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Ramesh G, P. RK, Pillegowda M, Periyasamy G, Suchetan PA, Butcher RJ, Foro S, Nagaraju G. Synthesis, crystal structures, photophysical, electrochemical studies, DFT and TD-DFT calculations and Hirshfeld analysis of new 2,2′:6′,2′′-terpyridine ligands with pendant 4′-(trimethoxyphenyl) groups and their homoleptic ruthenium complexes. NEW J CHEM 2020. [DOI: 10.1039/d0nj00046a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
[Ru(L1)2](PF6)2 (1) and [Ru(L2)2](PF6)2 (2): X-ray structures, CH⋯F/O, OH⋯F/N, CH⋯O/π, π⋯π interactions, absorption and emission spectra, DFT/TD-DFT, Hirshfeld analysis.
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Affiliation(s)
- Golla Ramesh
- Department of Studies and Research in Chemistry
- UCS
- Tumkur University
- Tumakuru
- India
| | - Raghavendra Kumar P.
- Department of Studies and Research in Chemistry
- UCS
- Tumkur University
- Tumakuru
- India
| | - Manohar Pillegowda
- Department of Chemistry
- Jnana Bharathi Campus
- Bangalore University
- Bangalore 560 056
- India
| | - Ganga Periyasamy
- Department of Chemistry
- Jnana Bharathi Campus
- Bangalore University
- Bangalore 560 056
- India
| | - P. A. Suchetan
- Department of Studies and Research in Chemistry
- UCS
- Tumkur University
- Tumakuru
- India
| | - R. J. Butcher
- Department of Chemistry
- Howard University
- Washington DC
- USA
| | - Sabine Foro
- Institute of Materials Science
- Darmstadt University of Technology
- Darmstadt
- Germany
| | - G. Nagaraju
- Department of Chemistry
- Siddaganga Institute of Technology
- Tumakuru
- India
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Kumar R, Karlsson S, Streich D, Rolandini Jensen A, Jäger M, Becker HC, Bergquist J, Johansson O, Hammarström L. Vectorial Electron Transfer in Donor-Photosensitizer-Acceptor Triads Based on Novel Bis-tridentate Ruthenium Polypyridyl Complexes. Chemistry 2010; 16:2830-42. [DOI: 10.1002/chem.200902716] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Borgström M, Johansson O, Lomoth R, Baudin HB, Wallin S, Sun L, Akermark B, Hammarström L. Electron donor-acceptor dyads and triads based on tris(bipyridine)ruthenium(II) and benzoquinone: synthesis, characterization, and photoinduced electron transfer reactions. Inorg Chem 2003; 42:5173-84. [PMID: 12924888 DOI: 10.1021/ic020606j] [Citation(s) in RCA: 63] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Two electron donor-acceptor triads based on a benzoquinone acceptor linked to a light absorbing [Ru(bpy)(3)](2+) complex have been synthesized. In triad 6 (denoted Ru(II)-BQ-Co(III)), a [Co(bpy)(3)](3+) complex, a potential secondary acceptor, was linked to the quinone. In the other triad, 8 (denoted PTZ-Ru(II)-BQ), a phenothiazine donor was linked to the ruthenium moiety. The corresponding dyads Ru(II)-BQ (4) and PTZ-Ru(II) (9) were prepared for comparison. Upon light excitation in the visible band of the ruthenium moiety, electron transfer to the quinone occurred with a rate constant k(f) = 5 x 10(9) s(-)(1) (tau(f) = 200 ps) in all the quinone containing complexes. Recombination to the ground state followed, with a rate constant k(b) approximately 4.5 x 