151
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Makhoul R, Kumamoto Y, Miyazaki A, Justaud F, Gendron F, Halet JF, Hamon JR, Lapinte C. Synthesis and Properties of a Mixed-Valence Compound with Single-Step Tunneling and Multiple-Step Hopping Behavior. Eur J Inorg Chem 2014. [DOI: 10.1002/ejic.201402022] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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152
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Burgun A, Gendron F, Sumby CJ, Roisnel T, Cador O, Costuas K, Halet JF, Bruce MI, Lapinte C. Hexatriynediyl Chain Spanning Two Cp*(dppe)M Termini (M = Fe, Ru): Evidence for the Dependence of Electronic and Magnetic Couplings on the Relative Orientation of the Termini. Organometallics 2014. [DOI: 10.1021/om500328y] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Alexandre Burgun
- Institut des Sciences
Chimiques de Rennes, UMR 6226 CNRS-Université de Rennes 1, F-35042 Rennes, France
- School of Chemistry
and Physics, University of Adelaide, Adelaide, South Australia 5005, Australia
| | - Frédéric Gendron
- Institut des Sciences
Chimiques de Rennes, UMR 6226 CNRS-Université de Rennes 1, F-35042 Rennes, France
| | - Christopher J. Sumby
- School of Chemistry
and Physics, University of Adelaide, Adelaide, South Australia 5005, Australia
| | - Thierry Roisnel
- Institut des Sciences
Chimiques de Rennes, UMR 6226 CNRS-Université de Rennes 1, F-35042 Rennes, France
| | - Olivier Cador
- Institut des Sciences
Chimiques de Rennes, UMR 6226 CNRS-Université de Rennes 1, F-35042 Rennes, France
| | - Karine Costuas
- Institut des Sciences
Chimiques de Rennes, UMR 6226 CNRS-Université de Rennes 1, F-35042 Rennes, France
| | - Jean-François Halet
- Institut des Sciences
Chimiques de Rennes, UMR 6226 CNRS-Université de Rennes 1, F-35042 Rennes, France
| | - Michael I. Bruce
- School of Chemistry
and Physics, University of Adelaide, Adelaide, South Australia 5005, Australia
| | - Claude Lapinte
- Institut des Sciences
Chimiques de Rennes, UMR 6226 CNRS-Université de Rennes 1, F-35042 Rennes, France
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153
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Photophysical characterization of [Ir(ppy)2(dmb)][PF6] towards application in light-emitting electrochemical cells (LECs). INORG CHEM COMMUN 2014. [DOI: 10.1016/j.inoche.2014.02.010] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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154
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Ito A, Knight TE, Stewart DJ, Brennaman MK, Meyer TJ. Rigid medium effects on photophysical properties of MLCT excited states of polypyridyl Os(II) complexes in polymerized poly(ethylene glycol)dimethacrylate monoliths. J Phys Chem A 2014; 118:10326-32. [PMID: 24720473 DOI: 10.1021/jp5019873] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Higher-energy emissions from the metal-to-ligand charge-transfer (MLCT) excited states of a series of polypyridyl Os(II) complexes were observed at the fluid-to-film transition in PEG-DMA550. The higher-energy excited states, caused by a "rigid medium effect" in the film, led to enhanced emission quantum yields and longer excited-state lifetimes. Detailed analyses of spectra and excited-state dynamics by Franck-Condon emission spectral analysis and application of the energy gap law for nonradiative excited-state decay reveal that the rigid medium effect arises from the inability of part of the local medium dielectric environment to respond to the change in charge distribution in the excited state during its lifetime. Enhanced excited-state lifetimes are consistent with qualitative and quantitative predictions of the energy gap law.
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Affiliation(s)
- Akitaka Ito
- Department of Chemistry, The University of North Carolina at Chapel Hill , Chapel Hill, North Carolina 27599, United States
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155
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Minato T, Suzuki K, Kamata K, Mizuno N. Synthesis of α-Dawson-Type Silicotungstate [α-Si2W18O62]8−and Protonation and Deprotonation Inside the Aperture through Intramolecular Hydrogen Bonds. Chemistry 2014; 20:5946-52. [DOI: 10.1002/chem.201400390] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2014] [Indexed: 11/07/2022]
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156
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Zanoni KPS, Kariyazaki BK, Ito A, Brennaman MK, Meyer TJ, Murakami Iha NY. Blue-Green Iridium(III) Emitter and Comprehensive Photophysical Elucidation of Heteroleptic Cyclometalated Iridium(III) Complexes. Inorg Chem 2014; 53:4089-99. [DOI: 10.1021/ic500070s] [Citation(s) in RCA: 102] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Kassio P. S. Zanoni
- Laboratory
of Photochemistry and Energy Conversion, Instituto de Química, Universidade de São Paulo − USP, Av. Prof. Lineu Prestes, 748, 05508-900, São Paulo, SP, Brazil
| | - Bruna K. Kariyazaki
- Laboratory
of Photochemistry and Energy Conversion, Instituto de Química, Universidade de São Paulo − USP, Av. Prof. Lineu Prestes, 748, 05508-900, São Paulo, SP, Brazil
| | - Akitaka Ito
- Department
of Chemistry, University of North Carolina at Chapel Hill − UNC, 123 South Road, Chapel Hill, North Carolina 27599-3290, United States
- Department of Chemistry, Graduate School
of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka 558-8585, Japan
| | - M. Kyle Brennaman
- Department
of Chemistry, University of North Carolina at Chapel Hill − UNC, 123 South Road, Chapel Hill, North Carolina 27599-3290, United States
| | - Thomas J. Meyer
- Department
of Chemistry, University of North Carolina at Chapel Hill − UNC, 123 South Road, Chapel Hill, North Carolina 27599-3290, United States
| | - Neyde Y. Murakami Iha
- Laboratory
of Photochemistry and Energy Conversion, Instituto de Química, Universidade de São Paulo − USP, Av. Prof. Lineu Prestes, 748, 05508-900, São Paulo, SP, Brazil
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157
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Ito A, Kawanishi K, Sakuda E, Kitamura N. Synthetic control of spectroscopic and photophysical properties of triarylborane derivatives having peripheral electron-donating groups. Chemistry 2014; 20:3940-53. [PMID: 24644157 DOI: 10.1002/chem.201304207] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2013] [Indexed: 11/10/2022]
Abstract
The spectroscopic and photophysical properties of triarylborane derivatives were controlled by the nature of the triarylborane core (trixylyl- or trianthrylborane) and peripheral electron-donating groups (N,N-diphenylamino or 9H-carbazolyl groups). The triarylborane derivatives with and without the electron-donating groups showed intramolecular charge-transfer absorption/fluorescence transitions between the π orbital of the aryl group (π(aryl)) and the vacant p orbital on the boron atom (p(B), π(aryl)-p(B) CT), and the fluorescence color was tunable from blue to red by the combination of peripheral electron-donating groups and a triarylborane core. Detailed electrochemical, spectroscopic, and photophysical studies of the derivatives, including solvent dependences of the spectroscopic and photophysical properties, demonstrated that the HOMO and LUMO of each derivative were determined primarily by the nature of the peripheral electron-donating group and the triarylborane core, respectively. The effects of solvent polarity on the fluorescence quantum yield and lifetime of the derivatives were also tunable by the choice of the triarylborane core.
