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Guerrero I, Viñas C, Teixidor F, Romero I. Unveiling Non-Covalent Interactions in Novel Cooperative Photoredox Systems for Efficient Alkene Oxidation in Water. Molecules 2024; 29:2378. [PMID: 38792238 PMCID: PMC11123843 DOI: 10.3390/molecules29102378] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2024] [Revised: 05/13/2024] [Accepted: 05/15/2024] [Indexed: 05/26/2024] Open
Abstract
A new cooperative photoredox catalytic system, [RuII(trpy)(bpy)(H2O)][3,3'-Co(8,9,12-Cl3-1,2-C2B9H8)2]2, 5, has been synthesized and fully characterized for the first time. In this system, the photoredox catalyst [3,3'-Co(8,9,12-Cl3-1,2-C2B9H8)2]-[Cl6-1]-, a metallacarborane, and the oxidation catalyst [RuII(trpy)(bpy)(H2O)]2+, 2 are linked by non-covalent interactions. This compound, along with the one previously synthesized by us, [RuII(trpy)(bpy)(H2O)][(3,3'-Co(1,2-C2B9H11)2]2, 4, are the only examples of cooperative molecular photocatalysts in which the catalyst and photosensitizer are not linked by covalent bonds. Both cooperative systems have proven to be efficient photocatalysts for the oxidation of alkenes in water through Proton Coupled Electron Transfer processes (PCETs). Using 0.05 mol% of catalyst 4, total conversion values were achieved after 15 min with moderate selectivity for the corresponding epoxides, which decreases with reaction time, along with the TON values. However, with 0.005 mol% of catalyst, the conversion values are lower, but the selectivity and TON values are higher. This occurs simultaneously with an increase in the amount of the corresponding diol for most of the substrates studied. Photocatalyst 4 acts as a photocatalyst in both the epoxidation of alkenes and their hydroxylation in aqueous medium. The hybrid system 5 shows generally higher conversion values at low loads compared to those obtained with 4 for most of the substrates studied. However, the selectivity values for the corresponding epoxides are lower even after 15 min of reaction. This is likely due to the enhanced oxidizing capacity of CoIV in catalyst 5, resulting from the presence of more electron-withdrawing substituents on the metallacarborane platform.
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Affiliation(s)
- Isabel Guerrero
- Institut de Ciencia de Materials de Barcelona (ICMAB-CSIC), Campus UAB, E-08193 Bellaterra, Spain; (I.G.); (C.V.)
| | - Clara Viñas
- Institut de Ciencia de Materials de Barcelona (ICMAB-CSIC), Campus UAB, E-08193 Bellaterra, Spain; (I.G.); (C.V.)
| | - Francesc Teixidor
- Institut de Ciencia de Materials de Barcelona (ICMAB-CSIC), Campus UAB, E-08193 Bellaterra, Spain; (I.G.); (C.V.)
| | - Isabel Romero
- Departament de Química and Serveis Tècnics de Recerca, Universitat de Girona, C/M. Aurèlia Campmany, 69, E-17003 Girona, Spain
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2
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Affès S, Stamatelou AM, Fontrodona X, Kabadou A, Viñas C, Teixidor F, Romero I. Enhancing Photoredox Catalysis in Aqueous Environments: Ruthenium Aqua Complex Derivatization of Graphene Oxide and Graphite Rods for Efficient Visible-Light-Driven Hybrid Catalysts. ACS APPLIED MATERIALS & INTERFACES 2024; 16:507-519. [PMID: 38114421 PMCID: PMC10788860 DOI: 10.1021/acsami.3c13156] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2023] [Revised: 11/07/2023] [Accepted: 12/07/2023] [Indexed: 12/21/2023]
Abstract
A ruthenium aqua photoredox catalyst has been successfully heterogeneneized on graphene oxide (GO@trans-fac-3) and graphite rods (GR@trans-fac-3) for the first time and have proven to be sustainable and easily reusable systems for the photooxidation of alcohols in water, in mild and green conditions. We report here the synthesis and total characterization of two Ru(II)-polypyridyl complexes, the chlorido trans-fac-[RuCl(bpea-pyrene)(bpy)](PF6) (trans-fac-2) and the aqua trans-fac-[Ru(bpea-pyrene)(bpy)OH2](PF6)2 (trans-fac-3), both containing the N-tridentate, 1-[bis(pyridine-2-ylmethyl)amino]methylpyrene (bpea-pyrene), and 2,2'-bipyridine (bpy) ligands. In both complexes, only a single isomer, the trans-fac, has been detected in solution and in the solid state. The aqua complex trans-fac-3 displays bielectronic redox processes in water, assigned to the Ru(IV/II) couple. The trans-fac-3 complex has been heterogenized on different types of supports, (i) on graphene oxide (GO) through π-stacking interactions between the pyrene group of the bpea-pyrene ligand and the GO and (ii) both on glassy carbon electrodes (GC) and on graphite rods (GR) through oxidative electropolymerization of the pyrene group, which yield stable heterogeneous photoredox catalysts. GO@trans-fac-3- and GR/poly trans-fac-3-modified electrodes were fully characterized by spectroscopic and electrochemical methods. Trans-fac-3 and GO@trans-fac-3 photocatalysts (without a photosensitizer) showed good catalytic efficiency in the photooxidation of alcohols in water under mild conditions and using visible light. Both photocatalysts display high selectivity values (>99%) even for primary alcohols in accordance with the presence of two-electron transfer processes (2e-/2H+). GO@trans-fac-3 keeps intact its homogeneous catalytic properties but shows an enhancement in yields. GO@trans-fac-3 can be easily recycled by filtration and reused for up to five runs without any significant loss of catalytic activity. Graphite rods (GR@trans-fac-3) were also evaluated as heterogeneous photoredox catalysts showing high turnover numbers (TON) and selectivity values.
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Affiliation(s)
- Syrine Affès
- Departament
de Química and Serveis Tècnics de Recerca, Universitat de Girona, C/M. Aurèlia Campmany, 69, Girona E-17003, Spain
- Laboratoire
des Sciences des Matériaux et d’Environnement, Faculté
des Sciences, Université de Sfax, Sfax 3000, Tunisie
| | - Akrivi-Maria Stamatelou
- Departament
de Química and Serveis Tècnics de Recerca, Universitat de Girona, C/M. Aurèlia Campmany, 69, Girona E-17003, Spain
| | - Xavier Fontrodona
- Departament
de Química and Serveis Tècnics de Recerca, Universitat de Girona, C/M. Aurèlia Campmany, 69, Girona E-17003, Spain
| | - Ahlem Kabadou
- Laboratoire
des Sciences des Matériaux et d’Environnement, Faculté
des Sciences, Université de Sfax, Sfax 3000, Tunisie
| | - Clara Viñas
- Institut
de Ciencia de Materials de Barcelona, ICMAB-CSIC, Campus UAB, Bellaterra E-08193, Spain
| | - Francesc Teixidor
- Institut
de Ciencia de Materials de Barcelona, ICMAB-CSIC, Campus UAB, Bellaterra E-08193, Spain
| | - Isabel Romero
- Departament
de Química and Serveis Tècnics de Recerca, Universitat de Girona, C/M. Aurèlia Campmany, 69, Girona E-17003, Spain
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3
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Clerich E, Affès S, Anticó E, Fontrodona X, Teixidor F, Romero I. Molecular and supported ruthenium complexes as photoredox oxidation catalysts in water. Inorg Chem Front 2022. [DOI: 10.1039/d2qi01504h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A molecular Ru-OH2 complex supported on rGO through non-covalent interactions performs as a photoredox oxidation catalyst in water, without an additional photosensitizer.
