51
|
Fenton TG, Louis ME, Li G. Effect of ligand derivatization at different positions on photochemical properties of hybrid Re(I) photocatalysts. ACTA ACUST UNITED AC 2016. [DOI: 10.1016/j.molcata.2015.10.034] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
52
|
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]
|
53
|
Emission amplification of Ru(bpy)32+ via energy transfer from pyrene derivatives on synthesized clay. J Photochem Photobiol A Chem 2015. [DOI: 10.1016/j.jphotochem.2015.05.015] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
54
|
Windle CD, George MW, Perutz RN, Summers PA, Sun XZ, Whitwood AC. Comparison of rhenium-porphyrin dyads for CO 2 photoreduction: photocatalytic studies and charge separation dynamics studied by time-resolved IR spectroscopy. Chem Sci 2015; 6:6847-6864. [PMID: 29861927 PMCID: PMC5947513 DOI: 10.1039/c5sc02099a] [Citation(s) in RCA: 57] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2015] [Accepted: 08/18/2015] [Indexed: 01/08/2023] Open
Abstract
We report a study of the photocatalytic reduction of CO2 to CO by zinc porphyrins covalently linked to [ReI(2,2'-bipyridine)(CO)3L]+/0 moieties with visible light of wavelength >520 nm. Dyad 1 contains an amide C6H4NHC(O) link from porphyrin to bipyridine (Bpy), Dyad 2 contains an additional methoxybenzamide within the bridge C6H4NHC(O)C6H3(OMe)NHC(O), while Dyad 3 has a saturated bridge C6H4NHC(O)CH2; each dyad is studied with either L = Br or 3-picoline. The syntheses, spectroscopic characterisation and cyclic voltammetry of Dyad 3 Br and [Dyad 3 pic]OTf are described. The photocatalytic performance of [Dyad 3 pic]OTf in DMF/triethanolamine (5 : 1) is approximately an order of magnitude better than [Dyad 1 pic]PF6 or [Dyad 2 pic]OTf in turnover frequency and turnover number, reaching a turnover number of 360. The performance of the dyads with Re-Br units is very similar to that of the dyads with [Re-pic]+ units in spite of the adverse free energy of electron transfer. The dyads undergo reactions during photocatalysis: hydrogenation of the porphyrin to form chlorin and isobacteriochlorin units is detected by visible absorption spectroscopy, while IR spectroscopy reveals replacement of the axial ligand by a triethanolaminato group and insertion of CO2 into the latter to form a carbonate. Time-resolved IR spectra of [Dyad 2 pic]OTf and [Dyad 3 pic]OTf (560 nm excitation in CH2Cl2) demonstrated electron transfer from porphyrin to Re(Bpy) units resulting in a shift of ν(CO) bands to low wavenumbers. The rise time of the charge-separated species for [Dyad 3 pic]OTf is longest at 8 (±1) ps and its lifetime is also the longest at 320 (±15) ps. The TRIR spectra of Dyad 1 Br and Dyad 2 Br are quite different showing a mixture of 3MLCT, IL and charge-separated excited states. In the case of Dyad 3 Br, the charge-separated state is absent altogether. The TRIR spectra emphasize the very different excited states of the bromide complexes and the picoline complexes. Thus, the similarity of the photocatalytic data for bromide and picoline dyads suggests that they share common intermediates. Most likely, these involve hydrogenation of the porphyrin and substitution of the axial ligand at rhenium.
Collapse
Affiliation(s)
- Christopher D Windle
- Department of Chemistry , University of York , Heslington , York , YO10 5DD , UK .
| | - Michael W George
- School of Chemistry , University of Nottingham , Nottingham , NG7 2RD , UK .
- Department of Chemical and Environmental Engineering , The University of Nottingham Ningbo China , Ningbo , 315100 , China
| | - Robin N Perutz
- Department of Chemistry , University of York , Heslington , York , YO10 5DD , UK .
| | - Peter A Summers
- School of Chemistry , University of Nottingham , Nottingham , NG7 2RD , UK .