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Affiliation(s)
- Akitaka Ito
- Department of Chemistry, Faculty of Science, Hokkaido University, Kita-10, Nishi-8, Kita-ku, Sapporo 060-0810 (Japan), Fax: (+81) 11-706-4630; Department of Chemistry, Graduate School of Science, Osaka City University, 3-3-138, Sugimoto, Sumiyoshi-ku, Osaka 558-8585 (Japan).
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158
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Nagarajaprakash R, Divya D, Ramakrishna B, Manimaran B. Synthesis and Spectroscopic and Structural Characterization of Oxamidato-Bridged Rhenium(I) Supramolecular Rectangles with Ester Functionalization. Organometallics 2014. [DOI: 10.1021/om400776m] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- R. Nagarajaprakash
- Department
of Chemistry, Pondicherry University, Puducherry 605014, India
| | - D. Divya
- Department
of Chemistry, Pondicherry University, Puducherry 605014, India
| | | | - Bala. Manimaran
- Department
of Chemistry, Pondicherry University, Puducherry 605014, India
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159
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Fukuda R, Ehara M, Cammi R. Electronic excitation spectra of molecules in solution calculated using the symmetry-adapted cluster-configuration interaction method in the polarizable continuum model with perturbative approach. J Chem Phys 2014; 140:064114. [DOI: 10.1063/1.4864756] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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160
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Yang H, Liu Y, Hu DD. Syntheses, Structures, and Catalytic Activities of Copper(I) Complexes with the Ligand 2(4,5-Diphenyl-1H-imidazol-2-yl)pyridine. Z Anorg Allg Chem 2014. [DOI: 10.1002/zaac.201300223] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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161
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Taheri A, Meyer GJ. Temperature dependent iodide oxidation by MLCT excited states. Dalton Trans 2014; 43:17856-63. [DOI: 10.1039/c4dt01683a] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Temperature dependent excited state iodide oxidation by two heteroleptic Ru polypyridyl compounds was quantified for the first time.
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Affiliation(s)
- Atefeh Taheri
- Department of Chemistry
- Johns Hopkins University
- Baltimore, USA
| | - Gerald J. Meyer
- Department of Chemistry
- Johns Hopkins University
- Baltimore, USA
- Department of Chemistry
- University of North Carolina at Chapel Hill
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162
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Bork MA, Vibbert HB, Stewart DJ, Fanwick PE, McMillin DR. Varying Substituents and Solvents To Maximize the Luminescence from [Ru(trpy)(bpy)CN]+ Derivatives. Inorg Chem 2013; 52:12553-60. [PMID: 24128309 DOI: 10.1021/ic4016367] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Matthew A. Bork
- Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, Indiana 47907-2084, United States
| | - Hunter B. Vibbert
- Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, Indiana 47907-2084, United States
| | - David J. Stewart
- Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, Indiana 47907-2084, United States
| | - Phillip E. Fanwick
- Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, Indiana 47907-2084, United States
| | - David R. McMillin
- Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, Indiana 47907-2084, United States
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163
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Hanson K, Losego MD, Kalanyan B, Parsons GN, Meyer TJ. Stabilizing small molecules on metal oxide surfaces using atomic layer deposition. NANO LETTERS 2013; 13:4802-9. [PMID: 23978281 DOI: 10.1021/nl402416s] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Device lifetimes and commercial viability of dye-sensitized solar cells (DSSCs) and dye-sensitized photoelectrosynthesis cells (DSPECs) are dependent on the stability of the surface bound molecular chromophores and catalysts. Maintaining the integrity of the solution-metal oxide interface is especially challenging in DSPECs for water oxidation where it is necessary to perform high numbers of turnovers, under irradiation in an aqueous environment. In this study, we describe the atomic layer deposition (ALD) of TiO2 on nanocrystalline TiO2 prefunctionalized with the dye molecule [Ru(bpy)2(4,4'-(PO3H2)bpy)](2+) (RuP) as a strategy to stabilize surface bound molecules. The resulting films are over an order of magnitude more photostable than untreated films and the desorption rate constant exponentially decreases with increased thickness of ALD TiO2 overlayers. However, the injection yield for TiO2-RuP with ALD TiO2 also decreases with increasing overlayer thickness. The combination of decreased injection yield and 95% quenched emission suggests that the ALD TiO2 overlayer acts as a competitive electron acceptor from RuP*, effectively nonproductively quenching the excited state. The ALD TiO2 also increases back electron transfer rates, relative to the untreated film, but is independent of overlayer thickness. The results for TiO2-RuP with an ALD TiO2 overlayer are compared with similar films having ALD Al2O3 overlayers.
