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Kimura H, Nagasato N, Kato N, Kojima M, Enomoto C, Nakata E, Takashima H. Photophysical and elecron-transfer reaction properties of tris(2,2’-bipyridine)ruthenium(II)-based inhibitors that covalently bound to the active site of chymotrypsin. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY 2021. [DOI: 10.1016/j.jpap.2021.100027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
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2
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Recent advances in photoinduced catalysis for water splitting and environmental applications. J IND ENG CHEM 2019. [DOI: 10.1016/j.jiec.2019.01.004] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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3
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Suwa M, Imamura N, Awano P, Nakata E, Takashima H. Photoinduced electron-transfer reactions of tris(2,2′-bipyridine)ruthenium(II)-based carbonic anhydrase inhibitors tethering plural binding sites. J PHYS ORG CHEM 2018. [DOI: 10.1002/poc.3848] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Mikiko Suwa
- Department of Chemistry, Faculty of Science; Nara Women's University; Nara Japan
| | - Narumi Imamura
- Department of Chemistry, Faculty of Science; Nara Women's University; Nara Japan
| | - Pirika Awano
- Department of Chemistry, Faculty of Science; Nara Women's University; Nara Japan
| | - Eiji Nakata
- Institute of Advanced Energy; Kyoto University; Kyoto Japan
| | - Hiroshi Takashima
- Department of Chemistry, Faculty of Science; Nara Women's University; Nara Japan
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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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Aute S, Maity P, Das A, Ghosh HN. Demonstrating the role of anchoring functionality in interfacial electron transfer dynamics in the newly synthesized BODIPY–TiO2 nanostructure composite. NEW J CHEM 2017. [DOI: 10.1039/c7nj00668c] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Scheme illustrating the extent of coupling and charge recombination dynamics between BODIPY and NS-TiO2 anchoring through the catechol and resorcinol binding group.
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Affiliation(s)
- Sunil Aute
- Organic Chemistry Division CSIR-National Chemical Laboratory Pune
- Maharashtra
- India
| | - Partha Maity
- Radiation & Photochemistry Division
- Bhabha Atomic Research Centre
- Mumbai-400085
- India
| | - Amitava Das
- Organic Chemistry Division CSIR-National Chemical Laboratory Pune
- Maharashtra
- India
- CSIR-Central Salt & Marine Chemicals Research Institute
- Bhavnagar-364002
| | - Hirendra N. Ghosh
- Radiation & Photochemistry Division
- Bhabha Atomic Research Centre
- Mumbai-400085
- India
- Institute of Nano Science & Technology
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Banerjee T, Biswas AK, Sahu TS, Ganguly B, Das A, Ghosh HN. New Ru(ii)/Os(ii)-polypyridyl complexes for coupling to TiO2 surfaces through acetylacetone functionality and studies on interfacial electron-transfer dynamics. Dalton Trans 2014; 43:13601-11. [DOI: 10.1039/c4dt01571a] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Extremely fast electron injection rates are observed with newly synthesized acac bound Ru(ii)-/Os(ii)-polypyridyl dyes.
