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https://hdl.handle.net/1822/43862
Título: | Push–pull second harmonic generation chromophores bearing pyrrole and thiazole heterocycles functionalized with several acceptor moieties: Syntheses and characterization |
Autor(es): | Castro, Maria Cidália Rodrigues Belsley, M. Raposo, M. Manuela M. |
Palavras-chave: | Clauson-Kaas pyrrole synthesis Push-pull heterocyclic systems Thiazole Auxiliary acceptor heterocycle First hyperpolarizability (beta) Thermal stability First hyperpolarizability (β) |
Data: | Jan-2016 |
Editora: | Elsevier 1 |
Revista: | Dyes and Pigments |
Citação: | Castro, M. C. R., Belsley, M., & Raposo, M. M. M. (2016). Push-pull second harmonic generation chromophores bearing pyrrole and thiazole heterocycles functionalized with several acceptor moieties: Syntheses and characterization. Dyes and Pigments, 128, 89-95. doi: 10.1016/j.dyepig.2016.01.015 |
Resumo(s): | A new series of pushepull nonlinear optical (NLO) chromophores 2 and 3 were synthesized in order to study the variations produced in the optical properties of the compounds by linking different electron accepting moieties to the pyrrolyl-thiazole system at position 5 of the electron deficient thiazole heterocycle. The final donore-acceptor systems 3aec were synthesized by a modification of the PaaleKnorr synthesis (the Clauson-Kaas reaction) followed by Knoevenagel reaction of the precursor aldehydes 2aec with active methylene molecules. Hyper-Rayleigh scattering in dioxane solutions using a fundamental wavelength of 1064 nm was employed to evaluate their second-order nonlinear optical properties. An indanone dicyanovinyl derivative 3c exhibited the largest first hyperpolarizability (beta = 970x10 -30 esu, using the T convention) as well the highest value of decomposition, Td = 300 C thus indicating its potential application as a second harmonic generation (SHG) chromophore. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/43862 |
DOI: | 10.1016/j.dyepig.2016.01.015 |
ISSN: | 0143-7208 |
Versão da editora: | www.sciencedirect.com/science/article/pii/S0143720816000267 |
Arbitragem científica: | yes |
Acesso: | Acesso restrito UMinho |
Aparece nas coleções: | CDF - FAMO - Artigos/Papers (with refereeing) CDQuim - Artigos (Papers) |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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Cidalia_DyesPig_2016.pdf Acesso restrito! | 443,89 kB | Adobe PDF | Ver/Abrir |