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Affiliation(s)
- Kenneth Hanson
- Department of Chemistry, University of North Carolina at Chapel Hill , Chapel Hill, North Carolina 27599, United States
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164
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Fortage J, Dupeyre G, Tuyèras F, Marvaud V, Ochsenbein P, Ciofini I, Hromadová M, Pospísil L, Arrigo A, Trovato E, Puntoriero F, Lainé PP, Campagna S. Molecular Dyads of Ruthenium(II)– or Osmium(II)–Bis(terpyridine) Chromophores and Expanded Pyridinium Acceptors: Equilibration between MLCT and Charge-Separated Excited States. Inorg Chem 2013; 52:11944-55. [DOI: 10.1021/ic401639g] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jérôme Fortage
- Univ Paris Diderot, Sorbonne Paris Cité, ITODYS, UMR
CNRS 7086, 15 rue J-A de Baïf, 75013 Paris, France
- UPMC, Université Paris 06, Institut Parisien
de Chimie Moléculaire, UMR 7201 CNRS, Case 42, 4 place Jussieu, 75005 Paris, France
| | - Grégory Dupeyre
- Univ Paris Diderot, Sorbonne Paris Cité, ITODYS, UMR
CNRS 7086, 15 rue J-A de Baïf, 75013 Paris, France
| | - Fabien Tuyèras
- Univ Paris Diderot, Sorbonne Paris Cité, ITODYS, UMR
CNRS 7086, 15 rue J-A de Baïf, 75013 Paris, France
| | - Valérie Marvaud
- UPMC, Université Paris 06, Institut Parisien
de Chimie Moléculaire, UMR 7201 CNRS, Case 42, 4 place Jussieu, 75005 Paris, France
| | - Philippe Ochsenbein
- Laboratoire
de Cristallographie et Modélisation Moléculaire du Solide, Sanofi LG-CR, 371 rue du Professeur Blayac, 34184 Montpellier CEDEX 04, France
| | - Ilaria Ciofini
- École Nationale Supérieure de Chimie de Paris − Chimie ParisTech, LECIME, UMR 7575 CNRS, 11 rue Pierre
et Marie Curie, 75005 Paris, France
| | - Magdaléna Hromadová
- J. Heyrovský Institute of Physical Chemistry of ASCR, v.v.i., Dolejškova 3, 18223 Prague, Czech Republic
| | - Lubomír Pospísil
- J. Heyrovský Institute of Physical Chemistry of ASCR, v.v.i., Dolejškova 3, 18223 Prague, Czech Republic
| | - Antonino Arrigo
- Dipartimento
di Scienze Chimiche, Università di Messina, and Centro Interuniversitario per la Conversione Chimica dell’Energia Solare (SOLARCHEM), Via
F. Stagno d’Alcontres 31, I-98166 Messina, Italy
| | - Emanuela Trovato
- Dipartimento
di Scienze Chimiche, Università di Messina, and Centro Interuniversitario per la Conversione Chimica dell’Energia Solare (SOLARCHEM), Via
F. Stagno d’Alcontres 31, I-98166 Messina, Italy
| | - Fausto Puntoriero
- Dipartimento
di Scienze Chimiche, Università di Messina, and Centro Interuniversitario per la Conversione Chimica dell’Energia Solare (SOLARCHEM), Via
F. Stagno d’Alcontres 31, I-98166 Messina, Italy
| | - Philippe P. Lainé
- Univ Paris Diderot, Sorbonne Paris Cité, ITODYS, UMR
CNRS 7086, 15 rue J-A de Baïf, 75013 Paris, France
| | - Sebastiano Campagna
- Dipartimento
di Scienze Chimiche, Università di Messina, and Centro Interuniversitario per la Conversione Chimica dell’Energia Solare (SOLARCHEM), Via
F. Stagno d’Alcontres 31, I-98166 Messina, Italy
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165
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Sharmin A, Salassa L, Rosenberg E, Ross JBA, Abbott G, Black L, Terwilliger M, Brooks R. Photophysical studies of bioconjugated ruthenium metal-ligand complexes incorporated in phospholipid membrane bilayers. Inorg Chem 2013; 52:10835-45. [PMID: 24063694 DOI: 10.1021/ic400706u] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The luminescent, mono-diimine ruthenium complexes [(H)Ru(CO)(PPh3)2(dcbpy)][PF6] (1) (dcbpy = 4,4'-dicarboxy-2,2'-bipyridyl) and [(H)Ru(CO)(dppene)(5-amino-1,10-phen)][PF6] (2) (dppene = bis(diphenylphosphino)ethylene; phen = phenanthroline) were conjugated with 1,2-dihexadecanoyl-sn-glycero-3-phosphoethanolamine (DPPE) and with cholesterol in the case of complex 2. Using standard conjugation techniques, compound 1 gives the bis-lipid derivative [(H)Ru(CO)(PPh3)2(dcbpy-N-DPPE2)][PF6] (3), while 2 provides the monolipid conjugate [(H)Ru(CO)(dppene)(1,10-phen-5-NHC(S)-N-DPPE)][PF6] (4) and the cholesterol derivative [(H)Ru(CO)(dppene)(1,10-phen-5-NHC(O)Ocholesteryl)][PF6] (5). These compounds were characterized by spectroscopic methods, and their photophysical properties were measured in organic solvents. The luminescence of lipid conjugates 3 and 4 is quenched in organic solvents while compound 4 shows a weak, short-lived, blue-shifted emission in aqueous solution. The cholesterol conjugate 5 shows the long-lived, microsecond-time scale emission associated with triplet metal-to-ligand charge-transfer excited states. Incorporation of conjugate 3 in lipid bilayer vesicles restores the luminescence, but with blue shifts (~80 nm) accompanied by nanosecond-time scale lifetimes. In the vesicles conjugate 4 shows a short-lived and blue-shifted emission similar to that observed in solution but with increased intensity. Conjugation of the complex [(H)Ru(CO)(PhP2C2H4C(O)O-N-succinimidyl)2(bpy)][PF6] (6") (bpy = 2,2'-bipyridyl) with DPPE gives the phosphine-conjugated complex [(H)Ru(CO)(PhP2C2H4C(O)-N-DPPE)2(bpy)][PF6] (7). Complex 7 also exhibits a short-lived and blue-shifted emission in solution and in vesicles as observed for complexes 3 and 4. We have also conjugated the complex [Ru(bpy)2(5-amino-1,10-phen)][PF6]2 (8) with both cholesterol (9) and DPPE (10). Neither complex 9 nor the previously reported complex 10 exhibited the blue shifts observed for complexes 3 and 4 when incorporated into large unilamellar vesicles (LUVs). The anisotropies of the emissions of complexes 3, 4, and 7 were also measured in LUVs, and those of complex 5 were measured in both glycerol and LUVs. High fundamental anisotropies were observed for complexes 3, 4, and 7.
