51
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Visible light-promoted reductive transformations of various organic substances by using hydroxyaryl-substituted benzimidazolines and bases. Tetrahedron 2016. [DOI: 10.1016/j.tet.2016.05.078] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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52
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Liu LJ, Wang W, Kang TS, Liang JX, Liu C, Kwong DWJ, Wong VKW, Ma DL, Leung CH. Antagonizing STAT5B dimerization with an osmium complex. Sci Rep 2016; 6:36044. [PMID: 27853239 PMCID: PMC5113070 DOI: 10.1038/srep36044] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2016] [Accepted: 10/11/2016] [Indexed: 12/23/2022] Open
Abstract
Targeting STAT5 is an appealing therapeutic strategy for the treatment of hematologic malignancies and inflammation. Here, we present the novel osmium(II) complex 1 as the first metal-based inhibitor of STAT5B dimerization. Complex 1 exhibited superior inhibitory activity against STAT5B DNA binding compared to STAT5A DNA binding. Moreover, 1 repressed STAT5B transcription and blocked STAT5B dimerization via binding to the STAT5B protein, thereby inhibiting STAT5B translocation to the nucleus. Furthermore, 1 was able to selectively inhibit STAT5B phosphorylation without affecting the expression level of STAT5B.
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Affiliation(s)
- Li-Juan Liu
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macao, China
| | - Wanhe Wang
- Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Hong Kong, China
| | - Tian-Shu Kang
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macao, China
| | - Jia-Xin Liang
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macao, China
| | - Chenfu Liu
- Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Hong Kong, China
| | - Daniel W. J. Kwong
- Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Hong Kong, China
| | - Vincent Kam Wai Wong
- State Key Laboratory of Quality Research in Chinese Medicine, Macau University of Science and Technology, Taipa, Macao, China
| | - Dik-Lung Ma
- Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Hong Kong, China
| | - Chung-Hang Leung
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macao, China
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53
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Liu X, Inagaki S, Gong J. Heterogene molekulare Systeme für eine photokatalytische CO2-Reduktion mit Wasseroxidation. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201600395] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Xiao Liu
- Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology; Tianjin University; Collaborative Innovation Center of Chemical Science and Engineering; Tianjin 300072 China
| | - Shinji Inagaki
- Toyota Central R&D Laboratories, Inc.; Nagakute Aichi 480-1192 Japan
| | - Jinlong Gong
- Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology; Tianjin University; Collaborative Innovation Center of Chemical Science and Engineering; Tianjin 300072 China
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54
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Sahara G, Kumagai H, Maeda K, Kaeffer N, Artero V, Higashi M, Abe R, Ishitani O. Photoelectrochemical Reduction of CO 2 Coupled to Water Oxidation Using a Photocathode with a Ru(II)-Re(I) Complex Photocatalyst and a CoO x/TaON Photoanode. J Am Chem Soc 2016; 138:14152-14158. [PMID: 27690409 DOI: 10.1021/jacs.6b09212] [Citation(s) in RCA: 152] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Photoelectrochemical CO2 reduction activity of a hybrid photocathode, based on a Ru(II)-Re(I) supramolecular metal complex photocatalyst immobilized on a NiO electrode (NiO-RuRe), was confirmed in an aqueous electrolyte solution. Under half-reaction conditions, the NiO-RuRe photocathode generated CO with high selectivity, and its turnover number for CO formation reached 32 based on the amount of immobilized RuRe. A photoelectrochemical cell comprising a NiO-RuRe photocathode and a CoOx/TaON photoanode showed activity for visible-light-driven CO2 reduction using water as a reductant to generate CO and O2, with the assistance of an external electrical (0.3 V) and chemical (0.10 V) bias produced by a pH difference. This is the first example of a molecular and semiconductor photocatalyst hybrid-constructed photoelectrochemical cell for visible-light-driven CO2 reduction using water as a reductant.
