Electronic structure and ultraviolet absorption spectrum of polyimide
- 1 May 1989
- journal article
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 90 (9) , 5154-5160
- https://doi.org/10.1063/1.456558
Abstract
The ultraviolet absorption spectra for polyimide and several polyimide model compounds have been measured and the spectroscopically parametrized CNDO/S3 model is used to provide a detailed quantitative description of the spectra. Analysis of the optical absorption spectrum yields a value of 30° for the phenylimide torsional angle in these systems. In addition, the ultraviolet absorptions are found to be intramolecular charge transfer transitions.Keywords
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