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Affiliation(s)
- Tanmay Banerjee
- CSIR-National Chemical Laboratory
- Pune 411008, India
- Academy of Scientific and Innovative Research
- CSIR-National Chemical Laboratory
- Pune 411008, India
| | - Abul Kalam Biswas
- CSIR-Central Salt and Marine Chemicals Research Institute
- Bhavnagar 364002, India
- Academy of Scientific and Innovative Research
- CSIR-Central Salt and Marine Chemicals Research Institute
- Bhavnagar, India
| | - Tuhin Subhra Sahu
- CSIR-Central Salt and Marine Chemicals Research Institute
- Bhavnagar 364002, India
| | - Bishwajit Ganguly
- CSIR-Central Salt and Marine Chemicals Research Institute
- Bhavnagar 364002, India
- Academy of Scientific and Innovative Research
- CSIR-Central Salt and Marine Chemicals Research Institute
- Bhavnagar, India
| | - Amitava Das
- CSIR-National Chemical Laboratory
- Pune 411008, India
- Academy of Scientific and Innovative Research
- CSIR-National Chemical Laboratory
- Pune 411008, India
| | - Hirendra Nath Ghosh
- Radiation and Photochemistry Division
- Bhabha Atomic Research Centre
- Mumbai, India
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Karidi K, Ypsilantis K, Papakyriakou A, Garoufis A. Synthesis and characterization of ruthenium(II)-oligopyridine-peptide conjugates. Interactions of the diasteromeres Δ- and Λ-[Ru(bpy)2(4-COY-4'-Mebpy)]Cl2 (Y=Gly-Lys(1)-Lys(2)CONH2, Lys(1)-Gly-Lys(2)CONH2, Lys(1)-Lys(2)-GlyCONH2) with the oligonucleotide d(5'-CGCGAATTCGCG-3')2. J Inorg Biochem 2013; 127:13-23. [PMID: 23838117 DOI: 10.1016/j.jinorgbio.2013.06.010] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2013] [Revised: 06/16/2013] [Accepted: 06/17/2013] [Indexed: 01/12/2023]
Abstract
Diastereomeric complexes of the general formulae Λ- and Δ-[Ru(bpy)2(4-COY-4'-Mebpy)]Cl2 where bpy=2,2'-bipyridine and Y=Gly-Lys(1)-Lys(2)CONH2, Lys(1)-Gly-Lys(2)CONH2, Lys(1)-Lys(2)-GlyCONH2, were synthesized and characterized. The ability of these compounds to bind to the oligonucleotide duplex d(5'-CGCGAATTCGCG-3') was studied with NMR techniques. Complex Λ-2, Λ-[Ru(bpy)2(4-COLys(1)-Gly-Lys(2)CONH2),4'-Mebpy)]Cl2 (Mebpy=methyl-2,2'-bipyridine), interacts non-specifically causing changes for both complex and oligonucleotide (1)H NMR signals. Both Λ-1, Λ-[Ru(bpy)2(4-COGly-Lys(1)-Lys(2)CONH2),4'-Mebpy)]Cl2 and Λ-3, Λ-[Ru(bpy)2(4-COLys(1)-Lys(2)-GlyCONH2),4'-Mebpy)]Cl2, were bound to the oligonucleotide through both lysine aliphatic chains, indicating that the side chains of the sequential lysines create a kind of "clamp" to connect the complex with the oligonucleotide. Complex Δ-1, Δ-[Ru(bpy)2(4-COGly-Lys(1)-Lys(2)CONH2),4'-Mebpy)]Cl2, interacts with the oligonucleotide duplex with both lysine side chains in a manner similar to Λ-1. Δ-2, Δ-[Ru(bpy)2(4-COLys(1)-Gly-Lys(2)CONH2),4'-Mebpy)]Cl2, interacts with the oligonucleotide with the bipyridine ligands. In addition, the formation of a hydrogen bond between the Gly-NH and the carbonyl groups of the oligonucleotide bases was detected. A completely different binding mode was observed for Δ-3 Δ-[Ru(bpy)2(4-COLys(1)-Lys(2)-GlyCONH2),4'-Mebpy)]Cl2, which at a ratio of 1:1 ([Ru]/[nucleotide]) opens the oligonucleotide strands. In addition, participation of all three peptidic NH of Δ-3 in hydrogen bonds was observed.