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Affiliation(s)
- Go Sahara
- Department of Chemistry, School of Science, Tokyo Institute of Technology , O-okayama 2-12-1-NE-1, Meguro-ku, Tokyo 152-8550, Japan
| | - Hiromu Kumagai
- Department of Chemistry, School of Science, Tokyo Institute of Technology , O-okayama 2-12-1-NE-1, Meguro-ku, Tokyo 152-8550, Japan
| | - Kazuhiko Maeda
- Department of Chemistry, School of Science, Tokyo Institute of Technology , O-okayama 2-12-1-NE-1, Meguro-ku, Tokyo 152-8550, Japan
| | - Nicolas Kaeffer
- Laboratoire de Chimie et Biologie des Métaux, Université Grenoble Alpes , CNRS UMR 5249, CEA, F-38000 Grenoble, France
| | - Vincent Artero
- Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University , Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Masanobu Higashi
- Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University , Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Ryu Abe
- Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University , Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Osamu Ishitani
- Department of Chemistry, School of Science, Tokyo Institute of Technology , O-okayama 2-12-1-NE-1, Meguro-ku, Tokyo 152-8550, Japan
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55
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Liu X, Inagaki S, Gong J. Heterogeneous Molecular Systems for Photocatalytic CO2Reduction with Water Oxidation. Angew Chem Int Ed Engl 2016; 55:14924-14950. [DOI: 10.1002/anie.201600395] [Citation(s) in RCA: 248] [Impact Index Per Article: 31.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2016] [Indexed: 12/20/2022]
Affiliation(s)
- Xiao Liu
- Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology; Tianjin University; Collaborative Innovation Center of Chemical Science and Engineering; Tianjin 300072 China
| | - Shinji Inagaki
- Toyota Central R&D Laboratories, Inc.; Nagakute Aichi 480-1192 Japan
| | - Jinlong Gong
- Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology; Tianjin University; Collaborative Innovation Center of Chemical Science and Engineering; Tianjin 300072 China
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56
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Cui SC, Sun XZ, Liu JG. Photo-reduction of CO2 Using a Rhenium Complex Covalently Supported on a Graphene/TiO2 Composite. CHEMSUSCHEM 2016; 9:1698-1703. [PMID: 27254666 DOI: 10.1002/cssc.201600360] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2016] [Revised: 04/25/2016] [Indexed: 06/05/2023]
Abstract
One of the promising solutions for decreasing atmospheric CO2 is artificial photosynthesis, in which CO2 can be photoconverted into solar fuels. In this study, a rhenium complex Re(PyBn)(CO)3 Cl (PyBn=1-(2-picolyl)-4-phenyl-1H-1,2,3-triazole) was covalently grafted onto the surface of reduced graphene oxide (rGO). This was further combined with TiO2 to fabricate a novel catalyst composite TiO2 -rGO-Re(PyBn)(CO)3 Cl for CO2 photo-reduction. This hybrid composite demonstrated high selectivity conversion of CO2 into CO under xenon-lamp irradiation. Compared with the unsupported homogeneous catalyst Re(PyBn)(CO)3 Cl, the covalent immobilized catalyst composite TiO2 -rGO-Re(PyBn)(CO)3 Cl enhanced the turnover number six times and significantly improved catalyst stability. During the process of CO2 photo-reduction, intermediate species with lifetimes longer than hundreds of microseconds were observed and the formation of CO products was revealed using timeresolved infrared spectroscopy. A plausible mechanism for CO2 photo-reduction by the TiO2 -rGO-Re(PyBn)(CO)3 Cl catalyst composite has been suggested. The obtained results have implications for the future design of efficient catalyst composites for CO2 photo-conversion.
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Affiliation(s)
- Shi-Cong Cui
- Department of Chemistry, East China University of Science and Technology, Shanghai, 200237, P. R. China
| | - Xue-Zhong Sun
- School of Chemistry, University of Nottingham, University Park, Nottingham, NG7 2RD, U.K
| | - Jin-Gang Liu
- Department of Chemistry, East China University of Science and Technology, Shanghai, 200237, P. R. China.
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57
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Nakada A, Nakashima T, Sekizawa K, Maeda K, Ishitani O. Visible-light-driven CO 2 reduction on a hybrid photocatalyst consisting of a Ru(ii) binuclear complex and a Ag-loaded TaON in aqueous solutions. Chem Sci 2016; 7:4364-4371. [PMID: 30155083 PMCID: PMC6014105 DOI: 10.1039/c6sc00586a] [Citation(s) in RCA: 85] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2016] [Accepted: 03/23/2016] [Indexed: 11/21/2022] Open
Abstract
A hybrid photocatalyst consisting of a Ru(ii) binuclear complex and a Ag-loaded TaON reduced CO2 by visible light even in aqueous solution. The distribution of the reduction products was strongly affected by the pH of the reaction solution. HCOOH was selectively produced in neutral conditions, whereas the formation of HCOOH competed with H2 evolution in acidic conditions. Detailed mechanistic studies revealed that the photocatalytic CO2 reduction proceeded via 'Z-schematic' electron transfer with step-by-step photoexcitation of TaON and the photosensitizer unit in the Ru(ii) binuclear complex. The maximum turnover number for HCOOH formation was 750 based on the Ru(ii) binuclear complex under visible-light irradiation, and the optimum external quantum efficiency of the HCOOH formation was 0.48% using 400 nm monochromic light with ethylenediaminetetraacetic acid disodium salt as a sacrificial reductant. Even in aqueous solution, the hybrid could also convert visible-light energy into chemical energy (ΔG0 = +83 kJ mol-1) by the reduction of CO2 to HCOOH with methanol oxidation.