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Affiliation(s)
- Ayesha Sharmin
- Department of Chemistry and Biochemistry, University of Montana , Missoula, Montana 59812, United States
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166
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Nolan D, Gil B, Wang L, Zhao J, Draper SM. Structure-Property Relationships and1O2Photosensitisation in Sterically Encumbered Diimine PtIIAcetylide Complexes. Chemistry 2013; 19:15615-26. [DOI: 10.1002/chem.201300759] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2013] [Revised: 07/02/2013] [Indexed: 11/06/2022]
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167
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Breuer R, Schmittel M. Unsymmetrically Substituted 1,1′-Biferrocenylenes Maintain Class III Mixed-Valence Character. Organometallics 2013. [DOI: 10.1021/om400502e] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Rochus Breuer
- Center
of Micro- and Nanochemistry and Engineering, Organische Chemie I, Universität Siegen, Adolf-Reichwein-Straße 2, D-57068 Siegen, Germany
| | - Michael Schmittel
- Center
of Micro- and Nanochemistry and Engineering, Organische Chemie I, Universität Siegen, Adolf-Reichwein-Straße 2, D-57068 Siegen, Germany
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168
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Dolores Santana M, García-Bueno R, García G, Piernas MJ, Pérez J, García L, López-García I. Benzazolate complexes of pentacoordinate nickel(II). Synthesis, spectroscopic study and luminescent response towards metal cations. Polyhedron 2013. [DOI: 10.1016/j.poly.2013.05.047] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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169
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Hewitt JT, Concepcion JJ, Damrauer NH. Inverse Kinetic Isotope Effect in the Excited-State Relaxation of a Ru(II)–Aquo Complex: Revealing the Impact of Hydrogen-Bond Dynamics on Nonradiative Decay. J Am Chem Soc 2013; 135:12500-3. [DOI: 10.1021/ja4037498] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Joshua T. Hewitt
- Department of Chemistry and
Biochemistry, University of Colorado, Boulder,
Colorado 80309, United States
| | - Javier J. Concepcion
- Department of Chemistry, The University of North Carolina, Chapel Hill, North
Carolina 27599-3290, United States
| | - Niels H. Damrauer
- Department of Chemistry and
Biochemistry, University of Colorado, Boulder,
Colorado 80309, United States
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170
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Chakraborty A, Deaton JC, Haefele A, Castellano FN. Charge-Transfer and Ligand-Localized Photophysics in Luminescent Cyclometalated Pyrazolate-Bridged Dinuclear Platinum(II) Complexes. Organometallics 2013. [DOI: 10.1021/om400276v] [Citation(s) in RCA: 83] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Arnab Chakraborty
- Department of Chemistry
and Center for Photochemical Sciences, Bowling Green State University, Bowling Green, Ohio 43403, United
States
| | - Joseph C. Deaton
- Department of Chemistry
and Center for Photochemical Sciences, Bowling Green State University, Bowling Green, Ohio 43403, United
States
| | - Alexandre Haefele
- Department of Chemistry
and Center for Photochemical Sciences, Bowling Green State University, Bowling Green, Ohio 43403, United
States
| | - Felix N. Castellano
- Department of Chemistry
and Center for Photochemical Sciences, Bowling Green State University, Bowling Green, Ohio 43403, United
States
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171
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Mücke P, Winter RF, Kowalski K. Lack of electronic coupling despite half-wave potential splittings in ferrocenylvinyl-substituted [2.2]-paracyclophanes. J Organomet Chem 2013. [DOI: 10.1016/j.jorganchem.2013.03.024] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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172
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Abstract
In 1974, the metal-to-ligand charge transfer (MLCT) excited state,
[Ru(bpy)3]2+*, was shown to undergo electron transfer
quenching by methylviologen dication (MV2+), inspiring a new approach
to artificial photosynthesis based on molecules, molecular-level phenomena, and
a “modular approach”. In the intervening years, application of synthesis,
excited-state measurements, and theory to [Ru(bpy)3]2+*
and its relatives has had an outsized impact on photochemistry and photophysics.
They have provided a basis for exploring the energy gap law for nonradiative
decay and the role of molecular vibrations and solvent and medium effects on
excited-state properties. Much has been learned about light absorption,
excited-state electronic and molecular structure, and excited-state dynamics on
timescales from femtoseconds to milliseconds. Excited-state properties and
reactivity have been exploited in the investigation of electron and energy
transfer in solution, in molecular assemblies, and in derivatized polymers and
oligoprolines. An integrated, hybrid approach to solar fuels, based on
dye-sensitized photoelectrosynthesis cells (DSPECs), has emerged and is being
actively investigated.
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173
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Wenger OS. Photoinduced electron tunneling between randomly dispersed donors and acceptors in frozen glasses and other rigid matrices. Phys Chem Chem Phys 2013; 15:10673-85. [PMID: 23722299 DOI: 10.1039/c3cp00011g] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
In fluid solution un-tethered donors and acceptors can diffuse freely, and consequently the donor-acceptor distance is usually not fixed on the timescale of an electron transfer event. When attempting to investigate the influence of driving-force changes or donor-acceptor distance variations on electron transfer rates this can be a problem. In rigid matrices diffusion is suppressed, and it becomes possible to investigate fixed-distance electron transfer. This method represents an attractive alternative to investigate rigid rod-like donor-bridge-acceptor molecules which have to be made in elaborate syntheses. This perspective focuses specifically on the distance dependence of photoinduced electron transfer which occurs via tunneling of charge carriers through rigid matrices over distances between 1 and 33 Å. Some key aspects of the theoretical models commonly used for analyzing kinetic data of electron tunneling through rigid matrices are recapitulated. New findings from this rather mature field of research are emphasized.
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Affiliation(s)
- Oliver S Wenger
- Universität Basel, Departement Chemie, Spitalstrasse 51, CH-4056 Basel, Switzerland.
