Structure of a zeolite ZSM-5-bithiophene complex as determined by high-resolution synchrotron X-ray powder diffraction

C. Eylem, J. A. Hriljac, V. Ramamurthy, D. R. Corbin, J. B. Parise

Research output: Contribution to journalArticle

7 Scopus citations

Abstract

The structure of a zeolite ZSM-5 complex with ca. 4 molecules/unit cell of bithiophene was determined by high-resolution synchrotron X-ray powder diffraction. It adopts monoclinic symmetry in space group P21/n (a unique) between room temperature and 25 K, with refined lattice parameters at 25 K of a = 20.0614(4), b = 19.8251(4), c = 13.3623(4) Å, and α = 90.848(2)°. Structural modeling and Rietveld refinements showed that there are two crystallographically unique bithiophene molecules, each with an occupancy factor of ca. 0.5. One bithiophene is localized at the center of the straight channels with one of the rings residing at the intersection with the sinusoidal channels. The other molecule lies in the sinusoidal channels and projects partially into the straight channels. The relationship between polythiophene chain length and the formation of conducting polythiophene molecular wires in the ZSM-5 framework is discussed.

Original languageEnglish (US)
Pages (from-to)844-849
Number of pages6
JournalChemistry of Materials
Volume8
Issue number4
DOIs
StatePublished - Apr 1996
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Chemistry

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