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Article Dans Une Revue Dyes & Pigments Année : 2012

The synthesis of tetrahedral bipyridyl metallo-octupoles with large second- and third-order nonlinear optical properties

Résumé

Two new 4,4′-bis(donor)-6,6′-diphenyl- 2,2′-bipyridine ligands and their corresponding D2d (CuI, AgI, ZnII) octupolar metal complexes were synthesized, and their linear and nonlinear optical properties were investigated. A single crystal X-ray structure was also determined for the bis[4,4′-bis(diethylaminostyryl)-6,6′-diphenyl-bipyridine]copper(I) complex, which revealed a distorded pseudo-tetrahedral geometry. Molecular second-order nonlinear optical properties were determined for the complexes using the Harmonic Light Scatterring technique at 1.91 μm. These metallo-chromophores display large first hyperpolarizabilities β1.91 in the range of 211-340 × 10−30 esu, which increase with the Lewis acidity of the metal ion. The two-photon absorption properties of the bipyridyl ligands and related complexes were determined using either the two-photon emission method for fluorescent compounds or the open aperture Z-scan technique for non emissive ones. The complexes display red-shifted two-photon absorption bands compared to their metal-ion free chromophores, as well as a large increase of the maximum two-photon absorption cross-sections.

Dates et versions

hal-00831077 , version 1 (06-06-2013)

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Huriye Akdas-Killig, Jean-Pierre Malval, Fabrice Morlet-Savary, Anu Singh, Loïc Toupet, et al.. The synthesis of tetrahedral bipyridyl metallo-octupoles with large second- and third-order nonlinear optical properties. Dyes & Pigments, 2012, 92 (1), pp.681-688. ⟨10.1016/j.dyepig.2011.06.013⟩. ⟨hal-00831077⟩
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