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174
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Charge delocalization vs localization in carbon-rich iron mixed-valence complexes: A subtle interplay between the carbon spacer and the (dppe)Cp*Fe organometallic electrophore. Coord Chem Rev 2013. [DOI: 10.1016/j.ccr.2012.09.007] [Citation(s) in RCA: 155] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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175
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Justaud F, Gendron F, Ogyu Y, Kumamoto Y, Miyazaki A, Ouahab L, Costuas K, Halet JF, Lapinte C. Hybrid molecular systems containing tetrathiafulvalene and iron-alkynyl electrophores: five-component functional molecules obtained from C-H bond activation. Chemistry 2013; 19:5742-57. [PMID: 23447398 DOI: 10.1002/chem.201204227] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2012] [Indexed: 11/10/2022]
Abstract
Treatment of [Cp*(dppe)Fe-C≡C-TTFMe3] (1) with Ag[PF6] (3 equiv) in DMF provides the binuclear complex [Cp*(dppe)Fe=C=C=TTFMe2 =CH-CH=TTFMe2 =C=C=Fe(dppe)Cp*][PF6]2 (2[PF6 ]2) isolated as a deep-blue powder in 69 % yield. EPR monitoring of the reaction and comparison of the experimental and calculated EPR spectra allowed the identification of the radical salt [Cp*(dppe)Fe=C=C=TTFMe2 =CH][PF6]2 ([1-CH][PF6]) an intermediate of the reaction, which results from the activation of the methyl group attached in vicinal position with respect to the alkynyl-iron on the TTF ligand by the triple oxidation of 1 leading to its deprotonation by the solvent. The dimerization of [1-CH][PF6] through carbon-carbon bond formation provides 2[PF6]2. The cyclic voltammetry (CV) experiments show that 2[PF6]2 is subject to two sequential well-reversible one-electron reductions yielding the complexes 2[PF6] and 2. The CV also shows that further oxidation of 2[PF6]2 generates 2[PF6]n (n=3-6) at the electrode. Treatment of 2[PF6]2 with KOtBu provides 2[PF6] and 2 as stable powders. The salts 2[PF6] and 2[PF6]2 were characterized by XRD. The electronic structures of 2(n+) (n=0-2) were computed. The new complexes were also characterized by NMR, IR, Mössbauer, EPR, UV/Vis and NIR spectroscopies. The data show that the three complexes 2[PF6]n are iron(II) derivatives in the ground state. In the solid state, the dication 2(2+) is diamagnetic and has a bis(allenylidene-iron) structure with one positive charge on each iron building block. In solution, as a result of the thermal motion of the metal-carbon backbone, the triplet excited state becomes thermally accessible and equilibrium takes place between singlet and triplet states. In 2[PF6], the charge and the spin are both symmetrically distributed on the carbon bridge and only moderately on the iron and TTFMe2 electroactive centers.
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Affiliation(s)
- Frédéric Justaud
- Institut des Sciences Chimiques de Rennes, UMR 6226 CNRS-Universté de Rennes 1, Rennes, France
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176
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Ito A, Stewart DJ, Knight TE, Fang Z, Brennaman MK, Meyer TJ. Excited-State Dynamics in Rigid Media: Evidence for Long-Range Energy Transfer. J Phys Chem B 2013; 117:3428-38. [DOI: 10.1021/jp400514r] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Akitaka Ito
- Department
of Chemistry, The University of North Carolina at Chapel Hill, Chapel Hill, North
Carolina 27599, United States
| | - David J. Stewart
- Department
of Chemistry, The University of North Carolina at Chapel Hill, Chapel Hill, North
Carolina 27599, United States
| | - Troy E. Knight
- Department
of Chemistry, The University of North Carolina at Chapel Hill, Chapel Hill, North
Carolina 27599, United States
| | - Zhen Fang
- Department
of Chemistry, The University of North Carolina at Chapel Hill, Chapel Hill, North
Carolina 27599, United States
| | - M. Kyle Brennaman
- Department
of Chemistry, The University of North Carolina at Chapel Hill, Chapel Hill, North
Carolina 27599, United States
| | - Thomas J. Meyer
- Department
of Chemistry, The University of North Carolina at Chapel Hill, Chapel Hill, North
Carolina 27599, United States
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177
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Borodkin GI, Vorob’ev AY, Supranovich VI, Gatilov YV, Shubin VG. Molecular and crystal structure of 1,1′-diamino-2,2′-bipyridinium and 1,1′-diamino-4,4′-bipyridinium dimesitylenesulphonates: A combined experimental and theoretical study. J Mol Struct 2013. [DOI: 10.1016/j.molstruc.2012.11.043] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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178
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Bindra GS, Schulz M, Paul A, Groarke R, Soman S, Inglis JL, Browne WR, Pfeffer MG, Rau S, MacLean BJ, Pryce MT, Vos JG. The role of bridging ligand in hydrogen generation by photocatalytic Ru/Pd assemblies. Dalton Trans 2013; 41:13050-9. [PMID: 23014910 DOI: 10.1039/c2dt30948c] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
The synthesis and characterisation of two terpyridine based ruthenium/palladium heteronuclear compounds are presented. The photocatalytic behaviour of the Ru/Pd complex containing the linear 2,2':5',2''-terpyridine bridge (1a) and its analogue the non-linear 2,2':6',2''-terpyridine bridge (2a) are compared together with the respective mononuclear complexes 1 and 2. Irradiation of 1a with visible light (e.g., 470 nm) results in the photocatalytic generation of dihydrogen gas. Photocatalysis was not observed with complex 2a by contrast. A comparison with the photocatalytic behaviour of the precursors 1 and 2 indicates, that while for 1a the photocatalysis is an intramolecular process, for the mononuclear precursors it is intermolecular. The photophysical and electrochemical properties of the mono- and heterobinuclear compounds are compared. Raman spectroscopy and DFT calculations indicate that there are substantial differences in the nature of the lowest energy (3)MLCT states of 1a and 2a, from which the contrasting photocatalytic activities of the complexes can be understood.