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Affiliation(s)
- Enric Clerich
- Departament de Química and Serveis Tècnics de Recerca, Universitat de Girona, C/M. Aurèlia Campmany, 69, E-17003 Girona, Spain
| | - Syrine Affès
- Departament de Química and Serveis Tècnics de Recerca, Universitat de Girona, C/M. Aurèlia Campmany, 69, E-17003 Girona, Spain
| | - Enriqueta Anticó
- Departament de Química and Serveis Tècnics de Recerca, Universitat de Girona, C/M. Aurèlia Campmany, 69, E-17003 Girona, Spain
| | - Xavier Fontrodona
- Departament de Química and Serveis Tècnics de Recerca, Universitat de Girona, C/M. Aurèlia Campmany, 69, E-17003 Girona, Spain
| | - Francesc Teixidor
- Institut de Ciencia de Materials de Barcelona, ICMAB-CSIC, Campus UAB, E-08193 Bellaterra, Spain
| | - Isabel Romero
- Departament de Química and Serveis Tècnics de Recerca, Universitat de Girona, C/M. Aurèlia Campmany, 69, E-17003 Girona, Spain
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4
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Guerrero I, Viñas C, Fontrodona X, Romero I, Teixidor F. Aqueous Persistent Noncovalent Ion-Pair Cooperative Coupling in a Ruthenium Cobaltabis(dicarbollide) System as a Highly Efficient Photoredox Oxidation Catalyst. Inorg Chem 2021; 60:8898-8907. [PMID: 34096276 PMCID: PMC8485323 DOI: 10.1021/acs.inorgchem.1c00751] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
An original cooperative photoredox catalytic system, [RuII(trpy)(bpy)(H2O)][3,3'-Co(1,2-C2B9H11)2]2 (C4; trpy = terpyridine and bpy = bipyridine), has been synthesized. In this system, the photoredox metallacarborane catalyst [3,3'-Co(1,2-C2B9H11)2]- ([1]-) and the oxidation catalyst [RuII(trpy)(bpy)(H2O)]2+ (C2') are linked by noncovalent interactions and not through covalent bonds. The noncovalent interactions to a large degree persist even after water dissolution. This represents a step ahead in cooperativity avoiding costly covalent bonding. Recrystallization of C4 in acetonitrile leads to the substitution of water by the acetonitrile ligand and the formation of complex [RuII(trpy)(bpy)(CH3CN)][3,3'-Co(1,2-C2B9H11)2]2 (C5), structurally characterized. A significant electronic coupling between C2' and [1]- was first sensed in electrochemical studies in water. The CoIV/III redox couple in water differed by 170 mV when [1]- had Na+ as a cation versus when the ruthenium complex was the cation. This cooperative system leads to an efficient catalyst for the photooxidation of alcohols in water, through a proton-coupled electron-transfer process. We have highlighted the capacity of C4 to perform as an excellent cooperative photoredox catalyst in the photooxidation of alcohols in water at room temperature under UV irradiation, using 0.005 mol % catalyst. A high turnover number (TON = 20000) has been observed. The hybrid system C4 displays a better catalytic performance than the separated mixtures of C2' and Na[1], with the same concentrations and ratios of Ru/Co, proving the history relevance of the photocatalyst. Cooperative systems with this type of interaction have not been described and represent a step forward in getting cooperativity avoiding costly covalent bonding. A possible mechanism has been proposed.
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Affiliation(s)
- Isabel Guerrero
- Institut de Ciencia de Materials de Barcelona, Consejo Superior de Investigaciones Científicas, Campus UAB, E-08193 Bellaterra, Spain.,Departament de Química and Serveis Tècnics de Recerca, Universitat de Girona, c/m Aurèlia Campmany 69, E-17003 Girona, Spain
| | - Clara Viñas
- Institut de Ciencia de Materials de Barcelona, Consejo Superior de Investigaciones Científicas, Campus UAB, E-08193 Bellaterra, Spain
| | - Xavier Fontrodona
- Departament de Química and Serveis Tècnics de Recerca, Universitat de Girona, c/m Aurèlia Campmany 69, E-17003 Girona, Spain
| | - Isabel Romero
- Departament de Química and Serveis Tècnics de Recerca, Universitat de Girona, c/m Aurèlia Campmany 69, E-17003 Girona, Spain
| | - Francesc Teixidor
- Institut de Ciencia de Materials de Barcelona, Consejo Superior de Investigaciones Científicas, Campus UAB, E-08193 Bellaterra, Spain
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5
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Tsang C, Lee LYS, Cheung K, Chan P, Wong W, Wong K. Unexpected Promotional Effects of Alkyl‐Tailed Ligands and Anions on the Electrochemical Generation of Ruthenium(IV)‐Oxo Complexes. ChemElectroChem 2021. [DOI: 10.1002/celc.202100364] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Chui‐Shan Tsang
- State Key Laboratory of Chemical Biology and Drug Discovery and Department of Applied Biology and Chemical Technology The Hong Kong Polytechnic University Hung Hom, Kowloon Hong Kong SAR China
| | - Lawrence Yoon Suk Lee
- State Key Laboratory of Chemical Biology and Drug Discovery and Department of Applied Biology and Chemical Technology The Hong Kong Polytechnic University Hung Hom, Kowloon Hong Kong SAR China
| | - Kwong‐Chak Cheung
- State Key Laboratory of Chemical Biology and Drug Discovery and Department of Applied Biology and Chemical Technology The Hong Kong Polytechnic University Hung Hom, Kowloon Hong Kong SAR China
| | - Pak‐Ho Chan
- State Key Laboratory of Chemical Biology and Drug Discovery and Department of Applied Biology and Chemical Technology The Hong Kong Polytechnic University Hung Hom, Kowloon Hong Kong SAR China
| | - Wing‐Leung Wong
- State Key Laboratory of Chemical Biology and Drug Discovery and Department of Applied Biology and Chemical Technology The Hong Kong Polytechnic University Hung Hom, Kowloon Hong Kong SAR China
| | - Kwok‐Yin Wong
- State Key Laboratory of Chemical Biology and Drug Discovery and Department of Applied Biology and Chemical Technology The Hong Kong Polytechnic University Hung Hom, Kowloon Hong Kong SAR China
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6
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Chen JM, Peng L, Zhou FF, Liu B, Hou C, Li JW, Huang Z, Kurmoo M, Zeng MH. A Domino Fusion of an Organic Ligand Depended on Metal-Induced and Oxygen Insertion, Unraveled by Crystallography, Mass Spectrometry, and DFT Calculations. Chemistry 2021; 27:2875-2881. [PMID: 33231936 DOI: 10.1002/chem.202004396] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Revised: 11/17/2020] [Indexed: 11/08/2022]
Abstract
Herein, the reaction of (1-methyl-1 H-benzo[d]imidazol-2-yl)methanamine (L1) with Co(H2 O)6 Cl2 , in CH3 CN at 120 °C, leading to the 2,3,5,6-tetrakis(1-methyl-1 H-benzo[d]imidazol-2-yl)pyrazine (3), isolated as a dimeric cluster {[CoII 2 (3)Cl4 ]⋅2 CH3 CN} (2), is reported. When O2 and H2 O are present, (1-methyl-1 H-benzo[d]imidazole-2-carbonyl)amide (HL1') is first formed and crystallized as [CoIII (L1)2 (L1')]Cl2 ⋅2 H2 O (4) before fusion of HL1' with L1, giving 1-methyl-N-(1-methyl-1 H-benzo[d]imidazol-2-carbonyl)-1 H-benzo[d]imidazol-2-carboxamide (HL2'') forming a one-dimensional (1D) chain of [CoII 3 (L2'')2 Cl4 ]n (5). The combination of crystallography and mass spectrometry (ESI-MS) of isolated crystals and the solutions taken from the reaction as a function time reveal seven intermediate steps leading to 2, but six steps for 5, for which a different sequence takes place. Control and isotope labeling experiments confirm the two carbonyl oxygen atoms in 5 originate from both air and water. The dependence on the metals, compared with FeCl3 ⋅6 H2 O leading to a stable triheteroarylmethyl radical, is quite astounding, which could be attributed to the different oxidation states of the metals and coordination modes confirmed by DFT calculations. This metal and valence dependent process is a very useful way for selectively obtaining these large molecules, which are unachievable by common organic synthesis.