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Affiliation(s)
- Akinobu Nakada
- Department of Chemistry , Graduate School of Science and Engineering , Tokyo Institute of Technology , 2-12-1-NE-1 O-okayama, Meguro-ku , Tokyo 152-8550 , Japan .
| | - Takuya Nakashima
- Department of Chemistry , Graduate School of Science and Engineering , Tokyo Institute of Technology , 2-12-1-NE-1 O-okayama, Meguro-ku , Tokyo 152-8550 , Japan .
| | - Keita Sekizawa
- Department of Chemistry , Graduate School of Science and Engineering , Tokyo Institute of Technology , 2-12-1-NE-1 O-okayama, Meguro-ku , Tokyo 152-8550 , Japan .
| | - Kazuhiko Maeda
- Department of Chemistry , Graduate School of Science and Engineering , Tokyo Institute of Technology , 2-12-1-NE-1 O-okayama, Meguro-ku , Tokyo 152-8550 , Japan .
| | - Osamu Ishitani
- Department of Chemistry , Graduate School of Science and Engineering , Tokyo Institute of Technology , 2-12-1-NE-1 O-okayama, Meguro-ku , Tokyo 152-8550 , Japan .
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58
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Maurin A, Ng CO, Chen L, Lau TC, Robert M, Ko CC. Photochemical and electrochemical catalytic reduction of CO2 with NHC-containing dicarbonyl rhenium(i) bipyridine complexes. Dalton Trans 2016; 45:14524-9. [PMID: 27293154 DOI: 10.1039/c6dt01686c] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
The electrochemical and photochemical catalytic reductions of CO2 using N,O and N,S-NHC-containing dicarbonyl rhenium(i) bipyridine complexes have been investigated. By replacing the carbonyl ligand in tricarbonyl rhenium(i) complexes with a weaker π-accepting ligand, the characteristic MLCT transitions shifted to lower energy. This makes photocatalysts capable of harvesting low-energy visible light for catalyzing CO2 reduction. A detailed study revealed that these dicarbonyl rhenium(i) complexes are also highly selective for photocatalysis of CO2 to CO with a good quantum efficiency (10%), similar to that of the tricarbonyl rhenium(i) complex analogues. From the electrochemical study, it was observed that the catalysts efficiently produce CO from CO2 with high turnover frequency and good stability over time.
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Affiliation(s)
- Antoine Maurin
- Université Paris Diderot, Sorbonne Paris Cité, Laboratoire d'Electrochimie Moléculaire, Unité Mixte de Recherche Université-CNRS no. 7591, Bâtiment Lavoisier, 15 rue Jean de Baïf, 75205 Paris Cedex 13, France.
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59
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Hasheminasab A, Dawadi MB, Mehr HS, Herrick RS, Ziegler CJ. Re(CO)3 Metallopolymers with Complete Metal Monomer Incorporation: Synthetic, Spectroscopic, Electrochemical, and Computational Studies. Macromolecules 2016. [DOI: 10.1021/acs.macromol.6b00343] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Abed Hasheminasab
- Department
of Chemistry, The University of Akron, Akron, Ohio 44325-3601, United States
| | - Mahesh B. Dawadi
- Department
of Chemistry, The University of Akron, Akron, Ohio 44325-3601, United States
| | - Hamideh Shokouhi Mehr
- Department
of Chemistry, The University of Akron, Akron, Ohio 44325-3601, United States
| | - Richard S. Herrick
- Department
of Chemistry, College of the Holy Cross, Box C, Worcester, Massachusetts 01610- 2395, United States
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60
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Takeda H, Ohashi K, Sekine A, Ishitani O. Photocatalytic CO2 Reduction Using Cu(I) Photosensitizers with a Fe(II) Catalyst. J Am Chem Soc 2016; 138:4354-7. [DOI: 10.1021/jacs.6b01970] [Citation(s) in RCA: 221] [Impact Index Per Article: 27.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Hiroyuki Takeda
- Department
of Chemistry, Graduate School of Science and Engineering, Tokyo Institute of Technology, 2-12-1-NE-1 O-okayama, Meguro-ku, Tokyo 152-8550, Japan
| | - Kenji Ohashi
- Department
of Chemistry, Graduate School of Science and Engineering, Tokyo Institute of Technology, 2-12-1-NE-1 O-okayama, Meguro-ku, Tokyo 152-8550, Japan
| | - Akiko Sekine
- Department
of Chemistry and Material Science, Graduate School of Science and
Engineering, Tokyo Institute of Technology, 2-12-1-H60 O-okayama, Meguro-ku, Tokyo 152-8551, Japan
| | - Osamu Ishitani
- Department
of Chemistry, Graduate School of Science and Engineering, Tokyo Institute of Technology, 2-12-1-NE-1 O-okayama, Meguro-ku, Tokyo 152-8550, Japan
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61
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Berlinguette CP. Editorial for the ACS select virtual issue on inorganic chemistry driving the energy sciences. Inorg Chem 2016; 54:3079-83. [PMID: 25843332 DOI: 10.1021/acs.inorgchem.5b00490] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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62
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Structural and photophysical characterization of a tin(IV) porphyrin–rhenium(I)(diimine) conjugate. Inorganica Chim Acta 2016. [DOI: 10.1016/j.ica.2015.10.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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63
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Mengele AK, Kaufhold S, Streb C, Rau S. Generation of a stable supramolecular hydrogen evolving photocatalyst by alteration of the catalytic center. Dalton Trans 2016; 45:6612-8. [DOI: 10.1039/c6dt00130k] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The change of the catalytic center from MX2 to RhCp*Cl leads to a stability boost in [(tbbpy)2Ru(tpphz)] based supramolecular photocatalysts.