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Affiliation(s)
- Gurmeet Singh Bindra
- SRC for Solar Energy Conversion, School of Chemical Sciences, Dublin City University, Glasnevin, Dublin, Ireland
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179
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Aparicio PA, Poblet JM, López X. Tungsten Redox Waves in [XMW11O40]n-(X = P, Si, Al and M = W, Mo, V, Nb, Ti) Keggin Compounds - Effect of Localised/Delocalised Charges. Eur J Inorg Chem 2013. [DOI: 10.1002/ejic.201201384] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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180
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Hanson K, Wilger DJ, Jones ST, Harrison DP, Bettis SE, Luo H, Papanikolas JM, Waters ML, Meyer TJ. Electron transfer dynamics of peptide-derivatized RuII-polypyridyl complexes on nanocrystalline metal oxide films. Biopolymers 2013; 100:25-37. [DOI: 10.1002/bip.22152] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2012] [Revised: 08/09/2012] [Accepted: 08/27/2012] [Indexed: 12/24/2022]
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181
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O’Donnell RM, Johansson PG, Abrahamsson M, Meyer GJ. Excited-State Relaxation of Ruthenium Polypyridyl Compounds Relevant to Dye-Sensitized Solar Cells. Inorg Chem 2013; 52:6839-48. [DOI: 10.1021/ic302339a] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ryan M. O’Donnell
- Departments
of Chemistry and
Materials Science and Engineering, Johns Hopkins University, 3400 North Charles Street, Baltimore, Maryland 21218, United States
| | - Patrik G. Johansson
- Departments
of Chemistry and
Materials Science and Engineering, Johns Hopkins University, 3400 North Charles Street, Baltimore, Maryland 21218, United States
| | - Maria Abrahamsson
- Department of Chemical and Biological
Engineering, Chalmers University of Technology, 41296 Göteborg, Sweden
| | - Gerald J. Meyer
- Departments
of Chemistry and
Materials Science and Engineering, Johns Hopkins University, 3400 North Charles Street, Baltimore, Maryland 21218, United States
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182
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Brennan C, Draksharapu A, Browne WR, McGarvey JJ, Vos JG, Pryce MT. Unexpected reversible pyrazine based methylation in a Ru(ii) complex bearing a pyrazin-2′-yl-1,2,4-triazolato ligand and its effect on acid/base and photophysical properties. Dalton Trans 2013; 42:2546-55. [DOI: 10.1039/c2dt31589k] [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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183
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Shinozaki K, Tenmyo K, Suzuki T. Isotope effect of crystal water on emission lifetime of Ru(dbb)2(CN)2·2H2O (dbb = 4,4′-di-tert-butyl-2,2′-bipyridine) crystal. RSC Adv 2013. [DOI: 10.1039/c3ra23362f] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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184
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Klein JH, Sunderland TL, Kaufmann C, Holzapfel M, Schmiedel A, Lambert C. Stepwise versus pseudo-concerted two-electron-transfer in a triarylamine–iridium dipyrrin–naphthalene diimide triad. Phys Chem Chem Phys 2013; 15:16024-30. [DOI: 10.1039/c3cp51981c] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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185
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Charge-separated excited states in platinum(II) chromophores: Photophysics, formation, stabilization and utilization in solar energy conversion. Coord Chem Rev 2012. [DOI: 10.1016/j.ccr.2012.07.010] [Citation(s) in RCA: 73] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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186
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Linseis M, Záliš S, Zabel M, Winter RF. Ruthenium Stilbenyl and Diruthenium Distyrylethene Complexes: Aspects of Electron Delocalization and Electrocatalyzed Isomerization of the Z-Isomer. J Am Chem Soc 2012; 134:16671-92. [DOI: 10.1021/ja3059606] [Citation(s) in RCA: 79] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Michael Linseis
- Fachbereich Chemie der Universität Konstanz, Universitätsstraße
31, D-78457 Konstanz, Germany,
- Institut für Anorganische Chemie der Universität Regensburg, D-93040 Regensburg, Germany
| | - Stanislav Záliš
- J. Heyrovský Institute
of Physical Chemistry v.v.i, Academy of Sciences of the Czech Republic, Czech Republic
| | - Manfred Zabel
- Institut für Anorganische Chemie der Universität Regensburg, D-93040 Regensburg, Germany
| | - Rainer F. Winter
- Fachbereich Chemie der Universität Konstanz, Universitätsstraße
31, D-78457 Konstanz, Germany,
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187
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Jha SK, Ji M, Gaffney KJ, Boxer SG. Site-specific measurement of water dynamics in the substrate pocket of ketosteroid isomerase using time-resolved vibrational spectroscopy. J Phys Chem B 2012; 116:11414-21. [PMID: 22931297 DOI: 10.1021/jp305225r] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Little is known about the reorganization capacity of water molecules at the active sites of enzymes and how this couples to the catalytic reaction. Here, we study the dynamics of water molecules at the active site of a highly proficient enzyme, Δ(5)-3-ketosteroid isomerase (KSI), during a light-activated mimic of its catalytic cycle. Photoexcitation of a nitrile-containing photoacid, coumarin183 (C183), mimics the change in charge density that occurs at the active site of KSI during the first step of the catalytic reaction. The nitrile of C183 is exposed to water when bound to the KSI active site, and we used time-resolved vibrational spectroscopy as a site-specific probe to study the solvation dynamics of water molecules in the vicinity of the nitrile. We observed that water molecules at the active site of KSI are highly rigid, during the light-activated catalytic cycle, compared to the solvation dynamics observed in bulk water. On the basis of this result, we hypothesize that rigid water dipoles at the active site might help in the maintenance of the preorganized electrostatic environment required for efficient catalysis. The results also demonstrate the utility of nitrile probes in measuring the dynamics of local (H-bonded) water molecules in contrast to the commonly used fluorescence methods which measure the average behavior of primary and subsequent spheres of solvation.
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Affiliation(s)
- Santosh Kumar Jha
- Department of Chemistry, Stanford University, Stanford, California 94305-5012, USA
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188
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Metera KL, Hänni KD, Zhou G, Nayak MK, Bazzi HS, Juncker D, Sleiman HF. Luminescent Iridium(III)-Containing Block Copolymers: Self-Assembly into Biotin-Labeled Micelles for Biodetection Assays. ACS Macro Lett 2012; 1:954-959. [PMID: 35607050 DOI: 10.1021/mz3001644] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Luminescent polymers containing Ir(ppy)2(bpy) PF6 complexes, biocompatible poly(ethylene glycol) (PEG) chains, and biotin moieties were synthesized via ring-opening metathesis polymerization (ROMP). Their self-assembly in water into micelles resulted in an increased quantum yield compared to open polymer chains in acetonitrile, which is likely due to core rigidity and desolvation. Streptavidin coated magnetic beads were employed to analyze the binding ability of these micelles. The positioning of the molecular recognition moiety biotin within the polymer chain had a very significant effect on the availability of biotin on the micelle surface and the ability of the micelles to bind to streptavidin. Simply attaching biotin to the end of the ROMP polymer yielded micelles in which the biotin units were shielded by the PEG chains, whereas the synthesis of a new ROMP monomer containing biotin at the end of the PEG chains resulted in improved surface availability of the biotin group. Preliminary experiments in which streptavidin was microcontact-printed onto functionalized glass coverslips also indicated specific binding between the micelles and streptavidin and further demonstrated the potential of these micelle systems to function as luminescent probes in solid-phase biodetection assays.