- Department of Chemical and Environmental Engineering , The University of Nottingham Ningbo China , Ningbo , 315100 , China
| | - Xue Zhong Sun
- School of Chemistry , University of Nottingham , Nottingham , NG7 2RD , UK .
| | - Adrian C Whitwood
- Department of Chemistry , University of York , Heslington , York , YO10 5DD , UK .
| |
Collapse
|
55
|
Ohashi K, Takeda H, Koike K, Ishitani O. Synthesis and strong photooxidation power of a supramolecular hybrid comprising a polyoxometalate and Ru(II) polypyridyl complex with zinc(II). Faraday Discuss 2015; 185:171-85. [PMID: 26426436 DOI: 10.1039/c5fd00080g] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel method for constructing supramolecular hybrids composed of polyoxometalates and photofunctional metal complexes was developed. A Ru(II) complex with phosphonate groups (RuP) strongly interacted with Zn(II) to afford a 2 : 1 trinuclear metal complex ([(RuP)2Zn](3+)). In dimethylsulfoxide, [(RuP)2Zn](3+) strongly interacted with a Keggin-type heteropolyoxometalate (Si-WPOM) to form a 1 : 1 hybrid ([(RuP)2Zn]-POM). Irradiation of [(RuP)2Zn]-POM in the presence of diethanolamine caused rapid accumulation of the one-electron reduced hybrid with a quantum yield of 0.99.
Collapse
Affiliation(s)
- Kenji Ohashi
- Department of Chemistry, Graduate School of Science and Engineering, Tokyo Institute of Technology, Ookayama 2-12-1-NE-1, Meguro-ku, Tokyo 152-8551, Japan.
| | | | | | | |
Collapse
|
56
|
Louis ME, Fenton TG, Rondeau J, Jin T, Li G. Solar CO2Reduction Using Surface-Immobilized Molecular Catalysts. COMMENT INORG CHEM 2015. [DOI: 10.1080/02603594.2015.1088008] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
57
|
Sahara G, Abe R, Higashi M, Morikawa T, Maeda K, Ueda Y, Ishitani O. Photoelectrochemical CO2 reduction using a Ru(ii)–Re(i) multinuclear metal complex on a p-type semiconducting NiO electrode. Chem Commun (Camb) 2015; 51:10722-5. [DOI: 10.1039/c5cc02403j] [Citation(s) in RCA: 118] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
A photocathode for CO2 reduction was developed using a hybrid comprising a Ru(ii)–Re(i) supramolecular photocatalyst and a NiO electrode. Photoexcitation of the Ru photosensitizer selectively gave CO with high faradaic efficiency.
Collapse
Affiliation(s)
- Go Sahara
- Department of Chemistry
- Graduate School of Science and Engineering
- Tokyo Institute of Technology
- Tokyo 152-8550
- Japan
| | - Ryu Abe
- Department of Energy and Hydrocarbon Chemistry
- Graduate School of Engineering
- Kyoto University
- Kyoto 615-8510
- Japan
| | - Masanobu Higashi
- Department of Energy and Hydrocarbon Chemistry
- Graduate School of Engineering
- Kyoto University
- Kyoto 615-8510
- Japan
| | - Takeshi Morikawa
- Toyota Central Research and Development Laboratories, Inc
- Nagakute
- Japan
| | - Kazuhiko Maeda
- Department of Chemistry
- Graduate School of Science and Engineering
- Tokyo Institute of Technology
- Tokyo 152-8550
- Japan
| | - Yutaro Ueda
- Department of Chemistry
- Graduate School of Science and Engineering
- Tokyo Institute of Technology
- Tokyo 152-8550
- Japan
| | - Osamu Ishitani
- Department of Chemistry
- Graduate School of Science and Engineering
- Tokyo Institute of Technology
- Tokyo 152-8550
- Japan
| |
Collapse
|
58
|
Wahab MA, Beltramini JN. Recent advances in hybrid periodic mesostructured organosilica materials: opportunities from fundamental to biomedical applications. RSC Adv 2015. [DOI: 10.1039/c5ra10062c] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Periodic mesoporous organosilica nanostructures functionalized with various active functional groups: from design to biomedical applications.
Collapse
Affiliation(s)
- Mohammad A. Wahab
- Nanomaterials Centre
- Australian Institute for Bioengineering and Nanotechnology
- The University of Queensland
- Brisbane
- Australia
| | - Jorge N. Beltramini
- Nanomaterials Centre
- Australian Institute for Bioengineering and Nanotechnology
- The University of Queensland
- Brisbane
- Australia
| |
Collapse
|