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|Title:||Arylthienyl-vinyl-benzothiazoles as efficient second harmonic generators (SHG) for nonlinear optics|
|Author(s):||Batista, Rosa Maria Ferreira|
Costa, Susana P. G.
Raposo, M. Manuela M.
Second Harmonic Generators
|Citation:||Batista, 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.|
|Appears in Collections:||CDQuim - Comunicações e Proceedings|
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