during the catalytic cycle. These results highlight the importance of incorporating intramolecular functional groups within the secondary coordination sphere of metal-containing catalysts.
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Affiliation(s)
- Ryan L. Shook
- Department of Chemistry, University of California-Irvine, 1102 Natural Science II, Irvine, CA 92697-2025
| | - Sonja M. Peterson
- Department of Chemistry, University of California-Irvine, 1102 Natural Science II, Irvine, CA 92697-2025
| | - John Greaves
- Department of Chemistry, University of California-Irvine, 1102 Natural Science II, Irvine, CA 92697-2025
| | - Curtis Moore
- Department of Chemistry and Biochemistry, University of California-San Diego, San Diego, 92093-0332
| | - Arnold L. Rheingold
- Department of Chemistry and Biochemistry, University of California-San Diego, San Diego, 92093-0332
| | - A.S. Borovik
- Department of Chemistry, University of California-Irvine, 1102 Natural Science II, Irvine, CA 92697-2025
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31
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Synthesis, structure and photocatalytic activity of a remarkably bent, cofacial ethene-linked diiron (III) μ-oxobisporphyrin. Inorganica Chim Acta 2010. [DOI: 10.1016/j.ica.2010.03.005] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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32
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Vanover E, Huang Y, Xu L, Newcomb M, Zhang R. Photocatalytic aerobic oxidation by a bis-porphyrin-ruthenium(IV) mu-oxo dimer: observation of a putative porphyrin-ruthenium(V)-oxo intermediate. Org Lett 2010; 12:2246-9. [PMID: 20394434 DOI: 10.1021/ol1005938] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The title complexes catalyze the aerobic oxidations of hydrocarbons using visible light and atmospheric oxygen as oxygen source in sequences employing photodisproportionation reactions. The putative oxidants, ruthenium(V)-oxo porphyrin species, can be detected and studied in real time via laser flash photolysis methods.
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Affiliation(s)
- Eric Vanover
- Department of Chemistry, Western Kentucky University, 1906 College Heights Boulevard, Bowling Green, Kentucky 42101, USA
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33
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Pan QJ, Schreckenbach G. Binuclear Hexa- and Pentavalent Uranium Complexes with a Polypyrrolic Ligand: A Density Functional Study of Water- and Hydronium-Induced Reactions. Inorg Chem 2010; 49:6509-17. [DOI: 10.1021/ic100245a] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Qing-Jiang Pan
- Department of Chemistry, University of Manitoba, Winnipeg, MB, Canada R3T 2N2
- Key Laboratory of Functional Inorganic Material Chemistry of Education Ministry and Laboratory of Physical Chemistry, School of Chemistry and Materials Science, Heilongjiang University, Harbin, China 150080
| | - Georg Schreckenbach
- Department of Chemistry, University of Manitoba, Winnipeg, MB, Canada R3T 2N2
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Burnet S, Hall AK, Harrowfield JM, Koutsantonis GA, Sanford V, Sauter D, Skelton BW, White AH. Alkali Metal Complexes of Aromatic Polycarboxylates—a Balance of π-Stacking and Coordinate Bonding Interactions? Supramol Chem 2010. [DOI: 10.1080/1061027031000073045] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Stephen Burnet
- a Department of Chemistry , University of Western Australia , WA, 6009 , Crawley , Australia
| | - Annegret K. Hall
- b Research Centre for Advanced Mineral and Materials Processing , 6009 , Crawley , WA , Australia
| | - Jack M. Harrowfield
- b Research Centre for Advanced Mineral and Materials Processing , 6009 , Crawley , WA , Australia
| | - George A. Koutsantonis
- a Department of Chemistry , University of Western Australia , WA, 6009 , Crawley , Australia
| | - Vanessa Sanford
- a Department of Chemistry , University of Western Australia , WA, 6009 , Crawley , Australia
| | - Daan Sauter
- a Department of Chemistry , University of Western Australia , WA, 6009 , Crawley , Australia
| | - Brian W. Skelton
- a Department of Chemistry , University of Western Australia , WA, 6009 , Crawley , Australia
| | - Allan H. White
- a Department of Chemistry , University of Western Australia , WA, 6009 , Crawley , Australia
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35
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Gewirth AA, Thorum MS. Electroreduction of Dioxygen for Fuel-Cell Applications: Materials and Challenges. Inorg Chem 2010; 49:3557-66. [DOI: 10.1021/ic9022486] [Citation(s) in RCA: 590] [Impact Index Per Article: 42.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Andrew A. Gewirth
- Department of Chemistry, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801
| | - Matthew S. Thorum
- Department of Chemistry, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801
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36
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Pan QJ, Shamov G, Schreckenbach G. Binuclear Uranium(VI) Complexes with a “Pacman” Expanded Porphyrin: Computational Evidence for Highly Unusual Bis-Actinyl Structures. Chemistry 2010; 16:2282-90. [DOI: 10.1002/chem.200902014] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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37
