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2005-05-20 - Article/Dans un journal avec peer-review - Anglais - 14 page(s)

Lehmann M., Kestemont G., Gomez Aspe R., Buess-Herman Claudine, Koch M.J.H., Debije M.G., Piris J., de Haas M.P., Warman J.M., Watson M.D., Lemaur Vincent , Cornil Jérôme , Geerts Yves, Gearba R., Ivanov D.A., "High Charge Carrier Mobility in p-Deficient Discotic Mesogens: Design and Structure-Property Relationship" in Chemistry : A European Journal, 11, 11, 3349-3362

  • Edition : Wiley
  • Codes CREF : Physique de l'état solide (DI1261), Chimie quantique (DI1321), Chimie organique (DI1313)
  • Unités de recherche UMONS : Chimie des matériaux nouveaux (S817)
  • Instituts UMONS : Institut de Recherche en Science et Ingénierie des Matériaux (Matériaux)
Texte intégral :

Abstract(s) :

(Anglais) Hexaazatrinaphthylene (HATNA) derivatives with six alkylsulfanyl chains of different length (hexyl, octyl, decyl and dodecyl) have been designed to obtain new potential electron-carrier materials. The electron-deficient nature of these compounds has been demonstrated by cyclic voltammetry. Their thermotropic behaviour has been studied by means of differential scanning calorimetry and polarised optical microscopy. The supramolecular organisation of these discotic molecules has been explored by temperature-dependent X-ray diffraction on powders and oriented samples. In addition to various liquid crystalline columnar phases (Colhd, Colrd), an anisotropic plastic crystal phase is demonstrated to exist. The charge-carrier mobilities have been measured with the pulse-radiolysis time-resolved microwave-conductivity technique. They are found to be higher in the crystalline than in the liquid crystalline phases, with maximum values of approximately 0.9 and 0.3 cm2?V-1?s-1, respectively, for the decylsulfanyl derivative. Mobilities strongly depend on the nature of the side chains.

Notes :
  • (Anglais) Lecture en ligne: http://onlinelibrary.wiley.com/doi/10.1002/chem.200400586/pdf
  • (Anglais) Publié en ligne le 30 mars 2005
Identifiants :
  • DOI : 10.1002/chem.200400586