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Affiliation(s)
- Konstantina Karidi
- Laboratory of Inorganic and General Chemistry, Department of Chemistry, University of Ioannina, Ioannina 45110, Greece
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8
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Banerjee T, Kaniyankandy S, Das A, Ghosh HN. Synthesis, Steady-State, and Femtosecond Transient Absorption Studies of Resorcinol Bound Ruthenium(II)- and Osmium(II)-polypyridyl Complexes on Nano-TiO2 Surface in Water. Inorg Chem 2013; 52:5366-77. [DOI: 10.1021/ic4003548] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Tanmay Banerjee
- Central Salt and Marine Chemicals Research Institute, Bhavnagar 364002, India
| | - Sreejith Kaniyankandy
- Radiation and Photochemistry Division, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - Amitava Das
- Central Salt and Marine Chemicals Research Institute, Bhavnagar 364002, India
| | - Hirendra Nath Ghosh
- Radiation and Photochemistry Division, Bhabha Atomic Research Centre, Mumbai 400085, India
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Takashima H, Fukuda M, Nakagaki F, Ogata T, Tsukahara K. Photoinduced Electron-Transfer Reactions of Carbonic Anhydrase Inhibitor Containing Tris(2,2′-bipyridine)ruthenium(II) Analogue. J Phys Chem B 2013; 117:2625-35. [DOI: 10.1021/jp310604w] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Hiroshi Takashima
- Department of Chemistry, Faculty of Science, Nara Women’s University, Nara 630-8506, Japan
| | - Misa Fukuda
- Department of Chemistry, Faculty of Science, Nara Women’s University, Nara 630-8506, Japan
| | - Fumie Nakagaki
- Department of Chemistry, Faculty of Science, Nara Women’s University, Nara 630-8506, Japan
| | - Tomoko Ogata
- Department of Chemistry, Faculty of Science, Nara Women’s University, Nara 630-8506, Japan
| | - Keiichi Tsukahara
- Department of Chemistry, Faculty of Science, Nara Women’s University, Nara 630-8506, Japan
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Banerjee T, Das A, Ghosh HN. Interfacial charge recombination of Os(ii)–polypyridyl–resorcinol complex on oleic acid capped TiO2 surface: what determines the dynamics? NEW J CHEM 2013. [DOI: 10.1039/c3nj00550j] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Swierk JR, Mallouk TE. Design and development of photoanodes for water-splitting dye-sensitized photoelectrochemical cells. Chem Soc Rev 2013; 42:2357-87. [DOI: 10.1039/c2cs35246j] [Citation(s) in RCA: 453] [Impact Index Per Article: 41.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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12
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Artero V, Fontecave M. Light-driven bioinspired water splitting: Recent developments in photoelectrode materials. CR CHIM 2011. [DOI: 10.1016/j.crci.2011.06.004] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Banerjee T, Rawalekar S, Das A, Ghosh HN. Interfacial Electron Transfer Dynamics of Two Newly Synthesized Catecholate Bound RuII Polypyridyl-Based Sensitizers on TiO2 Nanoparticle Surface - A Femtosecond Pump Probe Spectroscopic Study. Eur J Inorg Chem 2011. [DOI: 10.1002/ejic.201100411] [Citation(s) in RCA: 24] [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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14
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Blanco-Rodríguez AM, Towrie M, Sýkora J, Záliš S, Vlček A. Photoinduced Intramolecular Tryptophan Oxidation and Excited-State Behavior of [Re(L-AA)(CO)3(α-diimine)]+ (L = Pyridine or Imidazole, AA = Tryptophan, Tyrosine, Phenylalanine). Inorg Chem 2011; 50:6122-34. [DOI: 10.1021/ic200252z] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ana María Blanco-Rodríguez
- School of Biological and Chemical Sciences, Queen Mary University of London, Mile End Road, London E1 4NS, United Kingdom
| | - Mike Towrie
- Central Laser Facility, Research Complex at Harwell, STFC, Rutherford Appleton Laboratory, Harwell Oxford, Didcot, Oxfordshire OX11 0QX, United Kingdom
| | - J. Sýkora
- J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, Dolejškova 3, CZ-182 23 Prague, Czech Republic
| | - Stanislav Záliš
- J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, Dolejškova 3, CZ-182 23 Prague, Czech Republic
| | - Antonín Vlček
