ParkinsonFranceV1, Hal, Curation, bibRecord, 000334

ELECTRON MICROSCOPIC IDENTIFICATION AND CHEMICAL CONSEQUENCES OF EXTENDED DEFECTS IN ORGANIC MOLECULAR CRYSTALS

Identifieur interne : 000334 ( Hal/Curation ); précédent : 000333; suivant : 000335

ELECTRON MICROSCOPIC IDENTIFICATION AND CHEMICAL CONSEQUENCES OF EXTENDED DEFECTS IN ORGANIC MOLECULAR CRYSTALS

Auteurs : G. Parkinson ; Edward Davies

Source :

RBID : Hal:jpa-00217355

Abstract

The course of organic reactions in the solid state may be successfully predicted in many cases by the principle of topochemical preformation, which states that reactions in crystals proceed with a minimum of atomic and molecular movement. However, well defined exceptions to this rule, notably in the substituted anthracenes, have pointed to the involvement of extended defects in such reactions. Transmission electron microscopy has been used to characterize linear and planar faults in organic crystals and has also shed light on phase transitions in these materials. The stress-induced transformation undergone by anthracene is described in detail and the concept of a new family of crystal defects, made feasible by the nature of packing between organic molecules, is outlined.

Url:

https://hal.archives-ouvertes.fr/jpa-00217355

DOI: 10.1051/jphyscol:1978209

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Le document en format XML

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<front><div type="abstract" xml:lang="en">The course of organic reactions in the solid state may be successfully predicted in many cases by the principle of topochemical preformation, which states that reactions in crystals proceed with a minimum of atomic and molecular movement. However, well defined exceptions to this rule, notably in the substituted anthracenes, have pointed to the involvement of extended defects in such reactions. Transmission electron microscopy has been used to characterize linear and planar faults in organic crystals and has also shed light on phase transitions in these materials. The stress-induced transformation undergone by anthracene is described in detail and the concept of a new family of crystal defects, made feasible by the nature of packing between organic molecules, is outlined.</div>
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<abstract xml:lang="en">The course of organic reactions in the solid state may be successfully predicted in many cases by the principle of topochemical preformation, which states that reactions in crystals proceed with a minimum of atomic and molecular movement. However, well defined exceptions to this rule, notably in the substituted anthracenes, have pointed to the involvement of extended defects in such reactions. Transmission electron microscopy has been used to characterize linear and planar faults in organic crystals and has also shed light on phase transitions in these materials. The stress-induced transformation undergone by anthracene is described in detail and the concept of a new family of crystal defects, made feasible by the nature of packing between organic molecules, is outlined.</abstract>
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ELECTRON MICROSCOPIC IDENTIFICATION AND CHEMICAL CONSEQUENCES OF EXTENDED DEFECTS IN ORGANIC MOLECULAR CRYSTALS

ELECTRON MICROSCOPIC IDENTIFICATION AND CHEMICAL CONSEQUENCES OF EXTENDED DEFECTS IN ORGANIC MOLECULAR CRYSTALS

Source :

Abstract

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Links to Exploration step

Le document en format XML

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