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Proceedings Paper

Reversible redox-switching of first hyperpolarizability studied by hyper-Rayleigh scattering
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Paper Abstract

Two examples of efficient and reversible switching of the first hyperpolarizability of charge-transfer metalorganic species are presented. The charge transfer is between a metalorganic donor unit and an organic acceptor. In one case, the donor is a ruthenium(I) pentammine complex, the acceptor is an N-methyl-4,4'-bipyridinium ligand. Oxidizing the ruthenium(II) to ruthenium(III) changes the donor to an acceptor and destroys the charge transfer, as evidence by the disappearance of the charge transfer band in linear absorption spectroscopy. In hyper-Rayleigh scattering, a reduction in first hyperpolarizability of at least an order of magnitude is observed. In a second case, the donor is an octamethylferrocene unit, while the donor is a nitro group on a thiophene. Again, oxidizing the octamethylferrocene to octamethylferrocenium reduces the hyperpolarizability with more than an order of magnitude. Both redox processes are fully reversible.

Paper Details

Date Published: 18 December 2002
PDF: 7 pages
Proc. SPIE 4798, Linear and Nonlinear Optics of Organic Materials II, (18 December 2002); doi: 10.1117/12.451928
Show Author Affiliations
Inge Asselberghs, Katholieke Univ. Leuven (Belgium)
Koen J. Clays, Katholieke Univ. Leuven (Belgium)
Andre P. Persoons, Katholieke Univ. Leuven (Belgium)

Published in SPIE Proceedings Vol. 4798:
Linear and Nonlinear Optics of Organic Materials II
Manfred Eich; Mark G. Kuzyk, Editor(s)

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