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Infrared study of phase transition and chemical reaction in tetracyanoethylene under high pressure

โœ Scribed by H. Yamawaki; K. Aoki; Y. Kakudate; M. Yoshida; S. Usuba; S. Fujiwara

Publisher
Elsevier Science
Year
1992
Tongue
English
Weight
315 KB
Volume
198
Category
Article
ISSN
0009-2614

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โœฆ Synopsis

Infrared spectra of the cubic and the monoclinic phases of tetracyanoethylene have been investigated as a function of pressure at room temperature. The cubic phase, a low-temperature phase stable below 318 K at ambient pressure, appeared to be stable up to 6 GPa. The high-temperature monoclinic form metastably obtained at room temperature showed a structural transformation near 3 GPa. This high-pressure phase, showing an infrared spectrum different from that of the cubic phase, transformed reversibly to the monoclinie phase on unloading. Polymerization occurred in both the cubic and high-pressure molecular phases near 6 GPa.

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