Synthesis and characterization of 3-hexyl multi-substituted alpha,omega-diformyl-alpha-oligothiophenes (n=3, 6, 8) (Articolo in rivista)

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  • Synthesis and characterization of 3-hexyl multi-substituted alpha,omega-diformyl-alpha-oligothiophenes (n=3, 6, 8) (Articolo in rivista) (literal)
Anno
  • 1997-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1002/macp.1997.021980413 (literal)
Alternative label
  • Thomas Olinga, Silvia Destri*, William Porzio, Antonio Selva (1997)
    Synthesis and characterization of 3-hexyl multi-substituted alpha,omega-diformyl-alpha-oligothiophenes (n=3, 6, 8)
    in Macromolecular chemistry and physics (Print); Wiley-VCH - Weinheim, Wheinheim (Germania)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Thomas Olinga, Silvia Destri*, William Porzio, Antonio Selva (literal)
Pagina inizio
  • 1091 (literal)
Pagina fine
  • 1107 (literal)
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  • http://onlinelibrary.wiley.com/doi/10.1002/macp.1997.021980413/pdf (literal)
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  • 198 (literal)
Rivista
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  • 16 (literal)
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  • 4 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Silvia Destri, William Porzio- Istituto di Chimica delle Macromolecole del C.N.R., via E. Bassini 15,I-20133 Milan,Italy Antonio Selva - Centro di Studio sulle Sostanze Organiche Naturali del C.N.R., via Mancinelli 7,1-20131,Milan, Italy t. Olinga -Present address: Institut Charles Sadron (CNRS), 6 rue Boussingault, 67083 Strasbourg, Cedex-France (literal)
Titolo
  • Synthesis and characterization of 3-hexyl multi-substituted alpha,omega-diformyl-alpha-oligothiophenes (n=3, 6, 8) (literal)
Abstract
  • The synthesis and characterization of a series of thienylenic a,o-diformyl-a-oligothiophenes with 3, 6 and 8 residues is reported. The chemical structure was determined by H NMR, FT-IR, mass and GPC analyses, while the electronic properties in the neutral state were studied by UV-Vis spectroscopy both in solution and in the solid state. In the UV-Us spectra of thin films, the vibronic structure is observed. The pronounced red-shift of the absorption maximum, with respect to spectra of unsubstituted a-oligothiophenes, is indicative of a contribution of carbonyl n-electrons to the overall delocalization via a mesomeric effect leading to a more planar structure. The solid state aggregation was investigated by XRD spectroscopy and optical microscopy. We observed for the longest terms a smectic arrangement typical of liquid crystalline compounds and a tendency to self-assembling onto hydrophilic substrates, forming angles ranging from 40-50\" with respect to the normal to the surface. (literal)
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