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Proceedings Paper

Transition moments in optical spectroscopy
Author(s): Erik W. Thulstrup
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Paper Abstract

Electronic and vibrational transitions are characterized not only by energy and intensity, but also by direction. The measurement of transition moment directions in absorption is often experimentally simple and may provide essential information for assignment and recognition of transitions. It may also be used for determination of molecular alignment, structure, and conformation. Two-photon processes, such as luminescence, may provide even more detailed information of this kind. Applications of the techniques are found areas like materials science, microelectronics, and biochemistry and physics. The experimental determination of moment directions is frequently based on production of aligned samples, either by photoselection or by the use of anisotropic solvents, such as liquid crystals or stretched polymers. Two examples from absorption spectroscopy are used to illustrate the wide applicability of a simple, but frequently overlooked, experimental technique, as well as methods for interpretation of the spectra.

Paper Details

Date Published: 1 March 1992
PDF: 8 pages
Proc. SPIE 1575, 8th Intl Conf on Fourier Transform Spectroscopy, (1 March 1992); doi: 10.1117/12.56313
Show Author Affiliations
Erik W. Thulstrup, Royal Danish School of Educational Studies (United States)

Published in SPIE Proceedings Vol. 1575:
8th Intl Conf on Fourier Transform Spectroscopy
Herbert Michael Heise; Ernst Heiner Korte; Heinz W. Siesler, Editor(s)

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