10(8) s(-)(1) (tau(b) approximately 2.2 ns), for both Ru(II)-BQ and Ru(II)-BQ-Co(III) with no indication of a charge shift to generate the reduced Co(II) moiety. In the PTZ-Ru(II)-BQ triad, however, the initial charge separation was followed by a rapid (k > 5 x 10(9) s(-)(1)) electron transfer from the phenothiazine moiety to give the fairly long-lived PTZ(*)(+)-Ru(II)-BQ(*)(-) state (tau = 80 ns) in unusually high yield for a [Ru(bpy)(3)](2+)-based triad (> 90%), that lies at DeltaG degrees = 1.32 eV relative to the ground state. Unfortunately, this triad turned out to be rather photolabile. Interestingly, coupling between the oxidized PTZ(*)(+) and the BQ(*)(-) moieties seemed to occur. This discouraged further extension to incorporate more redox active units. Finally, in the dyad PTZ-Ru(II) a reversible, near isoergonic electron transfer was observed on excitation. Thus, a quasiequilibrium was established with an observed time constant of 7 ns, with ca. 82% of the population in the PTZ-Ru(II) state and 18% in the PTZ(*)(+)-Ru(II)(bpy(*)(-)) state. These states decayed in parallel with an observed lifetime of 90 ns. The initial electron transfer to form the PTZ(*)(+)-Ru(II)(bpy(*)(-)) state was thus faster than what would have been inferred from the Ru(II) emission decay (tau = 90 ns). This result suggests that reports for related PTZ-Ru(II) and PTZ-Ru(II)-acceptor complexes in the literature might need to be reconsidered.
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Affiliation(s)
- Magnus Borgström
- Department of Physical Chemistry, BMC, Uppsala University, PO Box 579, SE-751 23 Uppsala, Sweden
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Johansson O, Borgström M, Lomoth R, Palmblad M, Bergquist J, Hammarström L, Sun L, Akermark B. Electron donor-acceptor dyads based on ruthenium(II) bipyridine and terpyridine complexes bound to naphthalenediimide. Inorg Chem 2003; 42:2908-18. [PMID: 12716183 DOI: 10.1021/ic020420k] [Citation(s) in RCA: 99] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Two series of photosensitizer-electron acceptor complexes have been synthesized and fully characterized: ruthenium(II) tris(bipyridine) ([Ru(II)(bpy)(2)(bpy-X-NDI)], where X = -CH(2)-, tolylene, or phenylene, bpy is 2,2'-bipyridine, and NDI is naphthalenediimide) and ruthenium(II) bis(terpyridine) ([Ru(II)(Y-tpy)(tpy-X-NDI)], where Y = H or tolyl and X = tolylene or phenylene, and tpy = 2,2':6',2' '-terpyridine). The complexes have been studied by cyclic and differential pulse voltammetry and by steady state and time-resolved absorption and emission techniques. Rates for forward and backward electron transfer have been investigated, following photoexcitation of the ruthenium(II) polypyridine moiety. The terpyridine complexes were only marginally affected by the linked diimide unit, and no electron transfer was observed. In the bipyridine complexes we achieved efficient charge separation. For the complexes containing a phenyl link between the ruthenium(II) and diimide moieties, our results suggest a biphasic forward electron-transfer reaction, in which 20% of the charge-separated state was formed via population of the naphthalenediimide triplet state.
