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Efficient Generation of the Ligand Field Excited State of Tris-(2,2‘-bipyridine)-ruthenium(II) through Sequential Two-Photon Capture by [Ru(bpy)3]2+ or Electron Capture by [Ru(bpy)3]3+
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Abstract
The relaxation dynamics and product distribution resulting from the decay of high lying excited states generated via sequential two-photon capture by [Ru(bpy)3]2+ or electron capture by [Ru(bpy)3]3+ have been investigated by flash photolysis and pulse radiolysis techniques. In comparison to the decay dynamics for monophotonic excitation, dramatically different relaxation dynamics have been observed. High-power flash excitation yields both the lowest lying metal-to-ligand charge transfer (3MLCT) state and a new transient photoproduct associated with nonradiative decay through the photodissociative metal-centered (3dd) excited state/s. The photoproduct is postulated to be [RuII(bpy)2(η1-bpy)]2+ where the pendant pyridine has rotated to yield a transient that is stabilized by a π−bonded or a three-centered Ru−C−H agostic interaction.
Citing Articles
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This article has been cited by 18 ACS Journal articles (5 most recent appear below).
Intramolecular π-Stacking in a Phenylpyrazole-Based Iridium Complex and Its Use in Light-Emitting Electrochemical Cells
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Rubén D. Costa, Enrique Ortí, Henk J. Bolink, Stefan Graber, Catherine E. Housecroft and Edwin C. ConstableJournal of the American Chemical Society2010 132 (17), 5978-5980A novel iridium(III) complex, [Ir(dmppz)2pbpy][PF6] (Hdmppz = 3,5-dimethyl-1-phenylpyrazole and pbpy = 6-phenyl-(2,2′-bipyridine)), is reported. The complex shows an intramolecular face-to-face π-stacking between the phenyl ring of the dmppz ligand and ...
A Deep-Red-Emitting Perylenediimide−Iridium-Complex Dyad: Following the Photophysical Deactivation Pathways
Rubén D. Costa, Francisco J. Céspedes-Guirao, Henk J. Bolink, Fernando Fernández-Lázaro, Ángela Sastre-Santos, Enrique Ortí and Johannes GierschnerThe Journal of Physical Chemistry C2009 113 (44), 19292-19297A Deep-Red-Emitting Perylenediimide−Iridium-Complex Dyad: Following the Photophysical Deactivation Pathways
Rubén D. Costa, Francisco J. Céspedes-Guirao, Henk J. Bolink, Fernando Fernández-Lázaro, Ángela Sastre-Santos, Enrique Ortí and Johannes GierschnerThe Journal of Physical Chemistry C2009 113 (44), 19292-19297We elucidate the photophysical deactivation pathways of a novel perylenediimide−iridium-complex dyad (PDI−iridium), suitable for deep-red electroluminescent devices, in a joint experimental and quantum-chemical approach. Excitation of the PDI mainly ...
Excited State Intervalence Transfer in a Rigid Polymeric Film
Cavan N. Fleming, Dana M. Dattelbaum, David W. Thompson, Aleksei Yu. Ershov, and Thomas J. MeyerJournal of the American Chemical Society2007 129 (31), 9622-9630Excited State Intervalence Transfer in a Rigid Polymeric Film
Cavan N. Fleming, Dana M. Dattelbaum, David W. Thompson, Aleksei Yu. Ershov, and Thomas J. MeyerJournal of the American Chemical Society2007 129 (31), 9622-9630The ligand-bridged complex cis,cis-[(bpy)2ClRu(pz)RuCl(bpy)2]2+ as the PF6- salt, (1)(PF6)2, is stabilized toward photochemical ligand loss in poly(methyl methacrylate) (PMMA). Stabilization allows measurement of metal-to-ligand charge transfer (MLCT) ...
Rigid Medium Stabilization of Metal-to-Ligand Charge Transfer Excited States
David W. Thompson, Cavan N. Fleming, Brent D. Myron, and Thomas J. MeyerThe Journal of Physical Chemistry B2007 111 (24), 6930-6941Rigid Medium Stabilization of Metal-to-Ligand Charge Transfer Excited States
David W. Thompson, Cavan N. Fleming, Brent D. Myron, and Thomas J. MeyerThe Journal of Physical Chemistry B2007 111 (24), 6930-6941The salts [Ru(bpy)3](PF6)2, cis-[Ru(bpy)2(py)2](PF6)2, trans-[Ru(bpy)2(4-Etpy)2](PF6)2, [Ru(tpy)2](PF6)2, and [Re(bpy)(CO)3(4-Etpy)](PF6) (bpy = 2,2‘-bipyridine, py = pyridine, 4-Etpy = 4-ethylpyridine, and tpy = 2,2‘:6‘,2-terpyridine) have been ...
Effect of Molecular and Electronic Structure on the Light-Harvesting Properties of Dye Sensitizers
E. Mete, D. Uner, M. Çakmak, O. Gulseren, and Ş. EllialtoǧluThe Journal of Physical Chemistry C2007 111 (20), 7539-7547Effect of Molecular and Electronic Structure on the Light-Harvesting Properties of Dye Sensitizers
E. Mete, D. Uner, M. Çakmak, O. Gulseren, and Ş. EllialtoǧluThe Journal of Physical Chemistry C2007 111 (20), 7539-7547The systematic trends in structural and electronic properties of perylenediimide (PDI)-derived dye molecules have been investigated by DFT calculations based on the projector-augmented wave (PAW) method including gradient-corrected exchange−correlation ...
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History
- Published In Issue September 06, 2001
- Received May 14, 2001
Revised July 18, 2001
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