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Partyka DV, Updegraff III JB, Zeller M, Hunter AD, Gray TG. Gold(i) halide complexes of bis(diphenylphosphine)diphenyl ether ligands: a balance of ligand strain and non-covalent interactions. Dalton Trans 2010; 39:5388-97. [DOI: 10.1039/b920717a] [Citation(s) in RCA: 27] [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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38
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Hirotsu M, Ohno N, Nakajima T, Kushibe C, Ueno K, Kinoshita I. Synthesis and characterization of xanthene-bridged Schiff-base dimanganese(iii) complexes: bimetallic catalysts for asymmetric oxidation of sulfides. Dalton Trans 2010:139-48. [DOI: 10.1039/b909491a] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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39
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Fukuzumi S. Roles of Metal Ions in Controlling Bioinspired Electron-Transfer Systems. Metal Ion-Coupled Electron Transfer. PROGRESS IN INORGANIC CHEMISTRY 2009. [DOI: 10.1002/9780470440124.ch2] [Citation(s) in RCA: 73] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
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Berard JJ, Schreckenbach G, Arnold PL, Patel D, Love JB. Computational Density Functional Study of Polypyrrolic Macrocycles: Analysis of Actinyl-Oxo to 3d Transition Metal Bonding. Inorg Chem 2008; 47:11583-92. [DOI: 10.1021/ic8010772] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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SHE Y, FENG L, WANG A, LI X. Synthesis of Substituted μ-Oxo-bis[tetra-phenyl porphyrinatoiron] Compounds from Free Base Porphyrins by a One-pot Method. Chin J Chem Eng 2008. [DOI: 10.1016/s1004-9541(08)60090-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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43
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Betley TA, Wu Q, Van Voorhis T, Nocera DG. Electronic design criteria for O-O bond formation via metal-oxo complexes. Inorg Chem 2008; 47:1849-61. [PMID: 18330975 DOI: 10.1021/ic701972n] [Citation(s) in RCA: 296] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Metal-oxos are critical intermediates for the management of oxygen and its activation. The reactivity of the metal-oxo is central to the formation of O-O bonds, which is the essential step for oxygen generation. Two basic strategies for the formation of O-O bonds at metal-oxo active sites are presented. The acid-base (AB) strategy involves the attack of a nucleophilic oxygen species (e.g., hydroxide) on an electrophilic metal-oxo. Here, active-site designs must incorporate the assembly of a hydroxide (or water) proximate to a high-valent metal-oxo of even d electron count. For the radical coupling (RC) strategy, two high-valent metal-oxos of an odd d electron count are needed to drive O-O coupling. This Forum Article focuses on the different electronic structures of terminal metal-oxos that support AB and RC strategies and the design of ligand scaffolds that engender these electronic structures.
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Affiliation(s)
- Theodore A Betley
- Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, Cambridge, Massachusetts 02138, USA
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Rosenthal J, Nocera DG. Oxygen Activation Chemistry of Pacman and Hangman Porphyrin Architectures Based on Xanthene and Dibenzofuran Spacers. PROGRESS IN INORGANIC CHEMISTRY 2008. [DOI: 10.1002/9780470144428.ch7] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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Betley TA, Surendranath Y, Childress MV, Alliger GE, Fu R, Cummins CC, Nocera DG. A ligand field chemistry of oxygen generation by the oxygen-evolving complex and synthetic active sites. Philos Trans R Soc Lond B Biol Sci 2008; 363:1293-303; discussion 1303. [PMID: 17971328 PMCID: PMC2614088 DOI: 10.1098/rstb.2007.2226] [Citation(s) in RCA: 71] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Oxygen-oxygen bond formation and O2 generation occur from the S4 state of the oxygen-evolving complex (OEC). Several mechanistic possibilities have been proposed for water oxidation, depending on the formal oxidation state of the Mn atoms. All fall under two general classifications: the AB mechanism in which nucleophilic oxygen (base, B) attacks electrophilic oxygen (acid, A) of the Mn4Ca cluster or the RC mechanism in which radical-like oxygen species couple within OEC. The critical intermediate in either mechanism involves a metal oxo, though the nature of this oxo for AB and RC mechanisms is disparate. In the case of the AB mechanism, assembly of an even-electron count, high-valent metal-oxo proximate to a hydroxide is needed whereas, in an RC mechanism, two odd-electron count, high-valent metal oxos are required. Thus the two mechanisms give rise to very different design criteria for functional models of the OEC active site. This discussion presents the electron counts and ligand geometries that support metal oxos for AB and RC O-O bond-forming reactions. The construction of architectures that bring two oxygen functionalities together under the purview of the AB and RC scenarios are described.