- School of Biological and Chemical Sciences, Queen Mary University of London, Mile End Road, London E1 4NS, United Kingdom
- J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, Dolejškova 3, CZ-182 23 Prague, Czech Republic
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Triantafillidi K, Karidi K, Malina J, Garoufis A. Oligopyridine-ruthenium(II)-amino acid conjugates: synthesis, characterization, DNA binding properties and interactions with the oligonucleotide duplex d(5'-CGCGCG-3')2. Dalton Trans 2009:6403-15. [PMID: 19655075 DOI: 10.1039/b904951g] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Diastereomeric oligopyridine-ruthenium(II)-amino acid conjugated complexes of the general formulas Lambda- and Delta-[Ru(bpy)(2)(4,4'(CO(2)Y)(2)-bpy)](2+), where Y = L-AlaCONH(2), L-LysCONH(2), L-HisCONH(2), L-TyrCONH(2)), were synthesized and characterized. Their binding properties with ct-DNA and the oligonucleotide duplex d(5'CGCGCG-3')(2), by means of circular dichroism (CD), NMR spectroscopy and DNA thermal denaturation (T(m)) curves were studied. CD and T(m) data indicate that all diastereomeric complexes bind to the DNA major groove, Delta-diastereomers in a similar manner, while Lambda-diastereomers in dependence of the nature of the amino acid. NMR studies of d(5'CGCGCG-3')(2), and the complexes Delta-1, Delta-2, Lambda-1 and Lambda-2 indicate that Delta-1 and Delta-2 were bound having the ancillary bpy ligands towards the DNA groove, while the corresponding Lambda-1 and Lambda-2 were orientated in a similar way, facing the ligand 4,4'(CO(2)Y)(2)bpy towards the DNA major groove. Photoinduced DNA cleavage was observed in all cases studied, which take place through singlet oxygen production. Delta-4 and Lambda-4 show the lower photoinduced cleavage yield, probably because the singlet oxygen ((1)O(2)) oxidizes not only the DNA phosporodiesteric bonds but the tyrosine's phenolic OH bond as well.
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Affiliation(s)
- Katelitsa Triantafillidi
- Laboratory of Inorganic Chemistry, Department of Chemistry, University of Ioannina, Ioannina 45110, Greece
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Herek JL, Polívka T, Grondelle RV, Pullerits T. Excited state dynamics in light harvesting materials (in honor of Villy Sundström). Chem Phys 2009. [DOI: 10.1016/j.chemphys.2009.01.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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17
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Sun S, Zhang R, Andersson S, Pan J, Zou D, Åkermark B, Sun L. Host−Guest Chemistry and Light Driven Molecular Lock of Ru(bpy)3−Viologen with Cucurbit[7−8]urils. J Phys Chem B 2007; 111:13357-63. [DOI: 10.1021/jp074582j] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Shiguo Sun
- School of Chemical Science and Engineering, Organic Chemistry, Royal Institute of Technology (KTH), 100 44 Stockholm, Sweden, State Key Laboratory of Fine Chemicals, DUT-KTH Joint Education and Research Center on Molecular Devices, Dalian University of Technology (DUT), 116012 Dalian, China, and Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, 106 91 Stockholm, Sweden
| | - Rong Zhang
- School of Chemical Science and Engineering, Organic Chemistry, Royal Institute of Technology (KTH), 100 44 Stockholm, Sweden, State Key Laboratory of Fine Chemicals, DUT-KTH Joint Education and Research Center on Molecular Devices, Dalian University of Technology (DUT), 116012 Dalian, China, and Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, 106 91 Stockholm, Sweden
| | - Samir Andersson
- School of Chemical Science and Engineering, Organic Chemistry, Royal Institute of Technology (KTH), 100 44 Stockholm, Sweden, State Key Laboratory of Fine Chemicals, DUT-KTH Joint Education and Research Center on Molecular Devices, Dalian University of Technology (DUT), 116012 Dalian, China, and Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, 106 91 Stockholm, Sweden
| | - Jingxi Pan
- School of Chemical Science and Engineering, Organic Chemistry, Royal Institute of Technology (KTH), 100 44 Stockholm, Sweden, State Key Laboratory of Fine Chemicals, DUT-KTH Joint Education and Research Center on Molecular Devices, Dalian University of Technology (DUT), 116012 Dalian, China, and Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, 106 91 Stockholm, Sweden
| | - Dapeng Zou