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Affiliation(s)
- Kimberly L. Metera
- Department of Chemistry and Center for Self-Assembled Chemical Structures (CSACS), McGill University, Montreal, Quebec, Canada H3A 2K6
| | - Kevin D. Hänni
- Department of Chemistry and Center for Self-Assembled Chemical Structures (CSACS), McGill University, Montreal, Quebec, Canada H3A 2K6
| | - Gina Zhou
- Biomedical Engineering Department, McGill University and Genome Quebec Innovation Centre, Montreal, Quebec, Canada H3A 0G1
| | - Manoj K. Nayak
- Department of Chemistry, Texas A&M University at Qatar, P.O. Box 23874, Doha, Qatar
| | - Hassan S. Bazzi
- Department of Chemistry, Texas A&M University at Qatar, P.O. Box 23874, Doha, Qatar
| | - David Juncker
- Biomedical Engineering Department, McGill University and Genome Quebec Innovation Centre, Montreal, Quebec, Canada H3A 0G1
| | - Hanadi F. Sleiman
- Department of Chemistry and Center for Self-Assembled Chemical Structures (CSACS), McGill University, Montreal, Quebec, Canada H3A 2K6
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189
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Uehara K, Fukaya K, Mizuno N. Reactive N-protonated isocyanate species stabilized by bis(μ-hydroxo)divanadium(IV)-substituted polyoxometalate. Angew Chem Int Ed Engl 2012; 51:7715-8. [PMID: 22736381 DOI: 10.1002/anie.201108205] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2011] [Revised: 04/17/2012] [Indexed: 11/10/2022]
Abstract
O- or N-protonated? The bis(μ-hydroxo)divanadium(IV)-substituted γ-Keggin-type polyoxometalate (see picture, left) (TBA)(4)[γ-SiV(IV)(2)W(10)O(36)(μ-OH)(4)] (TBA = tetra(n-butyl)ammonium) was synthesized and characterized by X-ray crystallography. Its reaction with phenyl isocyanate gave (TBA)(4)[γ-SiV(IV)(2)W(10)O(38)(μ-OH)(2)(PhNHCO)(2)], which contains two N-protonated phenyl isocyanate species and catalyzes the cyclotrimerization of phenyl isocyanate.
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Affiliation(s)
- Kazuhiro Uehara
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
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190
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Ito A, Kang Y, Saito S, Sakuda E, Kitamura N. Photophysical and Photoredox Characteristics of a Novel Tricarbonyl Rhenium(I) Complex Having an Arylborane-Appended Aromatic Diimine Ligand. Inorg Chem 2012; 51:7722-32. [DOI: 10.1021/ic3007469] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
| | | | | | - Eri Sakuda
- PRESTO, Japan Science and Technology Agency (JST), 4-1-8, Honcho, Kawaguchi,
Saitama 332-0012, Japan
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191
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Uehara K, Fukaya K, Mizuno N. Reactive N-Protonated Isocyanate Species Stabilized by Bis(μ-hydroxo)divanadium(IV)-Substituted Polyoxometalate. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201108205] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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192
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Matyushov DV. Non-Ergodic Electron Transfer in Mixed-Valence Charge-Transfer Complexes. J Phys Chem Lett 2012; 3:1644-1648. [PMID: 26285722 DOI: 10.1021/jz300630t] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Theories of activated transitions traditionally separate the dynamics and statistics of the thermal bath in the reaction rate into the preexponential frequency factor for the dynamics and a Boltzmann factor for the statistics. When the reaction rate is comparable to relaxation frequencies of the medium, the statistics loses ergodicity and the activation barrier becomes dependent on the medium dynamics. This scenario is realized for mixed-valence self-exchange electron transfer at temperatures near the point of solvent crystallization. These complexes, studied by Kubiak and coworkers, display anti-Arrhenius temperature dependence on lowering temperature when approaching crystallization; that is, the reaction rate increases nonlinearly in Arrhenius coordinates. Accordingly, the solvent relaxation slows down following a power temperature law. With this functional form for the relaxation time, nonergodic reaction kinetics accounts well for the observations.
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Affiliation(s)
- Dmitry V Matyushov
- Center for Biological Physics, Arizona State University, P.O. Box 871504, Tempe, Arizona 85287-1504, United States
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193
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Weinberg DR, Gagliardi CJ, Hull JF, Murphy CF, Kent CA, Westlake BC, Paul A, Ess DH, McCafferty DG, Meyer TJ. Proton-Coupled Electron Transfer. Chem Rev 2012; 112:4016-93. [DOI: 10.1021/cr200177j] [Citation(s) in RCA: 1125] [Impact Index Per Article: 93.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- David R. Weinberg
- Department
of Chemistry, University
of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290,
United States
- Department of Physical and Environmental
Sciences, Colorado Mesa University, 1100 North Avenue, Grand Junction,
Colorado 81501-3122, United States
| | - Christopher J. Gagliardi
- Department
of Chemistry, University
of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290,
United States
| | - Jonathan F. Hull
- Department
of Chemistry, University
of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290,
United States
| | - Christine Fecenko Murphy
- Department
of Chemistry, B219
Levine Science Research Center, Box 90354, Duke University, Durham,
North Carolina 27708-0354, United States
| | - Caleb A. Kent
- Department
of Chemistry, University
of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290,
United States
| | - Brittany C. Westlake
- The American Chemical Society,
1155 Sixteenth Street NW, Washington, District of Columbia 20036,
United States
| | - Amit Paul
- Department
of Chemistry, University
of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290,
United States
| | - Daniel H. Ess
- Department
of Chemistry, University
of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290,
United States
| | - Dewey Granville McCafferty
- Department
of Chemistry, B219
Levine Science Research Center, Box 90354, Duke University, Durham,
North Carolina 27708-0354, United States
| | - Thomas J. Meyer
- Department
of Chemistry, University
of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290,
United States
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194
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Visible light generation of I-I bonds by Ru-tris(diimine) excited states. Proc Natl Acad Sci U S A 2012; 109:15628-33. [PMID: 22566656 DOI: 10.1073/pnas.1118340109] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Seven Ru-tris(diimine) compounds were prepared to study the photooxidation of iodide. Iodide oxidation results in the formation of I-I bonds, and it is therefore relevant to the conversion and storage of solar energy. Iodide oxidation is also a key step for electrical power generation in dye-sensitized solar cells. The mechanistic details of iodide oxidation and I-I bond formation were elucidated through time-resolved spectroscopic measurements. Bimolecular electron-transfer reactions between Ru-tris(diimine) excited states and iodide first yielded the iodine atom that subsequently reacted with excess I(-) to yield the I-I bond of diiodide (I(2)•-)). An important finding was that excited-state iodide oxidation was rapid (k > 10(9) M(-1) s(-1)) even for thermodynamically uphill reactions. These results indicated that iodide oxidation to the iodine atom may account for a significant fraction of sensitizer regeneration within dye-sensitized solar cells.