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Affiliation(s)
- Jin-Ming Chen
- Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin, 541004, P.R. China.,Hubei Collaborative Innovation Center for Advanced Chemical Materials, Ministry of Education Key Laboratory for the Synthesis, Application of Organic Functional Molecules, College of Chemistry and Chemical Engineering, Hubei University, Wuhan, 430062, P.R. China
| | - Liang Peng
- Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin, 541004, P.R. China
| | - Fu-Fang Zhou
- Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin, 541004, P.R. China
| | - Bin Liu
- Hubei Collaborative Innovation Center for Advanced Chemical Materials, Ministry of Education Key Laboratory for the Synthesis, Application of Organic Functional Molecules, College of Chemistry and Chemical Engineering, Hubei University, Wuhan, 430062, P.R. China
| | - Cheng Hou
- Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin, 541004, P.R. China.,College of Chemistry and Bioengineering, Guilin University of Technology, Guilin, 541004, P.R. China
| | - Jia-Wei Li
- Hubei Collaborative Innovation Center for Advanced Chemical Materials, Ministry of Education Key Laboratory for the Synthesis, Application of Organic Functional Molecules, College of Chemistry and Chemical Engineering, Hubei University, Wuhan, 430062, P.R. China
| | - Zhou Huang
- Hubei Collaborative Innovation Center for Advanced Chemical Materials, Ministry of Education Key Laboratory for the Synthesis, Application of Organic Functional Molecules, College of Chemistry and Chemical Engineering, Hubei University, Wuhan, 430062, P.R. China
| | - Mohamedally Kurmoo
- Institut de Chimie de Strasbourg, CNRS-UMR7177, Université de Strasbourg, 4 rue Blaise Pascal, Strasbourg, 67070, France
| | - Ming-Hua Zeng
- Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin, 541004, P.R. China.,Hubei Collaborative Innovation Center for Advanced Chemical Materials, Ministry of Education Key Laboratory for the Synthesis, Application of Organic Functional Molecules, College of Chemistry and Chemical Engineering, Hubei University, Wuhan, 430062, P.R. China
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7
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Guerrero I, Kelemen Z, Viñas C, Romero I, Teixidor F. Metallacarboranes as Photoredox Catalysts in Water. Chemistry 2020; 26:5027-5036. [PMID: 31999000 DOI: 10.1002/chem.201905395] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2019] [Revised: 01/22/2020] [Indexed: 12/18/2022]
Abstract
Metallacarboranes with the shape of the Greek letter θ, such as [Co(C2 B9 H11 )2 ]- , were tested, for the first time, as efficient photoredox catalysts in the oxidation of aromatic and aliphatic alcohols in water. Their efficiency is linked to their high solubility in water, their high oxidizing power (Co4+/3+ ), and their absence of fluorescence on excitation, among others. In most of the studied examples, using a catalyst load of 0.4 mol % gave high yields of 90-95 % with selectivity greater than 99 %. By reducing the catalyst load to 0.01 mol %, quantitative conversion of reactants to products was achieved, in some cases with greater than 99 % yield, high catalyst efficiency reaching a turnover number of 10 000, and a higher yield with a 45 times lower concentration of catalyst. The metallacarboranes can be recovered easily by precipitation on addition of [NMe4 ]Cl. A pathway for the photoredox-catalyzed oxidation of alcohols is proposed.
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Affiliation(s)
- Isabel Guerrero
- Institut de Ciencia de Materials de Barcelona, ICMAB-CSIC, Campus UAB, 08193, Bellaterra, Spain.,Departament de Química and Serveis Tècnics de Recerca, Universitat de Girona, C/ M. Aurèlia Campmany, 69, 17003, Girona, Spain
| | - Zsolt Kelemen
- Institut de Ciencia de Materials de Barcelona, ICMAB-CSIC, Campus UAB, 08193, Bellaterra, Spain
| | - Clara Viñas
- Institut de Ciencia de Materials de Barcelona, ICMAB-CSIC, Campus UAB, 08193, Bellaterra, Spain
| | - Isabel Romero
- Departament de Química and Serveis Tècnics de Recerca, Universitat de Girona, C/ M. Aurèlia Campmany, 69, 17003, Girona, Spain
| | - Francesc Teixidor
- Institut de Ciencia de Materials de Barcelona, ICMAB-CSIC, Campus UAB, 08193, Bellaterra, Spain
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de Palo A, La Ganga G, Nastasi F, Guelfi M, Bortoluzzi M, Pampaloni G, Puntoriero F, Campagna S, Marchetti F. Ru(ii) water oxidation catalysts with 2,3-bis(2-pyridyl)pyrazine and tris(pyrazolyl)methane ligands: assembly of photo-active and catalytically active subunits in a dinuclear structure. Dalton Trans 2020; 49:3341-3352. [PMID: 32103210 DOI: 10.1039/c9dt04815d] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two mononuclear Ru(ii) complexes, i.e. [RuCl(κ3N-terpy)(κ2N-dpp)]PF6 ([1]PF6; terpy = 2,2':6',2''-terpyridine; dpp = 2,3-bis(2'-pyridyl-pyrazine) and [RuCl(κ3N-tpm)(κ2N-dpp)]Cl ([2]Cl; tpm = tris(1-pyrazolyl)methane), and one dinuclear complex, i.e. [Ru2Cl(κ3N-tpm)(μ-κ2N:κ2N-dpp)Ru(κ2N-bpy)2][PF6]3 ([3][PF6]3; bpy = 2,2'-bipyridine), have been synthesized and their water oxidation catalytic properties have been investigated. A combined DFT and experimental (35Cl NMR and conductivity measurements) study aimed to elucidate the nature of [1]+ and [2]+ in aqueous solution has also been performed, indicating that one water molecule is allowed to enter the first coordination sphere of [2]+ in the ground state, replacing one tpm nitrogen. Conversely, in the case of [1]+, water coordination, assumed to be needed for the water oxidation process, presumably occurs following the oxidation of the metal. For all complexes, a catalytic wave has been detected in acetonitrile/water 1 : 1 (v/v) solution in the range 1.4-1.7 V vs. SCE. In all cases, water oxidation (investigated at pH < 8) takes place initially via a proton-coupled two-electron, two-proton process with the formation of an Ru(iv)[double bond, length as m-dash]O moiety, followed by one electron oxidation and water nucleophilic attack. The TON and TOF values (within the range of 16-33 and 1.3-2.2 h-1, respectively) of the complexes are higher than those of the benchmark [Ru(LLL)(LL)(OH2)]2+-type species (LLL and LL are tridentate and bidentate polypyridine ligands, respectively), which is [Ru(terpy)(bpm)(OH2)]2+.
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Affiliation(s)
- Alice de Palo
- Università di Pisa, Dipartimento di Chimica e Chimica Industriale, Via G. Moruzzi 13, I-56124 Pisa, Italy.
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9
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Mühldorf B, Lennert U, Wolf R. Coupling photoredox and biomimetic catalysis for the visible-light-driven oxygenation of organic compounds. PHYSICAL SCIENCES REVIEWS 2019. [DOI: 10.1515/psr-2018-0030] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Abstract
Recent advances in the development of coupled photoredox systems for the oxygenation of organic compounds are reviewed.
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10
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Matias TA, Rein FN, Rocha RC, Formiga ALB, Toma HE, Araki K. Effects of a strong π-accepting ancillary ligand on the water oxidation activity of weakly coupled binuclear ruthenium catalysts. Dalton Trans 2019; 48:3009-3017. [PMID: 30747931 DOI: 10.1039/c8dt04963g] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Significant differences were found in the proton-coupled redox chemistry and catalytic behavior of the binuclear [{Ru(H2O)(bpz)}2(tpy2ph)](PF6)4 complex [bpz = 2,2'-bipyrazine; tpy2ph = 1,3-bis(4'-2,2':6',2''-terpyridin-4-yl)benzene] as compared with the structurally analogous derivative with 2,2'-bipyridine (bpy) instead of bpz. The differences were assigned to the stronger π-accepting character of bpz relative to bpy as the ancillary ligand. The expectation of a positive shift for the Ru-centered redox potentials was confirmed for the lower oxidation state species, but that trend was reversed in the formation of the high-valence catalytic active species as shown by a negative shift of 0.14 V for the potential of the [RuIV/V[double bond, length as m-dash]O] process. Moreover, DFT calculations indicated a significant decrease of about 15% on the spin density and oxyl character of the [RuV[double bond, length as m-dash]O]3+ fragment. The significantly lower kcat(O2) for the bpz system was attributed to these combined electronic effects.
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Affiliation(s)
- Tiago A Matias
- Department of Chemistry, Institute of Chemistry, University of São Paulo, Av. Lineu Prestes 748, São Paulo, SP 05508-000, Brazil.
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11
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Hennessey S, Farràs P, Benet-Buchholz J, Llobet A. A Bpp-based dinuclear ruthenium photocatalyst for visible light-driven oxidation reactions. Catal Sci Technol 2019. [DOI: 10.1039/c9cy01796h] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The photocatalytic oxidation of organic substrates in water using a diruthenium chromophore-catalyst dyad molecule can be tuned by the nature of the bridging ligand.