- School of Chemical Science and Engineering, Organic Chemistry, Royal Institute of Technology (KTH), 100 44 Stockholm, Sweden, State Key Laboratory of Fine Chemicals, DUT-KTH Joint Education and Research Center on Molecular Devices, Dalian University of Technology (DUT), 116012 Dalian, China, and Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, 106 91 Stockholm, Sweden
| | - Björn Åkermark
- School of Chemical Science and Engineering, Organic Chemistry, Royal Institute of Technology (KTH), 100 44 Stockholm, Sweden, State Key Laboratory of Fine Chemicals, DUT-KTH Joint Education and Research Center on Molecular Devices, Dalian University of Technology (DUT), 116012 Dalian, China, and Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, 106 91 Stockholm, Sweden
| | - Licheng Sun
- School of Chemical Science and Engineering, Organic Chemistry, Royal Institute of Technology (KTH), 100 44 Stockholm, Sweden, State Key Laboratory of Fine Chemicals, DUT-KTH Joint Education and Research Center on Molecular Devices, Dalian University of Technology (DUT), 116012 Dalian, China, and Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, 106 91 Stockholm, Sweden
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Synthesis, electrochemical, and photophysical studies of multicomponent systems based on porphyrin and ruthenium(II) polypyridine complexes. Tetrahedron 2007. [DOI: 10.1016/j.tet.2007.06.074] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Xu Y, Sun S, Fan J, Peng X. Tyrosine groups enhance photoinduced intramolecular electron transfer in polypyridyl ruthenium(II) complexes. J Photochem Photobiol A Chem 2007. [DOI: 10.1016/j.jphotochem.2006.12.029] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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20
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Liu X, Liu J, Pan J, Chen R, Na Y, Gao W, Sun L. A novel ruthenium(II) tris(bipyridine)–zinc porphyrin–rhenium carbonyl triad: synthesis and optical properties. Tetrahedron 2006. [DOI: 10.1016/j.tet.2006.01.072] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Xu Y, Eilers G, Borgström M, Pan J, Abrahamsson M, Magnuson A, Lomoth R, Bergquist J, Polívka T, Sun L, Sundström V, Styring S, Hammarström L, Akermark B. Synthesis and Characterization of Dinuclear Ruthenium Complexes Covalently Linked to RuII Tris-bipyridine: An Approach to Mimics of the Donor Side of Photosystem II. Chemistry 2005; 11:7305-14. [PMID: 16163754 DOI: 10.1002/chem.200500592] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
To mimic the electron-donor side of photosystem II (PSII), three trinuclear ruthenium complexes (2, 2a, 2b) were synthesized. In these complexes, a mixed-valent dinuclear Ru2(II,III) moiety with one phenoxy and two acetato bridges is covalently linked to a Ru(II) tris-bipyridine photosensitizer. The properties and photoinduced electron/energy transfer of these complexes were studied. The results show that the Ru2(II,III) moieties in the complexes readily undergo reversible one-electron reduction and one-electron oxidation to give the Ru2(II,III) and Ru2(III,III) states, respectively. This could allow for photooxidation of the sensitizer part with an external acceptor and subsequent electron transfer from the dinuclear ruthenium moiety to regenerate the sensitizer. However, all trinuclear ruthenium complexes have a very short excited-state lifetime, in the range of a few nanoseconds to less than 100 ps. Studies by femtosecond time-resolved techniques suggest that a mixture of intramolecular energy and electron transfer between the dinuclear ruthenium moiety and the excited [Ru(bpy)3]2+ photosensitizer is responsible for the short lifetimes. This problem is overcome by anchoring the complexes with ester- or carboxyl-substituted bipyridine ligands (2a, 2b) to nanocrystalline TiO2, and the desired electron transfer from the excited state of the [Ru(bpy)3]2+ moiety to the conduction band of TiO2 followed by intramolecular electron transfer from the dinuclear Ru2(II,III) moiety to photogenerated Ru(III) was observed. The resulting long-lived Ru2(III,III) state decays on the millisecond timescale.
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Affiliation(s)
- Yunhua Xu
- Department of Organic Chemistry, Arrhenius Laboratories, Stockholm University, 106 91 Stockholm, Sweden
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