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Affiliation(s)
- Alexander K. Mengele
- University of Ulm
- Institute of Inorganic Chemistry Materials and Catalysis
- 89081 Ulm
- Germany
| | - Simon Kaufhold
- University of Ulm
- Institute of Inorganic Chemistry Materials and Catalysis
- 89081 Ulm
- Germany
| | - Carsten Streb
- University of Ulm
- Institute of Inorganic Chemistry Materials and Catalysis
- 89081 Ulm
- Germany
| | - Sven Rau
- University of Ulm
- Institute of Inorganic Chemistry Materials and Catalysis
- 89081 Ulm
- Germany
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64
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Abstract
A series of Re(I) pyridyl N-heterocyclic carbene (NHC) complexes have been synthesized and examined in the photocatalytic reduction of CO2 using a simulated solar spectrum. The catalysts were characterized through NMR, UV-vis, cyclic voltammetry under nitrogen, and cyclic voltammetry under carbon dioxide. The complexes were compared directly with a known benchmark catalyst, Re(bpy) (CO)3Br. An electron-deficient NHC substituent (PhCF3) was found to promote catalytic activity when compared with electron-neutral and -rich substituents. Re(PyNHC-PhCF3) (CO)3Br was found to exceed the CO production of the benchmark Re(bpy) (CO)3Br catalyst (51 vs 33 TON) in the presence of electron donor BIH and photosensitizer fac-Ir(ppy)3. Importantly, Re(PyNHC-PhCF3) (CO)3Br was found to function without a photosensitizer (32 TON) at substantially higher turnovers than the benchmark catalyst Re(bpy) (CO)3Br (14 TON) under a solar simulated spectrum.
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Affiliation(s)
- Aron J Huckaba
- Department of Chemistry and Biochemistry, University of Mississippi , 405 Coulter Hall, University, Mississippi 38677, United States
| | - Emily Anne Sharpe
- Department of Chemistry and Biochemistry, University of Mississippi , 405 Coulter Hall, University, Mississippi 38677, United States
| | - Jared H Delcamp
- Department of Chemistry and Biochemistry, University of Mississippi , 405 Coulter Hall, University, Mississippi 38677, United States
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65
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Photocatalytic reduction of CO2 using metal complexes. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY C-PHOTOCHEMISTRY REVIEWS 2015. [DOI: 10.1016/j.jphotochemrev.2015.09.001] [Citation(s) in RCA: 349] [Impact Index Per Article: 38.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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66
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Bi Y, Ehsan MF, Huang Y, Jin J, He T. Synthesis of Cr-doped SrTiO3 photocatalyst and its application in visible-light-driven transformation of CO2 into CH4. J CO2 UTIL 2015. [DOI: 10.1016/j.jcou.2015.10.004] [Citation(s) in RCA: 56] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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67
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Unique photophysical properties of chlorophyll derivatives linked with CO 2 -reducing moiety along the Qy axis. J Photochem Photobiol A Chem 2015. [DOI: 10.1016/j.jphotochem.2015.06.016] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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68
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Aryl-substituted dimethylbenzimidazolines as effective reductants of photoinduced electron transfer reactions. Tetrahedron 2015. [DOI: 10.1016/j.tet.2015.06.071] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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69
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Kuramochi Y, Fukaya K, Yoshida M, Ishida H. trans-(Cl)-[Ru(5,5′-diamide-2,2′-bipyridine)(CO)2Cl2]: Synthesis, Structure, and Photocatalytic CO2Reduction Activity. Chemistry 2015; 21:10049-60. [DOI: 10.1002/chem.201500782] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2015] [Indexed: 11/09/2022]
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70
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Kuramochi Y, Itabashi J, Fukaya K, Enomoto A, Yoshida M, Ishida H. Unexpected effect of catalyst concentration on photochemical CO 2 reduction by trans(Cl)-Ru(bpy)(CO) 2Cl 2: new mechanistic insight into the CO/HCOO - selectivity. Chem Sci 2015; 6:3063-3074. [PMID: 28706681 PMCID: PMC5490049 DOI: 10.1039/c5sc00199d] [Citation(s) in RCA: 90] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2015] [Accepted: 03/03/2015] [Indexed: 11/21/2022] Open
Abstract
