Books > Science & Mathematics > Physics > States of matter > Condensed matter physics (liquids & solids)
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Organic Crystals I: Characterization (Paperback, Softcover reprint of the original 1st ed. 1991)
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Organic Crystals I: Characterization (Paperback, Softcover reprint of the original 1st ed. 1991)
Series: Crystals, 13
Expected to ship within 10 - 15 working days
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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.
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