Cis-trans Photoisomerization in [Ru(DIP)2(MeOH)2][OTf]2: synthesis, NMR, X-ray structure of the trans-isomer and photophysical properties (Articolo in rivista)

Type
Label
  • Cis-trans Photoisomerization in [Ru(DIP)2(MeOH)2][OTf]2: synthesis, NMR, X-ray structure of the trans-isomer and photophysical properties (Articolo in rivista) (literal)
Anno
  • 2007-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1039/b701089c (literal)
Alternative label
  • H. Amouri; J. B. Waern; R. Caspar; A. Barbieri; C. Sabatini; A. Zanelli; F. Barigelletti (2007)
    Cis-trans Photoisomerization in [Ru(DIP)2(MeOH)2][OTf]2: synthesis, NMR, X-ray structure of the trans-isomer and photophysical properties
    in Dalton transactions (2003. Print)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • H. Amouri; J. B. Waern; R. Caspar; A. Barbieri; C. Sabatini; A. Zanelli; F. Barigelletti (literal)
Pagina inizio
  • 2179 (literal)
Pagina fine
  • 2186 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#note
  • In: Dalton Transactions, vol. 2007 pp. 2179 - 2186. RSC- The Royal Society of Chemistry, 2007. (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 21 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • 1. Univ Paris 06, UMR CNRS 7071, Lab Chim Inorgan & Mat Mol, F-75252 Paris 05, France 2. CNR, Ist Sintesi Organ & Fotoreattivita, I-40129 Bologna, Italy (literal)
Titolo
  • Cis-trans Photoisomerization in [Ru(DIP)2(MeOH)2][OTf]2: synthesis, NMR, X-ray structure of the trans-isomer and photophysical properties (literal)
Abstract
  • The first trans-ruthenium complex trans-[Ru(DIP)2(MeOH)2][OTf]2 (1b, where DIP = 4,7-diphenyl-1,10-phenanthroline) incorporating a -extended ligand was prepared via two methods: either photolysis of cis-[Ru(DIP)2(OTf)2] in MeOH-Et2O or via crystallization from MeOH-Et2O in direct sunlight. The X-ray molecular structure of 1b is reported and confirmed the trans geometry of the title compound. The cis-trans isomerization process was monitored by 1H-NMR and showed that 1b reverts back to cis-[Ru(DIP)2(MeOH)2][OTf]2 (1a) in methanol-d4 after 15 h at 55 °C or several days at room temperature. The absorption spectra recorded in MeOH showed a bathochromic shift of the MLCT band of the trans-isomer 1b relative to that of the cis complex 1a. Interestingly at 77 K the emission spectrum of 1b is red shifted compared to the cis analog 1a. A rational explanation in terms of the energy of the excited states in the cis- and trans-isomers is proposed to explain this behavior. (literal)
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