Platinum(II) complexes with cyclometallated 5-pi-delocalized-donor-1,3-di(2-pyridyl)benzene ligands as efficient phosphors for NIR-OLEDs (Articolo in rivista)

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  • Platinum(II) complexes with cyclometallated 5-pi-delocalized-donor-1,3-di(2-pyridyl)benzene ligands as efficient phosphors for NIR-OLEDs (Articolo in rivista) (literal)
Anno
  • 2014-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1039/c3tc32086c (literal)
Alternative label
  • Nisic, Filippo; Colombo, Alessia; Dragonetti, Claudia; Roberto, Dominique; Valore, Adriana; Malicka, Joanna M.; Cocchi, Massimo; Freeman, Gemma R.; Williams, J. A. Gareth (2014)
    Platinum(II) complexes with cyclometallated 5-pi-delocalized-donor-1,3-di(2-pyridyl)benzene ligands as efficient phosphors for NIR-OLEDs
    in JOURNAL OF MATERIALS CHEMISTRY C
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Nisic, Filippo; Colombo, Alessia; Dragonetti, Claudia; Roberto, Dominique; Valore, Adriana; Malicka, Joanna M.; Cocchi, Massimo; Freeman, Gemma R.; Williams, J. A. Gareth (literal)
Pagina inizio
  • 1791 (literal)
Pagina fine
  • 1800 (literal)
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  • 2 (literal)
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  • 10 (literal)
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  • 10 (literal)
Note
  • ISI Web of Science (WOS) (literal)
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  • University of Milan; ISTM CNR; Consorzio MIST ER Scrl; Consiglio Nazionale delle Ricerche (CNR); Durham University (literal)
Titolo
  • Platinum(II) complexes with cyclometallated 5-pi-delocalized-donor-1,3-di(2-pyridyl)benzene ligands as efficient phosphors for NIR-OLEDs (literal)
Abstract
  • Two new pincer proligands, namely 5-(p-(N, N-diphenylamino) phenylethynyl)-1,3-di(2-pyridyl) benzene (HL1) and trans-5-(p-(N, N-diphenylamino) styryl-1,3-di(2-pyridyl) benzene (HL2) were prepared together with their N boolean AND C boolean AND N-coordinated cyclometallated platinum(II) complexes (PtLX)-X-1 (X = Cl, NCS) and (PtLCl)-Cl-2. Both ligands are intensely luminescent in solution (quantum yields > 0.8). (PtLX)-X-1 complexes display high quantum yields in solution whereas that of (PtLCl)-Cl-2 is very low due to the ease with which trans to cis isomerisation of the diphenylaminostyryl C=C bond occurs. Distinct sets of emission bands attributable to the cis and trans forms are observable in glass at 77 K, the assignments being supported by TD-DFT calculations. Organic light-emitting diodes (OLEDs) have been prepared using the new compounds as phosphorescent emitters. Remarkably, despite the inferior quantum yield of (PtLCl)-Cl-2 in solution, the best electroluminescence quantum efficiencies are obtained with this complex, which emerges as an excellent candidate for the preparation of NIR-OLEDs. (literal)
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