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Proceedings Paper

Electronic Properties Of Oligodiacetylenes
Author(s): H. Sixl; C. Kollmar; R. Warta
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Paper Abstract

Recent spectroscopic investigations and model calculations concerning the short chain reaction intermediate (oligodiacetylenes) of the solid state polymerization in diacetylene crystals are discussed. The oligodiacetylenes are best described by diradical (DR), asymetric carbene (AC), dicarbene (DC) and stable oligomer (SO) molecules of different chain lengths. Their structures and properties are investigated in detail by electron spin resonance (ESR) and optical absorption and emission spectroscopy. Theoretical model calculations are performed to describe the spectroscopic features of the oligodiacetylenes. The transition from diradicals to dicarbenes observed at a critical chain length of six repeat units is quantitatively explained using a configuration model. Triplet excition-polaron exitations are shown to be closely related to charged polarons and to dipole and quadrupole excitations relevant for nonlinear optical effects.

Paper Details

Date Published: 21 December 1988
PDF: 9 pages
Proc. SPIE 0971, Nonlinear Optical Properties of Organic Materials, (21 December 1988); doi: 10.1117/12.948229
Show Author Affiliations
H. Sixl, Hoechst AG (Germany)
C. Kollmar, Universitat Stuttgart (Germany)
R. Warta, Universitat Stuttgart (Germany)

Published in SPIE Proceedings Vol. 0971:
Nonlinear Optical Properties of Organic Materials
Garo Khanarian, Editor(s)

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