Electronic structure and ultraviolet absorption spectrum of polyimide

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...

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Veröffentlicht in:	The Journal of chemical physics 1989-05, Vol.90 (9), p.5154-5160
Hauptverfasser:	LAFEMINA, J. P, ARJAVALINGAM, G, HOUGHAM, G
Format:	Artikel
Sprache:	eng
Schlagworte:	Applied sciences Exact sciences and technology Organic polymers Physicochemistry of polymers Properties and characterization
Online-Zugang:	Volltext
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Beschreibung
Zusammenfassung:	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.
ISSN:	0021-9606 1089-7690
DOI:	10.1063/1.456558