Electronic structure change at a phase transition in a polydiacetylene crystal
- 15 June 1977
- journal article
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 66 (12) , 5520-5525
Abstract
A Raman spectral study is reported for a polydiacetylene crystal with substituent group (CH2)4OCONHC6H5. At low temperatures (<100 K) or high pressures (≳1.5 kbar) a phase change occurs accompanied by changes in the electronic structure of the polymer backbone. The Raman evidence suggests that the high temperature phase is best described with a butatriene bonding sequence [-RC=C=C=CR-n] while the low temperature (or high pressure) phase is best described with an acetylene bonding sequence [-RC–C≡C–CR-n].Keywords
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