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Affiliation(s)
- Seán Hennessey
- School of Chemistry
- Energy Research Centre
- Ryan Institute
- National University of Ireland
- H91 CF50 Galway
| | - Pau Farràs
- School of Chemistry
- Energy Research Centre
- Ryan Institute
- National University of Ireland
- H91 CF50 Galway
| | | | - Antoni Llobet
- Institute of Chemical Research of Catalonia (ICIQ)
- 43007 Tarragona
- Spain
- Departament de Química
- Universidad Autònoma de Barcelona
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12
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Ha-Thi MH, Pham VT, Pino T, Maslova V, Quaranta A, Lefumeux C, Leibl W, Aukauloo A. Photoinduced electron transfer in a molecular dyad by nanosecond pump-pump-probe spectroscopy. Photochem Photobiol Sci 2018; 17:903-909. [PMID: 29855023 DOI: 10.1039/c8pp00048d] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The design of robust and inexpensive molecular photocatalysts for the conversion of abundant stable molecules like H2O and CO2 into an energetic carrier is one of the major fundamental questions for scientists nowadays. The outstanding challenge is to couple single photoinduced charge separation events with the sequential accumulation of redox equivalents at the catalytic unit for performing multielectronic catalytic reactions. Herein, double excitation by nanosecond pump-pump-probe experiments was used to interrogate the photoinduced charge transfer and charge accumulation on a molecular dyad composed of a porphyrin chromophore and a ruthenium-based catalyst in the presence of a reversible electron acceptor. An accumulative charge transfer state is unattainable because of rapid reverse electron transfer to the photosensitizer upon the second excitation and the low driving force of the forward photodriven electron transfer reaction. Such a method allows the fundamental understanding of the relaxation mechanism after two sequential photon absorptions, deciphering the undesired electron transfer reactions that limit the charge accumulation efficiency. This study is a step toward the improvement of synthetic strategies of molecular photocatalysts for light-induced charge accumulation and more generally, for solar energy conversion.
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Affiliation(s)
- M-H Ha-Thi
- Institut des Sciences Moléculaires d'Orsay (ISMO), CNRS, Univ. Paris-Sud, Université Paris-Saclay, F-91405 Orsay, France.
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13
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Ypsilantis K, Plakatouras JC, Manos MJ, Kourtellaris A, Markopoulos G, Kolettas E, Garoufis A. Stepwise synthesis, characterization, DNA binding properties and cytotoxicity of diruthenium oligopyridine compounds conjugated with peptides. Dalton Trans 2018; 47:3549-3567. [PMID: 29436543 DOI: 10.1039/c7dt04639a] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Although the interactions of oligopyridine ruthenium complexes with DNA have been widely studied, the biological activity of similar diruthenium oligopyridine complexes conjugated with peptides has not been investigated. Herein, we report the stepwise synthesis and characterization of diruthenium complexes with the general formula [(La)Ru(tppz)Ru(Lb)]n+ (tppz = 2,3,5,6-tetra(2-pyridyl)pyrazine, La = 2,2':6',2''-terpyridine or 4-phenyl-2,2':6',2''-terpyridine and Lb = 2,2':6',2''-terpyridine-4'-CO(Gly1-Gly2-Gly3-LysCONH2) (5), (6), n = 5; 2,2':6',2''-terpyridine-4'-CO(Gly1-Gly2-Lys1-Lys2CONH2) (7), (8), n = 6; 2,2':6',2''-terpyridine-4'-CO(Ahx-Lys1Lys2CONH2) (9), (10), n = 5, Ahx = 6-aminohexanoic acid). The compounds [(trpy)Ru(tppz)Ru(trpy-CO2H)](PF6)4, (2)(PF6)4, [(ptrpy)Ru(tppz)Ru(trpy-CO2H)](PF6)4, (3)(PF6)4 and [(ptrpy)Ru(tppz)Ru(trpy)](PF6)4, (4)(PF6)4 were also characterized by single crystal X-ray methods. Moreover, the interactions of the chloride salts (5), (6) and (4) with the self-complementary dodecanucleotide duplex d(5'-CGCGAATTCGCG-3')2 were studied by NMR spectroscopic techniques. The results show that complex (4) binds in the central part of the oligonucleotide, from the minor groove through the ligand ptrpy, while the ligand trpy, which was located on the other side of the diruthenium core, does not contribute to the binding. Complex (5) binds similarly, through the ligand ptrpy. However, the induced upfield shifts of the ptrpy proton signals are significantly lower than the corresponding ones in the case of (4), indicating much lower binding affinity. This is clear evidence that the tethered peptide Gly1-Gly2-Gly3-Lys1CONH2 hinders the complex binding, even though it contains groups that are able to assist it (e.g., the positively charged amino group of lysine, the peptidic backbone, the terminal amide). Complex (6) shows a non-specific binding, interacting through electrostatic forces. The chloride salts of (4), (5) and (6) had insignificant effects on the cell cycle distribution and marginal cytotoxicity (IC50 > 750 μM) against human lung cancer cell lines H1299 and H1437, indicating that their binding to the oligonucleotide is not a sufficient condition for their cytotoxicity.
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Affiliation(s)
- Konstantinos Ypsilantis
- Laboratory of Inorganic Chemistry, Department of Chemistry, University of Ioannina, Ioannina 45110, Greece.
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14
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Matias TA, Mangoni AP, Toma SH, Rein FN, Rocha RC, Toma HE, Araki K. Catalytic Water-Oxidation Activity of a Weakly Coupled Binuclear Ruthenium Polypyridyl Complex. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201600889] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Tiago A. Matias
- Department of Chemistry; Institute of Chemistry; University of São Paulo; Av. Lineu Prestes 748 SP 05508-000 Butantã São Paulo Brazil
| | - Ana P. Mangoni
- Department of Chemistry; Institute of Chemistry; University of São Paulo; Av. Lineu Prestes 748 SP 05508-000 Butantã São Paulo Brazil
| | - Sergio H. Toma
- Department of Chemistry; Institute of Chemistry; University of São Paulo; Av. Lineu Prestes 748 SP 05508-000 Butantã São Paulo Brazil
| | | | | | - Henrique E. Toma
- Department of Chemistry; Institute of Chemistry; University of São Paulo; Av. Lineu Prestes 748 SP 05508-000 Butantã São Paulo Brazil
| | - Koiti Araki
- Department of Chemistry; Institute of Chemistry; University of São Paulo; Av. Lineu Prestes 748 SP 05508-000 Butantã São Paulo Brazil
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15
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Maekawa M, Sugimoto K, Okubo T, Kuroda-Sowa T, Munakata M. Structurally Diverse Polynuclear Copper(I) Complexes Bridged by Pyrimidine-, Pyrazine-, and Triazine-based Ligands with Several 2-Pyridyl Groups. ChemistrySelect 2016. [DOI: 10.1002/slct.201600791] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Masahiko Maekawa
- Research Institute for Science and Technology; Kinki University; 3-4-1 Kowakae, Higashi-Osaka Osaka 577-8502 Japan
| | - Kunihisa Sugimoto
- Research and Utilization Division; Japan Synchrotron Radiation Research Institute; 1-1 Kouto, Sayo-cho, Sayo-gun Hyogo 679-5198 Japan
| | - Takashi Okubo
- Department of Chemistry; Kinki University; 3-4-1 Kowakae, Higashi-Osaka Osaka 577-8502 Japan
| | - Takayoshi Kuroda-Sowa
- Department of Chemistry; Kinki University; 3-4-1 Kowakae, Higashi-Osaka Osaka 577-8502 Japan
| | - Megumu Munakata
- Department of Chemistry; Kinki University; 3-4-1 Kowakae, Higashi-Osaka Osaka 577-8502 Japan
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16
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Bai L, Li F, Wang Y, Li H, Jiang X, Sun L. Visible-light-driven selective oxidation of benzyl alcohol and thioanisole by molecular ruthenium catalyst modified hematite. Chem Commun (Camb) 2016; 52:9711-4. [PMID: 27411498 DOI: 10.1039/c6cc04327e] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Molecular ruthenium catalysts were found to selectively catalyze the oxidation of thioanisole to sulfoxide with a yield up to 100% in the presence of visible light and sacrificial reagents when they were anchored onto hematite powder. The composite photocatalysts also showed about 5 times higher efficiencies in benzyl alcohol oxidation than the system composed of dispersed molecular catalysts and hematite particles in aqueous solution. A photoelectrochemical cell based on a molecular catalyst modified hematite photoanode was further fabricated, which exhibited high activity towards the oxidation of organic substrates.
