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

doi:10.1016/j.ultramic.2003.08.007

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

Physics

Research output: Contribution to journal › Article › peer-review

3 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 language	English (US)
Pages (from-to)	145-150
Number of pages	6
Journal	Ultramicroscopy
Volume	98
Issue number	2-4
DOIs	https://doi.org/10.1016/j.ultramic.2003.08.007
State	Published - Jan 2004

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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10.1016/j.ultramic.2003.08.007

Cite this

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title = "Structural study of new hydrocarbon nano-crystals by energy-filtered electron diffraction",

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=6.03{\AA}, b=6.23{\AA}, c=13.86{\AA}, 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.",

keywords = "006, 011, 61.14.Dc, 61.14.Lj, 61.66.Hq, Electron crystallography, Electron diffraction, Electron microscopy, Molecular structure, Structure of organic crystal",

author = "Wu, {J. S.} and N. Melcer and Sharp, {W. P.} and M. O'Keeffe and John Spence and Yaghi, {O. M.}",

year = "2004",

month = jan,

doi = "10.1016/j.ultramic.2003.08.007",

language = "English (US)",

volume = "98",

pages = "145--150",

journal = "Ultramicroscopy",

issn = "0304-3991",

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T1 - Structural study of new hydrocarbon nano-crystals by energy-filtered electron diffraction

AU - Wu, J. S.

AU - Melcer, N.

AU - Sharp, W. P.

AU - O'Keeffe, M.

AU - Spence, John

AU - Yaghi, O. M.

PY - 2004/1

Y1 - 2004/1

N2 - 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.

AB - 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.

KW - 006

KW - 011

KW - 61.14.Dc

KW - 61.14.Lj

KW - 61.66.Hq

KW - Electron crystallography

KW - Electron diffraction

KW - Electron microscopy

KW - Molecular structure

KW - Structure of organic crystal

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UR - http://www.scopus.com/inward/citedby.url?scp=1842525240&partnerID=8YFLogxK

U2 - 10.1016/j.ultramic.2003.08.007

DO - 10.1016/j.ultramic.2003.08.007

M3 - Article

C2 - 15046793

AN - SCOPUS:1842525240

SN - 0304-3991

VL - 98

SP - 145

EP - 150

JO - Ultramicroscopy

JF - Ultramicroscopy

IS - 2-4

ER -

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

Abstract

Keywords

ASJC Scopus subject areas

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