Publicação
5´-alkoxy-2,2´-bithiophene azo dyes: a novel promising series of NLO chromophores
| Resumo: | A series of bithienyl azo dyes has been prepared from their corresponding coupling components, 5-alkoxy-2,2´-bithiophenes. The solvatochromic behavior of the compounds was investigated. The hyperpolarizabilities β of derivatives 3-5 were measured using hyper-Rayleigh scattering and thermogravimetric analysis (TGA) was used to evaluate their thermal stability. The experimental results indicate that, good nonlinearity-thermal stability is well balanced for azo-bithiophene NLO-chromophores 3-5 making them good candidates for NLO applications. |
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| Autores principais: | Raposo, M. Manuela M. |
| Outros Autores: | Ferreira, Ana M. P. F.; Belsley, M.; Moura, João C. V. P. |
| Assunto: | Synthesis Azo coupling 5-alkoxy-2,2´-bithiophene couplers Heterocyclic azo dyes Solvatochromic probes UV-visible spectroscopy Thermal stability Nonlinear optics (NLO) applications Donor-acceptor conjugated systems First hyperpolarizability nonlinear optics (NLO) |
| Ano: | 2008 |
| País: | Portugal |
| Tipo de documento: | artigo |
| Tipo de acesso: | acesso aberto |
| Instituição associada: | Universidade do Minho |
| Idioma: | inglês |
| Origem: | RepositóriUM - Universidade do Minho |
| Resumo: | A series of bithienyl azo dyes has been prepared from their corresponding coupling components, 5-alkoxy-2,2´-bithiophenes. The solvatochromic behavior of the compounds was investigated. The hyperpolarizabilities β of derivatives 3-5 were measured using hyper-Rayleigh scattering and thermogravimetric analysis (TGA) was used to evaluate their thermal stability. The experimental results indicate that, good nonlinearity-thermal stability is well balanced for azo-bithiophene NLO-chromophores 3-5 making them good candidates for NLO applications. |
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