Photochemical CO2 reduction catalysed by trans(Cl)-Ru(bpy)(CO)2Cl2 (bpy = 2,2'-bipyridine) efficiently produces carbon monoxide (CO) and formate (HCOO-) in N,N-dimethylacetamide (DMA)/water containing [Ru(bpy)3]2+ as a photosensitizer and 1-benzyl-1,4-dihydronicotinamide (BNAH) as an electron donor. We have unexpectedly found catalyst concentration dependence of the product ratio (CO/HCOO-) in the photochemical CO2 reduction: the ratio of CO/HCOO- decreases with increasing catalyst concentration. The result has led us to propose a new mechanism in which HCOO- is selectively produced by the formation of a Ru(i)-Ru(i) dimer as the catalyst intermediate. This reaction mechanism predicts that the Ru-Ru bond dissociates in the reaction of the dimer with CO2, and that the insufficient electron supply to the catalyst results in the dominant formation of HCOO-. The proposed mechanism is supported by the result that the time-course profiles of CO and HCOO- in the photochemical CO2 reduction catalysed by [Ru(bpy)(CO)2Cl]2 (0.05 mM) are very similar to those of the reduction catalysed by trans(Cl)-Ru(bpy)(CO)2Cl2 (0.10 mM), and that HCOO- formation becomes dominant under low-intensity light. The kinetic analyses based on the proposed mechanism could excellently reproduce the unusual catalyst concentration effect on the product ratio. The catalyst concentration effect observed in the photochemical CO2 reduction using [Ru(4dmbpy)3]2+ (4dmbpy = 4,4'-dimethyl-2,2'-bipyridine) instead of [Ru(bpy)3]2+ as the photosensitizer is also explained with the kinetic analyses, reflecting the smaller quenching rate constant of excited [Ru(4dmbpy)3]2+ by BNAH than that of excited [Ru(bpy)3]2+. We have further synthesized trans(Cl)-Ru(6Mes-bpy)(CO)2Cl2 (6Mes-bpy = 6,6'-dimesityl-2,2'-bipyridine), which bears bulky substituents at the 6,6'-positions in the 2,2'-bipyridyl ligand, so that the ruthenium complex cannot form the dimer due to the steric hindrance. We have found that this ruthenium complex selectively produces CO, which strongly supports the catalytic mechanism proposed in this work.
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Affiliation(s)
- Yusuke Kuramochi
- Department of Chemistry , Graduate School of Science , Kitasato University , 1-15-1 Kitasato, Minami-ku , Sagamihara , Kanagawa 252-0373 , Japan .
| | - Jun Itabashi
- Department of Chemistry , Graduate School of Science , Kitasato University , 1-15-1 Kitasato, Minami-ku , Sagamihara , Kanagawa 252-0373 , Japan .
| | - Kyohei Fukaya
- Department of Chemistry , Graduate School of Science , Kitasato University , 1-15-1 Kitasato, Minami-ku , Sagamihara , Kanagawa 252-0373 , Japan .
| | - Akito Enomoto
- Department of Chemistry , Graduate School of Science , Kitasato University , 1-15-1 Kitasato, Minami-ku , Sagamihara , Kanagawa 252-0373 , Japan .
| | - Makoto Yoshida
- Department of Chemistry , Graduate School of Science , Kitasato University , 1-15-1 Kitasato, Minami-ku , Sagamihara , Kanagawa 252-0373 , Japan .
| | - Hitoshi Ishida
- Department of Chemistry , Graduate School of Science , Kitasato University , 1-15-1 Kitasato, Minami-ku , Sagamihara , Kanagawa 252-0373 , Japan . .,Precursory Research for Embryonic Science (PRESTO) , Japan Science and Technology Agency (JST) , 4-1-8 Honcho , Kawaguchi , Saitama 332-0012 , Japan
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71
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Kato E, Takeda H, Koike K, Ohkubo K, Ishitani O. Ru(ii)-Re(i) binuclear photocatalysts connected by -CH 2XCH 2- (X = O, S, CH 2) for CO 2 reduction. Chem Sci 2015; 6:3003-3012. [PMID: 29403638 PMCID: PMC5729417 DOI: 10.1039/c4sc03710c] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2014] [Accepted: 02/28/2015] [Indexed: 11/21/2022] Open
Abstract
We developed Ru(ii)-Re(i) supramolecular photocatalysts in which each metal complex unit is connected by a -CH2XCH2- (X = O, S, CH2) chain. The photocatalyst with X = O exhibited the best photocatalytic efficiency for CO2 reduction in the reported systems using a NAD(P)H model compound as an electron donor because the introduced oxygen atom strengthened the oxidation power of the Ru photosensitizer unit in the excited state and accelerated electron transfer from the one-electron-reduced Ru photosensitizer unit to the Re catalyst unit. In contrast, the catalytic ability of the photocatalyst with X = S rapidly decreased during irradiation because the supramolecular structure split into mononuclear complexes. A detailed mechanism for the efficient photocatalytic reaction involving these supramolecular photocatalysts was investigated for the first time.