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Affiliation(s)
| | | | | | | | | | | | - Daniel G Nocera
- Department of Chemistry, Massachusetts Institute of Technology77 Massachusetts Avenue, 6-335, Cambridge, MA 02139-4307, USA
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Abstract
The selective reduction of oxygen to water requires four electrons and four protons. The design of catalysts that promote oxygen reduction therefore requires the management of both electron and proton inventories. Pacman and Hangman porphyrins provide a cleft for oxygen binding, a redox shuttle for oxygen reduction, and functionality for tuning the acid-base properties of bound oxygen and its intermediates. With proper control of the proton-coupled electron transfer events, O-O bond breaking of oxygen, and more generally oxygenated substrates, may be achieved with high efficiencies. The rule set developed for oxygen reduction may be applied to a variety of other small molecule activation reactions of consequence to energy conversion.
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Affiliation(s)
- Joel Rosenthal
- Department of Chemistry, 6-335, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139-4307, USA
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47
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Givaja G, Volpe M, Leeland JW, Edwards MA, Young TK, Darby SB, Reid SD, Blake AJ, Wilson C, Wolowska J, McInnes EJL, Schröder M, Love JB. Design and Synthesis of Binucleating Macrocyclic Clefts Derived from Schiff-Base Calixpyrroles. Chemistry 2007; 13:3707-23. [PMID: 17245783 DOI: 10.1002/chem.200600989] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
The syntheses, characterisation and complexation reactions of a series of binucleating Schiff-base calixpyrrole macrocycles are described. The acid-templated [2+2] condensations between meso-disubstituted diformyldipyrromethanes and o-phenylenediamines generate the Schiff-base pyrrolic macrocycles H(4)L(1) to H(4)L(6) upon basic workup. The single-crystal X-ray structures of both H(4)L(3).2 EtOH and H(4)L(6).H2O confirm that [2+2] cyclisation has occurred, with either EtOH or H2O hydrogen-bonded within the macrocyclic cleft. A series of complexation reactions generate the dipalladium [Pd2(L)] (L=L(1) to L(5)), dinickel [Ni2(L(1))] and dicopper [Cu2(L)] (L=L(1) to L(3)) complexes. All of these complexes have been structurally characterised in the solid state and are found to adopt wedged structures that are enforced by the rigidity of the aryl backbone to give a cleft reminiscent of the structures of Pacman porphyrins. The binuclear nickel complexes [Ni2(mu-OMe)2Cl2(HOMe)2(H(4)L(1))] and [Ni2(mu-OH)2Cl2(HOMe)(H(4)L(5))] have also been prepared, although in these cases the solid-state structures show that the macrocyclic ligand remains protonated at the pyrrolic nitrogen atoms, and the Ni(II) cations are therefore co-ordinated by the imine nitrogen atoms only to give an open conformation for the complex. The dicopper complex [Cu2(L(3))] was crystallised in the presence of pyridine to form the adduct [Cu2(py)(L(3))], in which, in the solid state, the pyridine ligand is bound within the binuclear molecular cleft. Reaction between H(4)L(1) and [Mn(thf){N(SiMe(3))2}2] results in clean formation of the dimanganese complex [Mn2(L(1))], which, upon crystallisation, formed the mixed-valent complex [Mn2(mu-OH)(L(1))] in which the hydroxo ligand bridges the metal centres within the molecular cleft.
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Affiliation(s)
- Gonzalo Givaja
- School of Chemistry, University of Nottingham, University Park, Nottingham, NG7 2RD, UK
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Abstract
[structure: see text] The synthesis of a Pacman heterobisporphyrin associating an octaethyl porphyrinatozinc (ZnOEP) energy donor and a triaryl porphyrinatozinc (ZntPP) energy acceptor around a calix[4]arene spacer is described. Contrary to previous symmetrical architectures, correlations between the chromophores in the unsymmetrical calixarene bisporphyrin Pacman scaffold can now be observed in ROESY experiments. Independent of the excitation wavelength, only the luminescence of the ZntPP moiety was observed corresponding to quenching of the OEP moiety's emission.
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Affiliation(s)
- Grégory Pognon
- CLAC, Institut de Chimie, UMR 7177 CNRS-ULP, BP 1032, 4 rue Blaise Pascal, 67070 Strasbourg, France
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Harvey PD, Stern C, Gros CP, Guilard R. The photophysics and photochemistry of cofacial free base and metallated bisporphyrins held together by covalent architectures. Coord Chem Rev 2007. [DOI: 10.1016/j.ccr.2006.06.009] [Citation(s) in RCA: 117] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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MURATA H, IAI Y, OTAKE T, OYAIZU K, KOZAWA K, YUASA M. Synthesis of Cobalt Complex Using Pyrrole Derivative with Basic Ligand and Application to Cathodic Catalyst for Oxygen Reduction. ELECTROCHEMISTRY 2007. [DOI: 10.5796/electrochemistry.75.964] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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