Polymorphism in pentacene

C. C. Mattheus, A. B. Dros, J. Baas, A. Meetsma, J. L. de Boer, T. T. M. Palstra

OnderzoeksoutputAcademicpeer review

362 Citaten (Scopus)
306 Downloads (Pure)

Samenvatting

Pentacene, C22H14, crystallizes in different morphologies characterized by their d(001)-spacings of 14.1, 14.5, 15.0 and 15.4 Angstrom. We have studied the crystal structure of the 14.1 and 14.5 Angstrom d-spacing morphologies grown by vapour transport and from solution. We rnd a close correspondence between the 14.1 Angstrom structure reported by Holmes, Kumaraswamy, Matzeger & Vollhardt [Chem. Eur. J. (1999), 5, 3399-3412] and the 14.5 Angstrom structure reported by Campbell, Monteath Robertson & Trotter [Acta Cryst. (1961), 14, 705-711]. Single crystals commonly adopt the 14.1 Angstrom d-spacing morphology with an inversion centre on both molecules in the unit cell. Thin films grown on SiO2 substrates above 350 K preferentially adopt the 14.5 Angstrom d-spacing morphology, with a slightly smaller unit-cell volume.
Originele taal-2English
Pagina's (van-tot)939 - 941
Aantal pagina's3
TijdschriftActa Crystallographica Section C: Crystal Structure Communications
Volume57
DOI's
StatusPublished - aug.-2001

Keywords

  • EVAPORATED PENTACENE
  • SUPERCONDUCTIVITY
  • INJECTION
  • FILMS

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