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Affiliation(s)
- Olof Johansson
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, 106 91 Stockholm, Sweden
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Claude JP, Omberg KM, Williams DS, Meyer TJ. Calculation of Electron Transfer Rate Constants from Emission Spectra in Re(I) Chromophore−Quencher Complexes. J Phys Chem A 2002. [DOI: 10.1021/jp021216l] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Juan Pablo Claude
- Department of Chemistry, CB# 3290, University of North Carolina, Chapel Hill, North Carolina 27599-3290 and Office of the Associate Director for Strategic Research, Mail Stop A127, Los Alamos National Laboratory, Los Alamos, New Mexico 87545
| | - Kristin M. Omberg
- Department of Chemistry, CB# 3290, University of North Carolina, Chapel Hill, North Carolina 27599-3290 and Office of the Associate Director for Strategic Research, Mail Stop A127, Los Alamos National Laboratory, Los Alamos, New Mexico 87545
| | - Darryl S. Williams
- Department of Chemistry, CB# 3290, University of North Carolina, Chapel Hill, North Carolina 27599-3290 and Office of the Associate Director for Strategic Research, Mail Stop A127, Los Alamos National Laboratory, Los Alamos, New Mexico 87545
| | - Thomas J. Meyer
- Department of Chemistry, CB# 3290, University of North Carolina, Chapel Hill, North Carolina 27599-3290 and Office of the Associate Director for Strategic Research, Mail Stop A127, Los Alamos National Laboratory, Los Alamos, New Mexico 87545
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McCall J, Alexander C, Richter MM. Quenching of Electrogenerated Chemiluminescence by Phenols, Hydroquinones, Catechols, and Benzoquinones. Anal Chem 1999; 71:2523-7. [DOI: 10.1021/ac981322c] [Citation(s) in RCA: 177] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Partigianoni CM, Chodorowski-Kimmes S, Treadway JA, Striplin D, Trammell SA, Meyer TJ. A New Electron-Transfer Donor for Photoinduced Electron Transfer in Polypyridyl Molecular Assemblies. Inorg Chem 1999; 38:1193-1198. [PMID: 11670902 DOI: 10.1021/ic980544q] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A synthetic procedure has been devised for the preparation of the reductive quencher ligand 4-methyl-4'-(N-methyl-p-tolylaminomethyl)-2,2'-bipyridine (dmb-tol), which contains toluidine covalently bound to 2,2'-bipyridine. When bound to Re(I) in [Re(I)(dmb-tol)(CO)(3)Cl], laser flash Re(I) --> dmb metal-to-ligand charge-transfer (MLCT) excitation at 355 nm in CH(3)CN at 298 +/- 2 K is followed by efficient, rapid (<5 ns) appearance of a transient with an absorption feature at 470 nm. The transient spectrum is consistent with formation of the redox-separated state, [Re(I)(dmb(-)-tol(+))(CO)(3)Cl], which returns to the ground state by back electron transfer with k(ET) = (1.05 +/- 0.01) x 10(7) s(-)(1) (tau = 95 +/- 1 ns) at 298 +/- 2 K. Rapid, efficient quenching is also observed in the Ru(II) complex [Ru(4,4'-(C(O)NEt(2))(2)bpy)(2)(dmb-tol)](2+). Based on transient absorption measurements, a rapid equilibrium appears to exist between the initial metal-to-ligand charge-transfer excited state and the redox-separated state, which lies at higher energy. Decay to the ground state is dominated by back electron transfer within the redox-separated state which occurs with k > 4 x 10(8) s(-)(1) at 298 +/- 2 K.
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Affiliation(s)
- Colleen M. Partigianoni
- Department of Chemistry, University of North Carolina at Chapel Hill, CB# 3290, Chapel Hill, North Carolina 27599-3290
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Otsuki J, Ogawa H, Okuda N, Araki K, Seno M. Behavior of Ruthenium Trisbipyridine–Anthraquinone Conjugates Connected with Alkyl Spacers in Homogeneous and Microheterogeneous Media. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 1997. [DOI: 10.1246/bcsj.70.2077] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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de Silva AP, Gunaratne HQN, Gunnlaugsson T, Huxley AJM, McCoy CP, Rademacher JT, Rice TE. Signaling Recognition Events with Fluorescent Sensors and Switches. Chem Rev 1997; 97:1515-1566. [PMID: 11851458 DOI: 10.1021/cr960386p] [Citation(s) in RCA: 5176] [Impact Index Per Article: 191.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Storrier GD, Colbran SB, Hibbert D. Homoleptic Fe(II) complexes of new 2,2′:6′,2″-terpyridine ligands with 4′-p-hydroquinonyl or 4′-p-quinolyl pendants. Inorganica Chim Acta 1995. [DOI: 10.1016/0020-1693(95)04770-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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