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Affiliation(s)
- Eishiro Kato
- Department of Chemistry , Graduate School of Science and Engineering , Tokyo Institute of Technology , 2-12-1-NE1, O-okayama , Meguro-ku , Tokyo 152-8550 , Japan .
| | - Hiroyuki Takeda
- Department of Chemistry , Graduate School of Science and Engineering , Tokyo Institute of Technology , 2-12-1-NE1, O-okayama , Meguro-ku , Tokyo 152-8550 , Japan . .,CREST , Japan Science and Technology Agency , 4-1-8 Honcho , Kawaguchi-shi , Saitama 322-0012 , Japan
| | - Kazuhide Koike
- CREST , Japan Science and Technology Agency , 4-1-8 Honcho , Kawaguchi-shi , Saitama 322-0012 , Japan.,National Institute of Advanced Industrial Science and Technology , 16-1 Onogawa , Tsukuba , Ibaraki 305-8569 , Japan
| | - Kei Ohkubo
- Department of Chemistry , Graduate School of Science and Engineering , Tokyo Institute of Technology , 2-12-1-NE1, O-okayama , Meguro-ku , Tokyo 152-8550 , Japan .
| | - Osamu Ishitani
- Department of Chemistry , Graduate School of Science and Engineering , Tokyo Institute of Technology , 2-12-1-NE1, O-okayama , Meguro-ku , Tokyo 152-8550 , Japan . .,CREST , Japan Science and Technology Agency , 4-1-8 Honcho , Kawaguchi-shi , Saitama 322-0012 , Japan
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72
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Windle CD, Pastor E, Reynal A, Whitwood AC, Vaynzof Y, Durrant JR, Perutz RN, Reisner E. Improving the photocatalytic reduction of CO2 to CO through immobilisation of a molecular Re catalyst on TiO2. Chemistry 2015; 21:3746-54. [PMID: 25639778 PMCID: PMC4471553 DOI: 10.1002/chem.201405041] [Citation(s) in RCA: 105] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2014] [Indexed: 11/16/2022]
Abstract
The photocatalytic activity of phosphonated Re complexes, [Re(2,2'-bipyridine-4,4'-bisphosphonic acid) (CO)3(L)] (ReP; L = 3-picoline or bromide) immobilised on TiO2 nanoparticles is reported. The heterogenised Re catalyst on the semiconductor, ReP-TiO2 hybrid, displays an improvement in CO2 reduction photocatalysis. A high turnover number (TON) of 48 molCO molRe(-1) is observed in DMF with the electron donor triethanolamine at λ>420 nm. ReP-TiO2 compares favourably to previously reported homogeneous systems and is the highest TON reported to date for a CO2-reducing Re photocatalyst under visible light irradiation. Photocatalytic CO2 reduction is even observed with ReP-TiO2 at wavelengths of λ>495 nm. Infrared and X-ray photoelectron spectroscopies confirm that an intact ReP catalyst is present on the TiO2 surface before and during catalysis. Transient absorption spectroscopy suggests that the high activity upon heterogenisation is due to an increase in the lifetime of the immobilised anionic Re intermediate (t50% >1 s for ReP-TiO2 compared with t50% = 60 ms for ReP in solution) and immobilisation might also reduce the formation of inactive Re dimers. This study demonstrates that the activity of a homogeneous photocatalyst can be improved through immobilisation on a metal oxide surface by favourably modifying its photochemical kinetics.
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Affiliation(s)
- Christopher D Windle
- Christian Doppler Laboratory for Sustainable SynGas Chemistry, Department of Chemistry, University of CambridgeLensfield Road, Cambridge CB2 1EW (U.K.)
- Department of Chemistry, University of YorkHeslington, York YO10 5DD (U.K.)
| | - Ernest Pastor
- Department of Chemistry, Imperial College LondonExhibition Road, London SW7 2AZ (U.K.)
| | - Anna Reynal
- Department of Chemistry, Imperial College LondonExhibition Road, London SW7 2AZ (U.K.)
| | - Adrian C Whitwood
- Department of Chemistry, University of YorkHeslington, York YO10 5DD (U.K.)
| | - Yana Vaynzof
- Cavendish Laboratory, University of CambridgeCambridge, CB3 0HE, U.K.
| | - James R Durrant
- Department of Chemistry, Imperial College LondonExhibition Road, London SW7 2AZ (U.K.)
| | - Robin N Perutz
- Department of Chemistry, University of YorkHeslington, York YO10 5DD (U.K.)
| | - Erwin Reisner
- Christian Doppler Laboratory for Sustainable SynGas Chemistry, Department of Chemistry, University of CambridgeLensfield Road, Cambridge CB2 1EW (U.K.)
