Structural study of new hydrocarbon nano-crystals by energy-filtered electron diffraction

J. S. Wu, N. Melcer, W. P. Sharp, M. O'Keeffe, John Spence, O. M. Yaghi

Research output: Contribution to journalArticle

2 Scopus citations

Abstract

A new brittle hydrocarbon has been successfully synthesized in polycrystalline form, and its crystal structure solved by quantitative electron diffraction. By 3D tilting of the nano-crystals, the lattice type and unit cell parameters were determined. (Triclinic, a=6.03Å, b=6.23Å, c=13.86Å, α=87.26°, β=106.69°, and γ=119.01°. ) Spot diffraction patterns were obtained at -165°C using the Koehler selected-area mode on a LEO 912 TEM fitted with an omega in-column elastic energy filter. The direct methods algorithm was then applied to merged intensities and a trial structure obtained assuming single scattering. This was further refined to obtain good agreement with a small residual of about 10% using multiple scattering calculations. A diagram of the proposed structure is given.

Original languageEnglish (US)
Pages (from-to)145-150
Number of pages6
JournalUltramicroscopy
Volume98
Issue number2-4
DOIs
StatePublished - Jan 1 2004

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Keywords

  • 006
  • 011
  • 61.14.Dc
  • 61.14.Lj
  • 61.66.Hq
  • Electron crystallography
  • Electron diffraction
  • Electron microscopy
  • Molecular structure
  • Structure of organic crystal

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Instrumentation

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