Synthesis and crystal structure and optical properties of fluorenic-core oligomers (Articolo in rivista)

Type
Label
  • Synthesis and crystal structure and optical properties of fluorenic-core oligomers (Articolo in rivista) (literal)
Anno
  • 2002-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1039/B109089P (literal)
Alternative label
  • Destri S., Pasini M., Botta C., Porzio W., Bertini F., Marchiò L. (2002)
    Synthesis and crystal structure and optical properties of fluorenic-core oligomers
    in Journal of materials chemistry (Print)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Destri S., Pasini M., Botta C., Porzio W., Bertini F., Marchiò L. (literal)
Pagina inizio
  • 924 (literal)
Pagina fine
  • 933 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
  • http://pubs.rsc.org/en/content/articlepdf/2002/jm/b109089p (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 12 (literal)
Rivista
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Istituto di Chimica delle Macromolecole del C.N.R; Dipartimento di Chimica Generale ed Inorganica, Chimica Analitica, Chimica Fisica, Università di Parma (literal)
Titolo
  • Synthesis and crystal structure and optical properties of fluorenic-core oligomers (literal)
Abstract
  • Fluorenic core oligomers, displaying interesting PL properties, have been synthesized by organometallic route. The crystal and molecular structure of a fluorene derivative and three omologous oligomers has been studied. Spiro-derivative of fluorene dibromine shows a very strong interaction among H and Br atoms. The thienyl ending oligomer with spiro-substituent adopt a particular herring-bone arrangement with overlap of only end-thienyl residues, conformationally disordered. The crystal of all-phenyl derivative consists of the packing of discrete molecules cofacially arranged. The molecule with linear alkyl chains onto the 9 position of fluorenic core and thienyl ring as end-group exhibits polymorphism and its crystal structure, tetragonal, is very peculiar because of the unclose packing allowing a good separation among adjacent thienyl rings.The absorption and emission properties of this series were investigated and the electroluminescence of single- layer devices was characterized. The PL properties of the molecules are strongly dependent on their structural organization, displaying a red-shift of the emission from the amorphous phase, to the crystalline structure, to the aggregated form. A comparison of the packing of these oligomers and oligothienylenes fully accounts for the optical properties of the reported molecules. (literal)
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