Switching of emissive and NLO properties in push-pull chromophores with crescent PPV-like structures (Articolo in rivista)

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  • Switching of emissive and NLO properties in push-pull chromophores with crescent PPV-like structures (Articolo in rivista) (literal)
Anno
  • 2013-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1039/C2CP43140H (literal)
Alternative label
  • Carmine Coluccini, Arvind K. Sharma, Marco Caricato, Angelo Sironi, Elena Cariati, Stefania Righetto, Elisa Tordin, Chiara Botta, Alessandra Forni, Dario Pasini (2013)
    Switching of emissive and NLO properties in push-pull chromophores with crescent PPV-like structures
    in PCCP. Physical chemistry chemical physics (Print); The Royal Society of Chemistry, Cambridge (Regno Unito)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Carmine Coluccini, Arvind K. Sharma, Marco Caricato, Angelo Sironi, Elena Cariati, Stefania Righetto, Elisa Tordin, Chiara Botta, Alessandra Forni, Dario Pasini (literal)
Pagina inizio
  • 1666 (literal)
Pagina fine
  • 1674 (literal)
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  • http://pubs.rsc.org (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 15 (literal)
Rivista
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  • 9 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Department of Chemistry, University of Pavia, Viale Taramelli, 10-27100 Pavia, Italy Department of Chemistry, University of Milano and UdR dell'INSTM di Milano via Golgi, 19-20133 Milano, Italy Istituto per lo Studio delle Macromolecole (ISMAC), CNR, Via Bassini 15, 20133 Milano, Italy Institute of Molecular Sciences and Technologies (ISTM), CNR, Via Golgi 19, 20133 Milano, Italy INSTM Research Unit, University of Pavia, Italy (literal)
Titolo
  • Switching of emissive and NLO properties in push-pull chromophores with crescent PPV-like structures (literal)
Abstract
  • We report on a series of novel homologous push-pull compounds, in which identical donor (a dimethylamino) and acceptor (a malonate ester) functionalities endcap crescent PPV fragments, bearing, respectively, 1, 2 and 3 p-phenylenevinylene units in direct linear conjugation (compounds 7-9). The three compounds exhibit striking differences in their linear and nonlinear optical properties. The shorter compound 7 exhibits aggregation-induced emission with a strong luminescence in the solid state (blue emission, photoluminescence quantum yield 38%), and it is nonemissive in solution; the more extended conjugated systems 8 and 9 show classical aggregation-caused quenching in the solid state, while high quantum yield photoluminescence (21 and 93% in toluene) is restored in diluted solutions, through mechanisms involving intramolecular charge transfer in the excited states. EFISH measurements in solutions demonstrate a strong solvent and concentration dependence. As rationalized with the aid of molecular modelling, compounds 8 and, more markedly, 9 aggregate in stable centrosymmetric dimers in solution. (literal)
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