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Barigelletti F, Flamigni L, Guardigli M, et al. Energy Transfer in Rigid Ru(II)/Os(II) Dinuclear Complexes with Biscyclometalating Bridging Ligands Containing a Variable Number of Phenylene Units. Inorg Chem. 1996;35(1):136-142doi: 10.1021/ic9503085.
Barigelletti, F., Flamigni, L., Guardigli, M., Juris, A., Beley, M., Chodorowski-Kimmes, S., Collin, J. P., & Sauvage, J. P. (1996). Energy Transfer in Rigid Ru(II)/Os(II) Dinuclear Complexes with Biscyclometalating Bridging Ligands Containing a Variable Number of Phenylene Units. Inorganic chemistry, 35(1), 136-142. https://doi.org/10.1021/ic9503085
Barigelletti, Francesco, et al. "Energy Transfer in Rigid Ru(II)/Os(II) Dinuclear Complexes with Biscyclometalating Bridging Ligands Containing a Variable Number of Phenylene Units." Inorganic chemistry vol. 35,1 (1996): 136-142. doi: https://doi.org/10.1021/ic9503085
Barigelletti F, Flamigni L, Guardigli M, Juris A, Beley M, Chodorowski-Kimmes S, Collin JP, Sauvage JP. Energy Transfer in Rigid Ru(II)/Os(II) Dinuclear Complexes with Biscyclometalating Bridging Ligands Containing a Variable Number of Phenylene Units. Inorg Chem. 1996 Jan 03;35(1):136-142. doi: 10.1021/ic9503085. PMID: 11666175.
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Inorg Chem. 1996 Jan 03;35(1):136-142. doi: 10.1021/ic9503085.

Energy Transfer in Rigid Ru(II)/Os(II) Dinuclear Complexes with Biscyclometalating Bridging Ligands Containing a Variable Number of Phenylene Units.

Inorganic chemistry

Francesco Barigelletti, Lucia Flamigni, Massimo Guardigli, Alberto Juris, Marc Beley, Sandrine Chodorowski-Kimmes, Jean-Paul Collin, Jean-Pierre Sauvage

Affiliations

  1. Istituto FRAE-CNR, Via P. Gobetti 101, 40129 Bologna, Italy, Dipartimento Chimico "G. Ciamician", Università di Bologna, Via Selmi 2, 40126 Bologna, Italy, and Laboratoire de Chimie Organo-Minerale, Université Louis Pasteur, Faculté de Chimie, 1 rue Blaise Pascal, F-67008 Strasbourg, France.

PMID: 11666175 DOI: 10.1021/ic9503085

Abstract

We have prepared rodlike cyclometalated Ru(II)/Os(II) dinuclear complexes, (ttp)Ru(dpb-(ph)(n)()-dpb)Os(ttp)(2+), where the biscyclometalating bridging ligands contain dipyridylbenzene fragments, dbp, separated by a variable number, n, of phenylene spacers, and the terminal ligand is a terpyridine derivative [dpbH is di-2-pyridyl-1,3-benzene, ttp is 4'-p-tolyl-2,2':6',2"-terpyridine, and n = 0-2]. The rigid bridging ligands keep the metal centers at a distance r(MM) = 11, 15.5, and 20 Å, depending on n. Photoinduced energy transfer has been investigated by luminescence spectroscopy in nitrile solvents at room temperature and at 77 K (i.e., in frozen medium). According to a classical description of the process, the energy transfer occurs in a nearly activationless regime, is governed by electronic factors, and can be described in terms of the Dexter-type mechanism. The obtained energy transfer rates roughly span 3 orders of magnitude and indicate (i) that the temperature (i.e., the state of the solvent) has a small influence on the process and (ii) that the interposed phenylene spacers are weak attenuators of intercenter electronic coupling, H [H = H(0) exp(-betar(MM)), with beta approximately 0.33 Å(-)(1)].

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