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Affiliation(s)
- Lichen Bai
- State Key Laboratory of Fine Chemicals, DUT-KTH Joint Education and Research Center on Molecular Devices, Dalian University of Technology (DUT), 116024 Dalian, China.
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17
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Chen G, Chen L, Ma L, Kwong HK, Lau TC. Photocatalytic oxidation of alkenes and alcohols in water by a manganese(v) nitrido complex. Chem Commun (Camb) 2016; 52:9271-4. [PMID: 27358025 DOI: 10.1039/c6cc04173f] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Mn(v) nitrido complex [Mn(N)(CN)4](2-) is an efficient catalyst for visible-light induced oxidation of alkenes and alcohols in water using [Ru(bpy)3](2+) as a photosensitizer and [Co(NH3)5Cl](2+) as a sacrificial oxidant. Alkenes are oxidized to epoxides and alcohols to carbonyl compounds.
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Affiliation(s)
- Gui Chen
- Department of Biology and Chemistry and Institute of Molecular Functional Materials, City University of Hong Kong, Tat Chee Avenue, Hong Kong, China.
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18
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Coe BJ, Sánchez S. Synthesis and properties of new mononuclear Ru(ii)-based photocatalysts containing 4,4′-diphenyl-2,2′-bipyridyl ligands. Dalton Trans 2016; 45:5210-22. [DOI: 10.1039/c6dt00039h] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Almost colourless trans-RuIICl2(N^N)(CO)2 (N^N = a derivative of 4,4′-diphenyl-2,2′-bipyridyl) complexes are reasonably effective photocatalytic oxidants in combination with a photosensitizer and sacrificial oxidant.
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Affiliation(s)
- Benjamin J. Coe
- School of Chemistry
- The University of Manchester
- Manchester M13 9PL
- UK
| | - Sergio Sánchez
- School of Chemistry
- The University of Manchester
- Manchester M13 9PL
- UK
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19
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Farràs P, Di Giovanni C, Clifford JN, Palomares E, Llobet A. H2 generation and sulfide to sulfoxide oxidation with H2O and sunlight with a model photoelectrosynthesis cell. Coord Chem Rev 2015. [DOI: 10.1016/j.ccr.2014.10.007] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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20
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Quaranta A, Charalambidis G, Herrero C, Margiola S, Leibl W, Coutsolelos A, Aukauloo A. Synergistic "ping-pong" energy transfer for efficient light activation in a chromophore-catalyst dyad. Phys Chem Chem Phys 2015; 17:24166-72. [PMID: 26327298 DOI: 10.1039/c5cp04458h] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
The synthesis of a porphyrin-Ru(II) polypyridine complex where the porphyrin acts as a photoactive unit and the Ru(II) polypyridine as a catalytic precursor is described. Comparatively, the free base porphyrin was found to outperform the ruthenium based chromophore in the yield of light induced electron transfer. Mechanistic insights indicate the occurrence of a ping-pong energy transfer from the (1)LC excited state of the porphyrin chromophore to the (3)MCLT state of the catalyst and back to the (3)LC excited state of the porphyrin unit. The latter, triplet-triplet energy transfer back to the chromophore, efficiently competes with fast radiationless deactivation of the excited state at the catalyst site. The energy thus recovered by the chromophore allows improved yield of formation of the oxidized form of the chromophore and concomitantly of the oxidation of the catalytic unit by intramolecular charge transfer. The presented results are among the rare examples where a porphyrin chromophore is successfully used to drive an oxidative activation process where reductive processes prevail in the literature.
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Affiliation(s)
- Annamaria Quaranta
- Service de Bioénergétique, Biologie Structurale et Mécanismes (SB2SM), CEA, iBiTec-S, Biochimie Biophysique et Biologie Structurale (B3S), I2BC, UMR 9198, F-91191 Gif-sur-Yvette, France.
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21
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Rein FN, Chen W, Scott BL, Rocha RC. Crystal structure of a mononuclear Ru(II) complex with a back-to-back terpyridine ligand: [RuCl(bpy)(tpy-tpy)](.). ACTA CRYSTALLOGRAPHICA SECTION E-CRYSTALLOGRAPHIC COMMUNICATIONS 2015; 71:1017-21. [PMID: 26396838 PMCID: PMC4555393 DOI: 10.1107/s2056989015014632] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/15/2015] [Accepted: 08/04/2015] [Indexed: 11/11/2022]
Abstract
In this first crystal structure of an Ru complex with 6′,6"-bis(pyridin-2-yl)-2,2′:4′,4":2",2"’-quaterpyridine, a ‘half’ of the ligand (one of the two terpyridyl units) is N^N^N mer-coordinated, whereas the other is free and adopts a trans,trans conformation about the interannular C—C bonds. The crystal packing features π–π stacking interactions between tpy–tpy ligands. We report the structural characterization of [6′,6′′-bis(pyridin-2-yl)-2,2′:4′,4′′:2′′,2′′′-quaterpyridine](2,2′-bipyridine)chloridoruthenium(II) hexafluoridophosphate, [RuCl(C10H8N2)(C30H20N6)]PF6, which contains the bidentate ligand 2,2′-bipyridine (bpy) and the tridendate ligand 6′,6′′-bis(pyridin-2-yl)-2,2′:4′,4′′:2′′,2′′′-quaterpyridine (tpy–tpy). The [RuCl(bpy)(tpy–tpy)]+ monocation has a distorted octahedral geometry at the central RuII ion due to the restricted bite angle [159.32 (16)°] of the tridendate ligand. The Ru-bound tpy and bpy moieties are nearly planar and essentially perpendicular to each other with a dihedral angle of 89.78 (11)° between the least-squares planes. The lengths of the two Ru—N bonds for bpy are 2.028 (4) and 2.075 (4) Å, with the shorter bond being opposite to Ru—Cl. For tpy–tpy, the mean Ru—N distance involving the outer N atoms trans to each other is 2.053 (8) Å, whereas the length of the much shorter bond involving the central N atom is 1.936 (4) Å. The Ru—Cl distance is 2.3982 (16) Å. The free uncoordinated moiety of tpy–tpy adopts a trans,trans conformation about the interannular C—C bonds, with adjacent pyridyl rings being only approximately coplanar. The crystal packing shows significant π–π stacking interactions based on tpy–tpy. The crystal structure reported here is the first for a tpy–tpy complex of ruthenium.
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Affiliation(s)
| | - Weizhong Chen
- Los Alamos National Laboratory, Los Alamos, NM 87545, USA
| | - Brian L Scott
- Los Alamos National Laboratory, Los Alamos, NM 87545, USA
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22
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Zhou X, Li F, Li X, Li H, Wang Y, Sun L. Photocatalytic oxidation of organic compounds in a hybrid system composed of a molecular catalyst and visible light-absorbing semiconductor. Dalton Trans 2015; 44:475-9. [PMID: 25407102 DOI: 10.1039/c4dt02945c] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Photocatalytic oxidation of organic compounds proceeded efficiently in a hybrid system with ruthenium aqua complexes as catalysts, BiVO4 as a light absorber, [Co(NH3)5Cl](2+) as a sacrificial electron acceptor and water as an oxygen source. The photogenerated holes in the semiconductor are used to oxidize molecular catalysts into the high-valent Ru(IV)=O intermediates for 2e(-) oxidation.
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Affiliation(s)
- Xu Zhou
- State Key Laboratory of Fine Chemicals, Dalian University of Technology (DUT), DUT-KTH Joint Education and Research Center on Molecular Devices, Dalian 116024, China.
