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Proceedings Paper

Second-order nonlinearity in mixed-valence metal chromophores
Author(s): W. M. Laidlaw; Robert G. Denning; Thierry Verbiest; E. Chauchard; Andre P. Persoons
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Paper Abstract

Molecules with a large second order electrical polarizability, (beta) , should have both strong electronic acentricity and intense charge-transfer transitions. We report values of (beta) for a number of mixed valency metal complexes in which charge transfer occurs between two redox active metal ions within the same molecule. Because these species are ions the EFISH experiment is inapplicable, so our measurements rely on Hyper-Raleigh Scattering. The compounds discussed here contain metal ions linked by a cyanide bridge. Charge asymmetry in the bridge is maintained by stabilizing the lower oxidation state with (pi) -acceptor ligands and the higher oxidation state with (sigma) -donor ligands. Results are reported for five homo and hetero-bimetallic ions in a variety of solvents. (beta) values are about 10-28 e.s.u., at 1.06 micrometers , and are comparable with those of organic compounds with larger donor-acceptor separations.

Paper Details

Date Published: 15 May 1994
PDF: 6 pages
Proc. SPIE 2143, Organic, Metallo-Organic, and Polymeric Materials for Nonlinear Optical Applications, (15 May 1994); doi: 10.1117/12.173817
Show Author Affiliations
W. M. Laidlaw, Inorganic Chemistry Lab. (United Kingdom)
Robert G. Denning, Inorganic Chemistry Lab. (United Kingdom)
Thierry Verbiest, Univ. of Leuven (Belgium)
E. Chauchard, Univ. of Leuven (Belgium)
Andre P. Persoons, Univ. of Leuven (Belgium)

Published in SPIE Proceedings Vol. 2143:
Organic, Metallo-Organic, and Polymeric Materials for Nonlinear Optical Applications
Seth R. Marder; Joseph W. Perry, Editor(s)

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