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73
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Sato S, Arai T, Morikawa T. Toward Solar-Driven Photocatalytic CO2 Reduction Using Water as an Electron Donor. Inorg Chem 2015; 54:5105-13. [DOI: 10.1021/ic502766g] [Citation(s) in RCA: 103] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Shunsuke Sato
- Toyota Central Research and Development Laboratories, Inc., Nagakute, Aichi 480-1192, Japan
- PRESTO, Japan Science and Technology Agency, 4-1-8 Honcho, Kawaguchi-shi, Saitama 332-0012, Japan
| | - Takeo Arai
- Toyota Central Research and Development Laboratories, Inc., Nagakute, Aichi 480-1192, Japan
| | - Takeshi Morikawa
- Toyota Central Research and Development Laboratories, Inc., Nagakute, Aichi 480-1192, Japan
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74
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Hasegawa E, Arai S, Tayama E, Iwamoto H. Metal-free, one-pot, sequential protocol for transforming α,β-epoxy ketones to β-hydroxy ketones and α-methylene ketones. J Org Chem 2015; 80:1593-600. [PMID: 25562397 DOI: 10.1021/jo5025249] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
A new sequential, one-pot protocol for transforming 1,3-disubstituted 2,3-epoxy ketones to β-hydroxy ketones and α-methylene ketones has been developed. Reaction of epoxy ketones with boron trifluoride etherate (BF3·OEt2) generates the cationic intermediates by regioselective epoxide ring opening and an acyl shift. Then, a treatment of these cations with 2-aryl-1,3-dimethylbenzimidazolines (DMBIH) results in formation of 1,2-disubstituted 3-hydroxy ketones. DMBIH serves as a hydride donor in the second step of this process. Finally, the β-hydroxy ketones can be converted to 1,2-disubstituted 2-methylene ketones by treatment with methanesulfonic acid or a combination of methanesulfonyl chloride and triethylamine. Importantly, the sequential steps involved in formation of the α-methylene ketone products can be carried out in one pot.
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Affiliation(s)
- Eietsu Hasegawa
- Department of Chemistry, Faculty of Science, Niigata University , Ikarashi-2 8050, Niigata 950-2181, Japan
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75
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Affiliation(s)
- Go Sahara
- Department of Chemistry, Graduate School of Science and
Engineering, Tokyo Institute of Technology, 2-12-1-NE-1, Ookayama, Meguro-ku, Tokyo 152-8550, Japan
| | - Osamu Ishitani
- Department of Chemistry, Graduate School of Science and
Engineering, Tokyo Institute of Technology, 2-12-1-NE-1, Ookayama, Meguro-ku, Tokyo 152-8550, Japan
- CREST, Japan Science and Technology Agency, 4-1-8 Honcho, Kawaguchi-shi, Saitama 322-0012, Japan
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76
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Rousset E, Chartrand D, Ciofini I, Marvaud V, Hanan GS. Red-light-driven photocatalytic hydrogen evolution using a ruthenium quaterpyridine complex. Chem Commun (Camb) 2015; 51:9261-4. [DOI: 10.1039/c5cc02124c] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The ruthenium tris-quaterpyridine complex, obtained in quantitative yield, is an excellent photosensitiser for photocatalytic hydrogen production, especially under red-light irradiation.
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Affiliation(s)
- E. Rousset
- Département de Chimie
- Université de Montréal
- Montréal
- Canada
- IPCM-CNRS UMR 8232
| | - D. Chartrand
- Département de Chimie
- Université de Montréal
- Montréal
- Canada
| | - I. Ciofini
- Laboratoire d'Electrochimie
- Chimie des Interfaces Modélisation pour l'Energie
- UMR CNRS-ENSCP-7575
- École Nationale Supérieure de Chimie de Paris
- Chimie ParisTech
| | - V. Marvaud
- IPCM-CNRS UMR 8232
- UPMC-Univ Paris 6
- 75252 Paris Cedex 05
- France
| | - G. S. Hanan
- Département de Chimie
- Université de Montréal
- Montréal
- Canada
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77
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Ramdass A, Sathish V, Velayudham M, Thanasekaran P, Umapathy S, Rajagopal S. Synthesis and characterization of monometallic rhenium(i) complexes and their application as selective sensors for copper(ii) ions. RSC Adv 2015. [DOI: 10.1039/c5ra03157e] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Monometallic Re(i) complexes, selective and sensitive sensor of Cu(ii) ion, show substantial enhancement in the emission intensity, quantum yield, and lifetime due to the restriction of CN isomerization.