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23
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Cheng F, He C, Yao L, Wang F, Tang N. Three trinuclear Ru(II) complexes containing 4,5-diazafluorene and 2,2′-bipyridine: synthesis, absorption spectrum, luminescence, and redox behavior. J COORD CHEM 2015. [DOI: 10.1080/00958972.2014.994512] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- Feixiang Cheng
- College of Chemistry and Chemical Engineering, Qujing Normal University, Qujing, PR China
| | - Chixian He
- College of Chemistry and Chemical Engineering, Qujing Normal University, Qujing, PR China
| | - Lifeng Yao
- College of Chemistry and Chemical Engineering, Qujing Normal University, Qujing, PR China
| | - Fan Wang
- College of Chemistry and Chemical Engineering, Qujing Normal University, Qujing, PR China
| | - Ning Tang
- College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, PR China
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24
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Davidson RJ, Wilson LE, Duckworth AR, Yufit DS, Beeby A, Low PJ. Alkyne substituted mononuclear photocatalysts based on [RuCl(bpy)(tpy)]+. Dalton Trans 2015; 44:11368-79. [DOI: 10.1039/c5dt01278c] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The introduction of ‘wire-like’ arylene ethynylene substituent to the prototypical water oxidation catalyst precursor [RuCl(2,2′-bipyridine)(2,2′:6′,2′′-terpyridine)]PF6does not significantly alter the photostability of the compounds, nor the ability of the complexes to oxidise 4-methoxybenzyl alcohol to 4-methoxybenzaldehyde.
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Affiliation(s)
| | - Lucy E. Wilson
- Department of Chemistry
- University of Durham
- Durham DH1 3LE
- UK
| | | | | | - Andrew Beeby
- Department of Chemistry
- University of Durham
- Durham DH1 3LE
- UK
| | - Paul J. Low
- School of Chemistry and Biochemistry
- University of Western Australia
- Crawley
- Australia
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25
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Li TT, Li FM, Zhao WL, Tian YH, Chen Y, Cai R, Fu WF. Highly Efficient and Selective Photocatalytic Oxidation of Sulfide by a Chromophore–Catalyst Dyad of Ruthenium-Based Complexes. Inorg Chem 2014; 54:183-91. [DOI: 10.1021/ic5020972] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Ting-Ting Li
- Key Laboratory of Photochemical Conversion
and Optoelectronic Materials and HKU-CAS Joint Laboratory on New Materials, Technical Institute of Physics and Chemistry and University of Chinese Academy of Sciences, CAS, Beijing 100190, People’s Republic of China
| | - Fu-Min Li
- College of Chemistry and Engineering, Yunnan Normal University, Kunming 650092, People’s Republic of China
| | - Wei-Liang Zhao
- College of Chemistry and Engineering, Yunnan Normal University, Kunming 650092, People’s Republic of China
| | - Yong-Hua Tian
- College of Chemistry and Engineering, Yunnan Normal University, Kunming 650092, People’s Republic of China
| | - Yong Chen
- Key Laboratory of Photochemical Conversion
and Optoelectronic Materials and HKU-CAS Joint Laboratory on New Materials, Technical Institute of Physics and Chemistry and University of Chinese Academy of Sciences, CAS, Beijing 100190, People’s Republic of China
| | - Rong Cai
- Key Laboratory of Photochemical Conversion
and Optoelectronic Materials and HKU-CAS Joint Laboratory on New Materials, Technical Institute of Physics and Chemistry and University of Chinese Academy of Sciences, CAS, Beijing 100190, People’s Republic of China
| | - Wen-Fu Fu
- Key Laboratory of Photochemical Conversion
and Optoelectronic Materials and HKU-CAS Joint Laboratory on New Materials, Technical Institute of Physics and Chemistry and University of Chinese Academy of Sciences, CAS, Beijing 100190, People’s Republic of China
- College of Chemistry and Engineering, Yunnan Normal University, Kunming 650092, People’s Republic of China
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26
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Kagalwala HN, Maurer AB, Mills IN, Bernhard S. Visible-Light-Driven Alcohol Dehydrogenation with a Rhodium Catalyst. ChemCatChem 2014. [DOI: 10.1002/cctc.201402500] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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27
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Senthil Murugan K, Rajendran T, Balakrishnan G, Ganesan M, Sivasubramanian VK, Sankar J, Ilangovan A, Ramamurthy P, Rajagopal S. Visible-light activation of the bimetallic chromophore-catalyst dyad: analysis of transient intermediates and reactivity toward organic sulfides. J Phys Chem A 2014; 118:4451-63. [PMID: 24884484 DOI: 10.1021/jp501084b] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In order to develop a new photocatalytic system, we designed a new redox-active module (5) to hold both a photosensitizer part, [Ru(II)(terpy)(bpy)X](n+) (where terpy = 2,2':6',2''-terpyridine and bpy = 2,2'-bipyridine), and a popular Jacobsen catalytic part, salen-Mn(III), covalently linked through a pyridine-based electron-relay moiety. On the basis of nanosecond laser flash photolysis studies, an intramolecular electron transfer mechanism from salen-Mn(III) to photooxidized Ru(III) chromophore yielding the catalytically active high-valent salen-Mn(IV) species was proposed. To examine the reactivity of such photogenerated salen-Mn(IV), we employed organic sulfide as substrate. Detection of the formation of a Mn(III)-phenoxyl radical and a sulfur radical cation during the course of reaction using time-resolved transient absorption spectroscopy confirms the electron transfer nature of the reaction. This is the first report for the electron transfer reaction of organic sulfide with the photochemically generated salen-Mn(IV) catalytic center.
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Affiliation(s)
- Krishnan Senthil Murugan
- Post Graduate and Research Department of Chemistry, Vivekananda College , Tiruvedakam West, Madurai 625 234, India
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28
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Chen W, Rein FN, Scott BL, Rocha RC. (2,2'-Bi-pyridine)-chlorido-[diethyl (2,2':6',2''-terpyridin-4-yl)phospho-nate]ruthenium(II) hexa-fluorido-phosphate aceto-nitrile/water solvate. Acta Crystallogr Sect E Struct Rep Online 2014; 69:m510-1. [PMID: 24427002 PMCID: PMC3884400 DOI: 10.1107/s1600536813022940] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2013] [Accepted: 08/14/2013] [Indexed: 11/17/2022]
Abstract
The cationic complex in the title compound, [RuCl(C10H8N2)(C19H20N3O3P)]PF6·0.83CH3CN·0.17H2O, is a water-oxidation precatalyst functionalized for TiO2 attachment via terpyridine phosphonate. The The RuII atom in the complex has a distorted octahedral geometry due to the restricted bite angle [159.50 (18)°] of the terpyridyl ligand. The dihedral angle between the least-squares planes of the terpyridyl and bipyridyl moieties is 86.04 (14)°. The mean Ru—N bond length for bipyridine is 2.064 (5) Å, with the bond opposite to Ru—Cl being 0.068 Å shorter. For the substituted terpyridine, the mean Ru—N distance involving the outer N atoms trans to each other is 2.057 (6) Å, whereas the bond length involving the central N atom is 1.944 (5) Å. The Ru—Cl distance is 2.4073 (15) Å. The P atom of the phosphonate group lies in the same plane as its adjacent pyridyl ring, with the ordinary character of the bond between P and Ctpy [1.801 (6) Å] allowing for free rotation of the terpyridine substituent around the P—Ctpy axis. The acetonitrile solvent molecule was refined to be disordered with two water molecules; occupancies for the acetontrile and water molecules were 0.831 (9) and 0.169 (9), respectively. Also disordered was the PF6− counter-ion (over three positions) and one of the ethoxy substituents (with two positions). The crystal structure shows significant intra- and intermolecular H⋯X contacts, especially some involving the Cl− ligand.
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Affiliation(s)
- Weizhong Chen
- Los Alamos National Laboratory, Los Alamos, NM 87545, USA
| | | | - Brian L Scott
- Los Alamos National Laboratory, Los Alamos, NM 87545, USA
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29
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Chao D, Fu WF. Insight into highly selective photocatalytic oxidation of alcohols by a new trinuclear ruthenium complex with visible light. Dalton Trans 2014; 43:306-10. [DOI: 10.1039/c3dt52157e] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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30
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Das A, Agarwala H, Kundu T, Ghosh P, Mondal S, Mobin SM, Lahiri GK. Electronic structures and selective fluoride sensing features of Os(bpy)2(HL2−) and [{Os(bpy)2}2(μ-HL2−)]2+ (H3L: 5-(1H-benzo[d]imidazol-2-yl)-1H-imidazole-4-carboxylic acid). Dalton Trans 2014; 43:13932-47. [DOI: 10.1039/c4dt01821d] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The non-innocence of coordinated HL2− in [(bpy)2Os(HL2−)]n (1n) and (2n) and their selectivity towards F− recognition were evaluated.
