Paperback(Softcover reprint of the original 1st ed. 1991)

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Overview

Lattice defects of organic molecular crystals affect their optical or electrical properties by changing the local energy structure. Lattice defects also playa very important role in the chemical and physical properties, for example, as an active site of a catalyst or an initiating point of a solid state reaction. However, very little has been reported on the defect structure of real organic crystals. In the past ten years it became clear that the origin and the structure of the defects depend on the geometrical and chemical nature of the building units of the crystal, the molecules. Molecular size, form and anisotropy, charge distribution, etc. cause the characteristic structure of the defect. Accordingly, a defect structure found in one compound may not be found in others. The defect structure of an organic crystal cannot be defined solely by the displacement of the molecular center from the normal lattice site. A rotational displacement of a molecule is frequently accompanied by a parallel shift of the molecular center. In addition to the usual geometrical crystallographic defects, chemical defects are important too which originate, for example, from differences in the substitution sites of molecules carrying side groups. In order to reveal such defect structures, direct imaging of molecules by high resolution electron microscopy is the only direct method.

Product Details

ISBN-13: 9783642762550
Publisher: Springer Berlin Heidelberg
Publication date: 12/16/2011
Series: Crystals , #13
Edition description: Softcover reprint of the original 1st ed. 1991
Pages: 164
Product dimensions: 6.10(w) x 9.25(h) x 0.01(d)

Table of Contents

Epitaxial Growth of Organic Thin Films and Characterization of Their Defect Structures by High-Resolution Electron Microscopy.- Structure, Stability and Crystal Growth of Polymorphs and Polytypes of Long-Chain Aliphatic Compounds.- X-Ray Topography of Organic Crystals.- Author Index Volumes 1–13.

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