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TitleArylthienyl-vinyl-benzothiazoles as efficient second harmonic generators (SHG) for nonlinear optics
Author(s)Batista, Rosa Maria Ferreira
Costa, Susana P. G.
Belsley, M.
Raposo, M. Manuela M.
Nonlinear optics
Second Harmonic Generators
Issue date2018
PublisherMDPI AG
CitationBatista, R. M. F.; Costa, S. P. G.; Belsley, M.; Raposo, M. M. M.; Arylthienyl-vinyl-benzothiazoles as efficient second harmonic generators (SHG) for nonlinear optics. Proceedings of the 22nd International Electronic Conference on Synthetic Organic Chemistry, Sciforum Electronic Conferences Series, doi: 10.3390/ecsoc-22-05702.
Abstract(s)New push-pull second harmonic generation (SHG) chromophores 2 were synthesized in order to study their linear and nonlinear optical properties. The donor-acceptor π-conjugated systems 2 were prepared in good to excellent yields by a simple aldol-type condensation of the precursor aldehydes 1 with 6-nitro-2-methyl-1,3-benzothiazole in the presence of NaOH. Hyper-Rayleigh scattering in dioxane solutions was used to evaluate their second-order nonlinear optical properties. The experimental results showed that the optical (linear and nonlinear) properties are influenced by the electron-donor strength of the groups of the π-conjugated bridge. The vinyl-benzothiazole derivative 2b, with methoxyl as donor group, exhibited the largest first hyperpolarizability β (1660 × 10-30 esu, 40 times greater than the standard reference pNA molecule) and the highest decomposition temperature (Td = 360 ºC). The good balance between nonlinearity and thermal stability makes this compound a promising candidate as second harmonic generators (SHG) for nonlinear optics.
TypeConference paper
Publisher version
AccessOpen access
Appears in Collections:CDQuim - Comunicações e Proceedings

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