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195
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Jiang W, Xiao C, Hao L, Wang Z, Ceymann H, Lambert C, Di Motta S, Negri F. Localization/Delocalization of Charges in Bay-Linked Perylene Bisimides. Chemistry 2012; 18:6764-75. [DOI: 10.1002/chem.201103954] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2011] [Indexed: 11/10/2022]
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196
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Fortage J, Puntoriero F, Tuyèras F, Dupeyre G, Arrigo A, Ciofini I, Lainé PP, Campagna S. Photoinduced Electron Transfer in Os(terpyridine)-biphenylene-(bi)pyridinium Assemblies. Inorg Chem 2012; 51:5342-52. [DOI: 10.1021/ic300297p] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jérôme Fortage
- Université Paris Diderot, Sorbonne Paris Cité, ITODYS, UMR
7086 CNRS, 15 rue Jean-Antoine de Baïf, 75013 Paris, France
| | - Fausto Puntoriero
- Dipartimento di Chimica Inorganica,
Chimica Analitica e Chimica Fisica and Centro Interuniversitario per
la Conversione Chimica dell′Energia Solare (SolarChem-sezione
di Messina), Università di Messina, Via Stagno d′Alcontres 31, I-98166 Messina, Italy
| | - Fabien Tuyèras
- Université Paris Diderot, Sorbonne Paris Cité, ITODYS, UMR
7086 CNRS, 15 rue Jean-Antoine de Baïf, 75013 Paris, France
| | - Grégory Dupeyre
- Université Paris Diderot, Sorbonne Paris Cité, ITODYS, UMR
7086 CNRS, 15 rue Jean-Antoine de Baïf, 75013 Paris, France
| | - Antonino Arrigo
- Dipartimento di Chimica Inorganica,
Chimica Analitica e Chimica Fisica and Centro Interuniversitario per
la Conversione Chimica dell′Energia Solare (SolarChem-sezione
di Messina), Università di Messina, Via Stagno d′Alcontres 31, I-98166 Messina, Italy
| | - Ilaria Ciofini
- École Nationale Supérieure de Chimie de Paris−Chimie ParisTech, LECIME, UMR 7575 CNRS, 11 rue Pierre et Marie Curie, 75005 Paris,
France
| | - Philippe P. Lainé
- Université Paris Diderot, Sorbonne Paris Cité, ITODYS, UMR
7086 CNRS, 15 rue Jean-Antoine de Baïf, 75013 Paris, France
| | - Sebastiano Campagna
- Dipartimento di Chimica Inorganica,
Chimica Analitica e Chimica Fisica and Centro Interuniversitario per
la Conversione Chimica dell′Energia Solare (SolarChem-sezione
di Messina), Università di Messina, Via Stagno d′Alcontres 31, I-98166 Messina, Italy
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197
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Juliá F, Jones PG, González-Herrero P. Synthesis and Photophysical Properties of Cyclometalated Platinum(II) 1,2-Benzenedithiolate Complexes and Heterometallic Derivatives Obtained from the Addition of [Au(PCy3)]+ Units. Inorg Chem 2012; 51:5037-49. [DOI: 10.1021/ic202465k] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Fabio Juliá
- Grupo de Química Organometálica, Departamento de Química Inorgánica, Facultad
de Química, Universidad de Murcia, Apartado 4021, 30071 Murcia, Spain
| | - Peter G. Jones
- Institut für
Anorganische und Analytische Chemie, Technische Universität Braunschweig, Postfach 3329, 38023
Braunschweig, Germany
| | - Pablo González-Herrero
- Grupo de Química Organometálica, Departamento de Química Inorgánica, Facultad
de Química, Universidad de Murcia, Apartado 4021, 30071 Murcia, Spain
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198
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Yersin H. Triplet Emitters for OLED Applications. Mechanisms of Exciton Trapping and Control of Emission Properties. TRANSITION METAL AND RARE EARTH COMPOUNDS 2012. [DOI: 10.1007/b96858] [Citation(s) in RCA: 393] [Impact Index Per Article: 32.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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Jurss JW, Concepcion JJ, Butler JM, Omberg KM, Baraldo LM, Thompson DG, Lebeau EL, Hornstein B, Schoonover JR, Jude H, Thompson JD, Dattelbaum DM, Rocha RC, Templeton JL, Meyer TJ. Electronic Structure of the Water Oxidation Catalyst cis,cis-[(bpy)2(H2O)RuIIIORuIII(OH2)(bpy)2]4+, The Blue Dimer. Inorg Chem 2012; 51:1345-58. [DOI: 10.1021/ic201521w] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Jonah W. Jurss
- Department of Chemistry, University of North Carolina, Chapel
Hill, North Carolina 27599-3290, United States
| | - Javier J. Concepcion
- Department of Chemistry, University of North Carolina, Chapel
Hill, North Carolina 27599-3290, United States
| | | | | | | | | | | | | | | | | | | | | | | | - Joseph L. Templeton
- Department of Chemistry, University of North Carolina, Chapel
Hill, North Carolina 27599-3290, United States
| | - Thomas J. Meyer
- Department of Chemistry, University of North Carolina, Chapel
Hill, North Carolina 27599-3290, United States
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Wuttke E, Pevny F, Hervault YM, Norel L, Drescher M, Winter RF, Rigaut S. Fully Delocalized (Ethynyl)(vinyl)phenylene Bridged Triruthenium Complexes in up to Five Different Oxidation States. Inorg Chem 2012; 51:1902-15. [DOI: 10.1021/ic2022177] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Evelyn Wuttke
- Fachbereich Chemie, Universität Konstanz, Universitätsstraße 10, D-78453
Konstanz, Germany
| | - Florian Pevny
- Fachbereich Chemie, Universität Konstanz, Universitätsstraße 10, D-78453
Konstanz, Germany
| | - Yves-Marie Hervault
- Sciences
Chimiques de Rennes, UMR 6226 CNRS-Université de Rennes 1, Campus de Beaulieu, F-35042, Rennes Cedex,
France
| | - Lucie Norel
- Sciences
Chimiques de Rennes, UMR 6226 CNRS-Université de Rennes 1, Campus de Beaulieu, F-35042, Rennes Cedex,
France
| | - Malte Drescher
- Fachbereich Chemie, Universität Konstanz, Universitätsstraße 10, D-78453
Konstanz, Germany
| | - Rainer F. Winter
- Fachbereich Chemie, Universität Konstanz, Universitätsstraße 10, D-78453
Konstanz, Germany
| | - Stéphane Rigaut
- Sciences
Chimiques de Rennes, UMR 6226 CNRS-Université de Rennes 1, Campus de Beaulieu, F-35042, Rennes Cedex,
France
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