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Affiliation(s)
- Ankita Das
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai-400076, India
| | - Hemlata Agarwala
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai-400076, India
| | - Tanaya Kundu
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai-400076, India
| | - Prabir Ghosh
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai-400076, India
| | - Sudipta Mondal
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai-400076, India
| | - Shaikh M. Mobin
- Discipline of Chemistry
- School of Basic Sciences
- Indian Institute of Technology Indore
- Indore 452017, India
| | - Goutam Kumar Lahiri
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai-400076, India
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Raynal M, Ballester P, Vidal-Ferran A, van Leeuwen PWNM. Supramolecular catalysis. Part 1: non-covalent interactions as a tool for building and modifying homogeneous catalysts. Chem Soc Rev 2014; 43:1660-733. [DOI: 10.1039/c3cs60027k] [Citation(s) in RCA: 519] [Impact Index Per Article: 51.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Targeting human telomeric G-quadruplex DNA and inhibition of telomerase activity with [(dmb)2Ru(obip)Ru(dmb)2](4+). PLoS One 2013; 8:e84419. [PMID: 24386376 PMCID: PMC3874006 DOI: 10.1371/journal.pone.0084419] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2013] [Accepted: 11/14/2013] [Indexed: 11/19/2022] Open
Abstract
Inhibition of telomerase by inducing/stabilizing G-quadruplex formation is a promising strategy to design new anticancer drugs. We synthesized and characterized a new dinuclear complex [(dmb)2Ru(obip)Ru(dmb)2]4+ (dmb = 4,4’-dimethyl-2,2’-bipyridine, obip = (2-(2-pyridyl)imidazo[4,5-f][1,10]phenanthroline) with high affinity for both antiparallel and mixed parallel / antiparallel G-quadruplex DNA. This complex can promote the formation and stabilize G-quadruplex DNA. Dialysis and TRAP experiments indicated that [(dmb)2Ru(obip)Ru(dmb)2]4+ acted as an excellent telomerase inhibitor due to its obvious selectivity for G-quadruplex DNA rather than double stranded DNA. In vitro co-culture experiments implied that [(dmb)2Ru(obip)Ru(dmb)2]4+ inhibited telomerase activity and hindered cancer cell proliferation without side effects to normal fibroblast cells. TUNEL assay indicated that inhibition of telomerase activity induced DNA cleavage further apoptosis in cancer cells. Therefore, RuII complex represents an exciting opportunity for anticancer drug design by specifically targeting cancer cell G-quadruplexes DNA.
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Hagiwara H, Nagatomo M, Seto C, Ida S, Ishihara T. Dye-modification effects on water splitting activity of GaN:ZnO photocatalyst. J Photochem Photobiol A Chem 2013. [DOI: 10.1016/j.jphotochem.2013.08.022] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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Kundu T, Schweinfurth D, Sarkar B, Mondal TK, Fiedler J, Mobin SM, Puranik VG, Kaim W, Lahiri GK. Strong metal-metal coupling in mixed-valent intermediates [Cl(L)Ru(μ-tppz)Ru(L)Cl]+, L = β-diketonato ligands, tppz = 2,3,5,6-tetrakis(2-pyridyl)pyrazine. Dalton Trans 2013; 41:13429-40. [PMID: 23007666 DOI: 10.1039/c2dt31763j] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Five diruthenium(II) complexes [Cl(L)Ru(μ-tppz)Ru(L)Cl] (1-5) containing differently substituted β-diketonato derivatives (1: L = 2,4-pentanedionato; 2: L = 3,5-heptanedionato; 3: L = 2,2,6,6-tetramethyl-3,5-heptanedionato; 4: L = 3-methyl-2,4-pentanedionato; 5: L = 3-ethyl-2,4-pentanedionato) as ancillary ligands (L) were synthesized and studied by spectroelectrochemistry (UV-Vis-NIR, electron paramagnetic resonance (EPR)). X-ray structural characterisation revealed anti (1, 2, 5) or syn (3) configuration as well as non-planarity of the bis-tridentate tppz bridge and strong dπ(Ru(II)) → π*(pyrazine, tppz) back-bonding. The widely separated one-electron oxidation steps, Ru(II)Ru(II)/Ru(II)Ru(III) and Ru(II)Ru(III)/Ru(III)Ru(III), result in large comproportionation constants (K(c)) of ≥10(10) for the mixed-valent intermediates. The syn-configurated (n) exhibits a particularly high K(c) of 10(12) for n = 1+, accompanied by density functional theory (DFT)-calculated minimum Ru-N bond lengths for this Ru(II)Ru(III) intermediate. The electrogenerated mixed-valent states 1(+)-5(+) exhibit anisotropic EPR spectra at 110 K with average values <g> of 2.304-2.234 and g anisotropies Δg = g(1)-g(3) of 0.82-0.99. Metal-to-metal charge transfer (MMCT) absorptions occur for 1(+)-5(+) in the NIR region at 1660 nm-1750 nm (ε ≈ 2700 dm(3) mol(-1) cm(-1), Δν(1/2) ≈ 1800 cm(-1)). DFT calculations of 1(+) and 3(+) yield comparable Mulliken spin densities of about 0.60 for the metal ions, corresponding to valence-delocalised situations (Ru(2.5))(2). Rather large spin densities of about -0.4 were calculated for the tppz bridges in 1(+) and 3(+). The calculated electronic interaction values (V(AB)) for 1(+)-5(+) are about 3000 cm(-1), comparable to that for the Creutz-Taube ion at 3185 cm(-1). The DFT calculations predict that the Ru(III)Ru(III) forms in 1(2+)-5(2+) prefer a triplet (S = 1) ground state with ΔE (S = 0 - S = 1) ∼5000 cm(-1). One-electron reduction takes place at the tppz bridge which results in species [Cl(L)Ru(II)(μ-tppz˙(-))Ru(II)(L)Cl](-) (1˙(-)-3˙(-), 5˙(-)) which exhibit free radical-type EPR signals and NIR transitions typical of the tppz radical anion. The system 4(n) is distinguished by lability of the Ru-Cl bonds.
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Affiliation(s)
- Tanaya Kundu
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai-400076, India.
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35
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Chao D, Fu WF. Facile synthesis of a ruthenium assembly and its application for light-driven oxidation of alcohols in water. Chem Commun (Camb) 2013; 49:3872-4. [PMID: 23546454 DOI: 10.1039/c3cc00305a] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
A supramolecular assembly containing two light harvesting fragments [Ru(tpy)2](2+) and one catalytic unit [Ru(tpy)(bpy)Cl](+) was synthesized in a facile manner in 90% yield, and exhibited high photocatalytic product-selectivity compared with the corresponding bimolecular system in the light-driven oxidation of alcohols using [Co(NH3)5Cl]Cl2 as a sacrificial oxidant in water at room temperature.
