Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/49648
Título: | Terpyridine derivatives functionalized with (hetero)aromatic groups and the corresponding Ru complexes: synthesis and characterization as SHG chromophores |
Autor(es): | Fernandes, Sara Sofia Marques Belsley, M. Ciarrocchi, Carlo Licchelli, Maurizio Raposo, M. Manuela M. |
Palavras-chave: | Synthesis Terpyridine Push-pull heterocyclic systems Ruthenium complexes Second-harmonic generators (SHG) Nonlinear optics (NLO) Heterocycles Ligands UV-visible spectroscopy Electrochemistry Push-pull heterocyclic ligands |
Data: | 2018 |
Editora: | Elsevier 1 |
Revista: | Dyes and Pigments |
Citação: | Fernandes, S. S. M.; Belsley, M.; Ciarrocchi, C.; Licchelli, M.; Raposo, M. M. M. Terpyridine derivatives functionalized with (hetero)aromatic groups and the corresponding Ru complexes: synthesis and characterization as SHG chromophores Dyes Pigments 2018, 150, 49-58 |
Resumo(s): | Push–pull terpyridine derivatives were synthesized and characterized in order to study the variations produced in their optical and electronic properties by linking different (hetero)aromatic electron donor moieties at position 4 of the electron deficient terpyridine moiety. The final donor-acceptor systems were synthesized in fair to good yields by Kröhnke condensation of the precursor aldehydes, with 2-acetylpyridine. Hyper-Rayleigh scattering in dioxane solutions using a fundamental wavelength of 1064 nm was employed to evaluate their second-order nonlinear optical properties. Terpyridine derivative functionalized with the 9-ethyl-9H-carbazolyl group exhibited the largest first hyperpolarizability (beta = 610 × 10-30 esu, using the T convention) thus indicating its potential application as a second harmonic generation (SHG) chromophore. Terpyridine derivatives were also used as ligands for the synthesis of novel [RuII(tpy)(NCS)3]– complexes, prepared in good yields by a two-step procedure involving the preparation of [RuIII(tpy)(Cl3] as precursors. RutheniumII complexes display a broad absorption in the visible range, accounting for their very dark color. Their redox behaviour is mainly characterized by the RuII-RuIII oxidation and by the ligand-centred reduction, whose potentials can be finely tuned by the electronic properties of the aromatic substituents on the terpyridine ligand. Hyper-Rayleigh scattering in methanol solutions using a fundamental wavelength of 1064 nm was also employed to evaluate their second-order nonlinear optical properties. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/49648 |
DOI: | 10.1016/j.dyepig.2017.10.046 |
ISSN: | 0143-7208 |
e-ISSN: | 1873-3743 |
Versão da editora: | https://doi.org/10.1016/j.dyepig.2017.10.046 |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | CDQuim - Artigos (Papers) |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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Dyes and Pigments 150 (2018) 49–58 terpyridines.pdf | Dyes and Pigments 150 (2018) 49–58 | 682,65 kB | Adobe PDF | Ver/Abrir |
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