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Affiliation(s)
- Arumugam Ramdass
- School of Chemistry
- Madurai Kamaraj University
- Madurai-625 021
- India
| | | | - Murugesan Velayudham
- Department of Inorganic and Physical Chemistry
- Indian Institute of Science
- Bangalore-560 012
- India
| | | | - Siva Umapathy
- Department of Inorganic and Physical Chemistry
- Indian Institute of Science
- Bangalore-560 012
- India
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78
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Franco F, Cometto C, Garino C, Minero C, Sordello F, Nervi C, Gobetto R. Photo- and Electrocatalytic Reduction of CO2by [Re(CO)3{α,α′-Diimine-(4-piperidinyl-1,8-naphthalimide)}Cl] Complexes. Eur J Inorg Chem 2014. [DOI: 10.1002/ejic.201402912] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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79
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Schallenberg D, Neubauer A, Erdmann E, Tänzler M, Villinger A, Lochbrunner S, Seidel WW. Dinuclear Ru/Ni, Ir/Ni, and Ir/Pt Complexes with Bridging Phenanthroline-5,6-dithiolate: Synthesis, Structure, and Electrochemical and Photophysical Behavior. Inorg Chem 2014; 53:8859-73. [DOI: 10.1021/ic4031206] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- David Schallenberg
- Institut für Chemie, Universität Rostock, Albert-Einstein-Straße 3a, 18059 Rostock, Germany
| | - Antje Neubauer
- Institut für Physik, Universität Rostock, Universitätsplatz 3, 18051 Rostock, Germany
| | - Elisa Erdmann
- Institut für Chemie, Universität Rostock, Albert-Einstein-Straße 3a, 18059 Rostock, Germany
| | - Marco Tänzler
- Institut für Chemie, Universität Rostock, Albert-Einstein-Straße 3a, 18059 Rostock, Germany
| | - Alexander Villinger
- Institut für Chemie, Universität Rostock, Albert-Einstein-Straße 3a, 18059 Rostock, Germany
| | - Stefan Lochbrunner
- Institut für Physik, Universität Rostock, Universitätsplatz 3, 18051 Rostock, Germany
| | - Wolfram W. Seidel
- Institut für Chemie, Universität Rostock, Albert-Einstein-Straße 3a, 18059 Rostock, Germany
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80
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Kitagawa Y, Takeda H, Ohashi K, Asatani T, Kosumi D, Hashimoto H, Ishitani O, Tamiaki H. Photochemical Reduction of CO2 with Red Light Using Synthetic Chlorophyll–Rhenium Bipyridine Dyad. CHEM LETT 2014. [DOI: 10.1246/cl.140439] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
| | - Hiroyuki Takeda
- Graduate School of Science and Engineering, Tokyo Institute of Technology
| | - Kenji Ohashi
- Graduate School of Science and Engineering, Tokyo Institute of Technology
| | - Tsuyoshi Asatani
- Graduate School of Science and Engineering, Tokyo Institute of Technology
| | - Daisuke Kosumi
- Department of Physics, Graduate School of Science, Osaka City University
| | - Hideki Hashimoto
- Department of Physics, Graduate School of Science, Osaka City University
| | - Osamu Ishitani
- Graduate School of Science and Engineering, Tokyo Institute of Technology
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81
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Portenkirchner E, Kianfar E, Sariciftci NS, Knör G. Two-electron carbon dioxide reduction catalyzed by rhenium(I) bis(imino)acenaphthene carbonyl complexes. CHEMSUSCHEM 2014; 7:1347-51. [PMID: 24737649 PMCID: PMC4498476 DOI: 10.1002/cssc.201301116] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/18/2013] [Revised: 01/14/2014] [Indexed: 06/03/2023]
Abstract
Rhenium(I) carbonyl complexes carrying substituted bis(arylimino)acenaphthene ligands (BIAN-R) have been tested as potential catalysts for the two-electron reduction of carbon dioxide. Cyclic voltammetric studies as well as controlled potential electrolysis experiments were performed using CO2-saturated solutions of the complexes in acetonitrile and acetonitrile-water mixtures. Faradaic efficiencies of more than 30 % have been determined for the electrocatalytic production of CO. The effects of ligand substitution patterns and water content of the reaction medium on the catalytic performance of the new catalysts are discussed.
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Affiliation(s)
| | - Elham Kianfar
- Institute of Inorganic Chemistry, Johannes Kepler University Linz (JKU)4040 Linz (Austria) E-mail:
| | | | - Günther Knör
- Institute of Inorganic Chemistry, Johannes Kepler University Linz (JKU)4040 Linz (Austria) E-mail:
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82
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Kuramochi Y, Kamiya M, Ishida H. Photocatalytic CO2 Reduction in N,N-Dimethylacetamide/Water as an Alternative Solvent System. Inorg Chem 2014; 53:3326-32. [DOI: 10.1021/ic500050q] [Citation(s) in RCA: 82] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Yusuke Kuramochi
- Department of Chemistry, Graduate School of Science, Kitasato University, 1-15-1 Kitasato, Minami-ku, Sagamihara, Kanagawa 252-0373, Japan
| | - Masaya Kamiya
- Department of Chemistry, Graduate School of Science, Kitasato University, 1-15-1 Kitasato, Minami-ku, Sagamihara, Kanagawa 252-0373, Japan
| | - Hitoshi Ishida
- Department of Chemistry, Graduate School of Science, Kitasato University, 1-15-1 Kitasato, Minami-ku, Sagamihara, Kanagawa 252-0373, Japan
- Precursory Research for Embryonic Science
(PRESTO), Japan Science and Technology Agency (JST), 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan
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83
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Sahara G, Ishitani O. ELECTROCHEMISTRY 2014; 82:497-501. [DOI: 10.5796/electrochemistry.82.497] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] Open
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