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Affiliation(s)
- Duobin Chao
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, CAS-HKU Joint Laboratory on New Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, PR China
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36
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Lee SY, Chan KS. Photocatalytic Carbon–Carbon σ-Bond Anaerobic Oxidation of Ketones with Water by Rhodium(III) Porphyrins. Organometallics 2013. [DOI: 10.1021/om400672t] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Siu Yin Lee
- Department
of Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, People’s Republic of China
| | - Kin Shing Chan
- Department
of Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, People’s Republic of China
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37
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Farràs P, Maji S, Benet-Buchholz J, Llobet A. Synthesis, Characterization, and Reactivity of Dyad Ruthenium-Based Molecules for Light-Driven Oxidation Catalysis. Chemistry 2013; 19:7162-72. [DOI: 10.1002/chem.201204381] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2012] [Indexed: 11/09/2022]
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38
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Lazarides T, Sazanovich IV, Simaan AJ, Kafentzi MC, Delor M, Mekmouche Y, Faure B, Réglier M, Weinstein JA, Coutsolelos AG, Tron T. Visible Light-Driven O2 Reduction by a Porphyrin–Laccase System. J Am Chem Soc 2013; 135:3095-103. [DOI: 10.1021/ja309969s] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Theodore Lazarides
- Chemistry
Department, University of Crete, Voutes
Campus, 71003 Heraklion,
Crete, Greece
| | - Igor V. Sazanovich
- Department
of Chemistry, University of Sheffield,
Sheffield S3 7HF, United Kingdom
| | - A. Jalila Simaan
- Aix-Marseille Université, CNRS
UMR 7313, case 342, 13397 Marseille Cedex 20, France
| | - Maria Chrisanthi Kafentzi
- Chemistry
Department, University of Crete, Voutes
Campus, 71003 Heraklion,
Crete, Greece
- Aix-Marseille Université, CNRS
UMR 7313, case 342, 13397 Marseille Cedex 20, France
| | - Milan Delor
- Department
of Chemistry, University of Sheffield,
Sheffield S3 7HF, United Kingdom
| | - Yasmina Mekmouche
- Aix-Marseille Université, CNRS
UMR 7313, case 342, 13397 Marseille Cedex 20, France
| | - Bruno Faure
- Aix-Marseille Université, CNRS
UMR 7313, case 342, 13397 Marseille Cedex 20, France
| | - Marius Réglier
- Aix-Marseille Université, CNRS
UMR 7313, case 342, 13397 Marseille Cedex 20, France
| | - Julia A. Weinstein
- Department
of Chemistry, University of Sheffield,
Sheffield S3 7HF, United Kingdom
| | | | - Thierry Tron
- Aix-Marseille Université, CNRS
UMR 7313, case 342, 13397 Marseille Cedex 20, France
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39
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Jude H, Scott BL, Rocha RC. μ-2,3,5,6-Tetra-kis(pyridin-2-yl)pyrazine-bis-[(2,2':6',2''-terpyridine)-ruthenium(II)] tetra-kis-(hexa-fluoridophosphate) acetonitrile tetra-solvate. Acta Crystallogr Sect E Struct Rep Online 2013; 69:m81-2. [PMID: 23424426 PMCID: PMC3569182 DOI: 10.1107/s1600536812051215] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2012] [Accepted: 12/18/2012] [Indexed: 11/10/2022]
Abstract
In the title compound [Ru(2)(C(15)H(11)N(3))(2)(C(24)H(16)N(6))](PF(6))(4)·4CH(3)CN, two of the counter-ions and one of the solvent mol-ecules are disordered with occupancies for the major components between 0.57 (2) and 0.64 (1). The structure of the dinuclear tetracation exhibits significant distortion from planarity in the bridging 2,3,5,6-tetra-kis-(pyridin-2-yl)pyrazine (tppz) ligand, which has a saddle-like geometry with an average dihedral angle of 42.96 (18)° between adjacent pyridine rings. The metal-ligand coordination environment is nearly equivalent for the two Ru(II) atoms, which have a distorted octa-hedral geometry due to the restricted bite angle [157.57 (13)-159.28 (12)°] of their two mer-arranged tridendate ligands [2,2':6',2''-terpyridine (tpy) and tppz] orthogonal to each other. At the peripheral tpy ligands, the average Ru-N bond distance is 2.072 (4) Å for the outer N atoms trans to each other (N(outer)) and 1.984 (1) Å for the central N atoms (N(central)). At the bridging tppz ligand, the average metal-ligand distances are significantly shorter [2.058 (4) Å for Ru-N(outer) and 1.965 (1) Å for Ru-N(central)] as a result of both the geometric constraints and the stronger π-acceptor ability of the pyrazine-centered bridge. The dihedral angle between the two tpy planes is 27.11 (6)°. The intra-molecular linear distance between the two Ru atoms is 6.6102 (7) Å.
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Affiliation(s)
- Hershel Jude
- Los Alamos National Laboratory, MPA Division, Los Alamos, NM 87545, USA
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40
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Matlachowski C, Schwalbe M. Synthesis and characterization of mono- and dinuclear phenanthroline-extended tetramesitylporphyrin complexes as well as UV-Vis and EPR studies on their one-electron reduced species. Dalton Trans 2013; 42:3490-503. [DOI: 10.1039/c2dt32196c] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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41
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Ohzu S, Ishizuka T, Hirai Y, Fukuzumi S, Kojima T. Photocatalytic oxidation of organic compounds in water by using ruthenium(II)-pyridylamine complexes as catalysts with high efficiency and selectivity. Chemistry 2012; 19:1563-7. [PMID: 23239043 DOI: 10.1002/chem.201203430] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2012] [Indexed: 11/09/2022]
Affiliation(s)
- Shingo Ohzu
- Department of Chemistry, Graduate School of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennoudai, Tsukuba, Ibaraki 305-8571, Japan
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42
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Kaveevivitchai N, Chitta R, Zong R, El Ojaimi M, Thummel RP. A Molecular Light-Driven Water Oxidation Catalyst. J Am Chem Soc 2012; 134:10721-4. [DOI: 10.1021/ja300797g] [Citation(s) in RCA: 138] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Nattawut Kaveevivitchai
- Department of Chemistry,
136 Fleming Building, University of Houston, Houston, Texas 77204-5003, United
States
| | - Raghu Chitta
- Department of Chemistry,
136 Fleming Building, University of Houston, Houston, Texas 77204-5003, United
States
| | - Ruifa Zong
- Department of Chemistry,
136 Fleming Building, University of Houston, Houston, Texas 77204-5003, United
States
| | - Maya El Ojaimi
- Department of Chemistry,
136 Fleming Building, University of Houston, Houston, Texas 77204-5003, United
States
| | - Randolph P. Thummel
- Department of Chemistry,
136 Fleming Building, University of Houston, Houston, Texas 77204-5003, United
States
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43
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Padilla R, Ruminski RR, Meredith McGinley VA, Williams PB. The syntheses and characterization of Os(II) and Ru(II)/Os(II) bimetallic complexes with dipyrido(2,3-a:3′,2′-j)phenazine (dpop′) and the bridging ligand 2,3,5,6-tetra(2-pyridyl)-pyrazine (tppz). Polyhedron 2012. [DOI: 10.1016/j.poly.2011.11.012] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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44
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Guillo P, Hamelin O, Batat P, Jonusauskas G, McClenaghan ND, Ménage S. Photocatalyzed sulfide oxygenation with water as the unique oxygen atom source. Inorg Chem 2012; 51:2222-30. [PMID: 22296643 DOI: 10.1021/ic2022159] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
In our research program aiming to develop new ruthenium-based polypyridine catalysts for oxidation we were interested in combining a photosensitizer and a catalytic fragment within the same complex to achieve catalytic light-driven oxidation. To respond to the lack of such conjugates, we report here a new catalytic system capable of using light to activate water molecules in order to perform selective sulfide oxygenation into sulfoxide via an oxygen atom transfer from H(2)O to the substrate with a TON of up to 197 ± 6. On the basis of electrochemical and photophysical studies, a proton-coupled electron-transfer process yielding to an oxidant Ru(IV)-oxo species was proposed. In particular, the synergistic effect between both partners in the dyad yielding a more efficient catalyst compared to the bimolecular system is highlighted.
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Affiliation(s)
- Pascal Guillo
- Laboratoire de Chimie et Biologie des Métaux, UMR 5249-Université Grenoble I-CNRS-CEA CEA Grenoble, 17 Avenue des Martyrs, 38054 Grenoble, France
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45
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Li F, Jiang Y, Zhang B, Huang F, Gao Y, Sun L. Towards A Solar Fuel Device: Light-Driven Water Oxidation Catalyzed by a Supramolecular Assembly. Angew Chem Int Ed Engl 2012; 51:2417-20. [DOI: 10.1002/anie.201108051] [Citation(s) in RCA: 114] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2011] [Indexed: 12/19/2022]
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46
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Li F, Jiang Y, Zhang B, Huang F, Gao Y, Sun L. Towards A Solar Fuel Device: Light-Driven Water Oxidation Catalyzed by a Supramolecular Assembly. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201108051] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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47
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Li F, Yu M, Jiang Y, Huang F, Li Y, Zhang B, Sun L. Chemical and photochemical oxidation of organic substrates by ruthenium aqua complexes with water as an oxygen source. Chem Commun (Camb) 2011; 47:8949-51. [PMID: 21738912 DOI: 10.1039/c1cc12558c] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two ruthenium aqua complexes were shown to be effective catalysts in chemical and photochemical oxidation of hydrocarbons. A remarkable activity (up to 90% yield and 100% selectivity) was performed in conversion of sulfide to sulfoxide by homogeneous photooxidation.
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Affiliation(s)
- Fei Li
- State Key Laboratory of Fine Chemicals, Dalian University of Technology (DUT), DUT-KTH Joint Education and Research Center on Molecular Devices, Dalian 116024, China.
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