Infrared spectroscopy of thiophene up to 30 GPa. Polymerization after a pressure! cycle to 16 GPa

Ph. Pruzan Physique des Milieux Condensés, Université P. & M. Curie, B 77, 4, place Jussieu, F-75252, PARIS, Cedex 05

J. C. Chervin Physique des Milieux Condensés, Université P. & M. Curie, B 77, 4, place Jussieu, F-75252, PARIS, Cedex 05

J. P. Forgerit LASIR (CARS, LP 264), 2, rue H. Dunant, F-94230, THIAIS, France

Abstract

Visual observations and Fourier-transform infrared spectroscopy were used to investigate thiophene (C₄H₄S) up to 30 GPa. A second-order phase transition was found around 6 GPa. Above 16 GPa thiophene undergoes an irreversible transformation. The product recovered at ambient exhibits the characteristics of a polymer.

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Infrared spectroscopy of thiophene up to 30 GPa. Polymerization after a pressure! cycle to 16 GPa

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Infrared spectroscopy of thiophene up to 30 GPa. Polymerization after a pressure! cycle to 16 GPa

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