Synthesis of formyl-thienylpyrroles: versatile building blocks for NLO materials
摘要:
Several formyl-substituted 1-alkyl(aryl)-2-(2'-thienyl)pyrroles 3-7 were synthesized by functionalization of the pyrrole or thiophene ring of thienylpyrroles 2 using different methods: Vilsnicier formylation or metalation followed by reaction with DMF. (c) 2006 Elsevier Ltd. All rights reserved.
Synthesis and characterization of new thienylpyrrolyl-benzothiazoles as efficient and thermally stable nonlinear optical chromophores
作者:Rosa M.F. Batista、Susana P.G. Costa、Elisabeth L. Malheiro、Michael Belsley、M. Manuela M. Raposo
DOI:10.1016/j.tet.2007.03.065
日期:2007.5
The synthesis and full characterization of new chromophores with second-order nonlinearities containing thienylpyrrolyl and benzothiazolyl moieties are reported. The solvatochromic behavior of the compounds was investigated. The hyperpolarizabilities beta of derivatives 4-6 were measured using hyper-Rayleigh scattering and thermogravimetric analysis (TGA) was used to evaluate their thermal stability. The experimental results indicate that strong nonlinearity is balanced by good thermal stability especially for chromophores 6b and 6c, making them good candidates for NLO applications. (C) 2007 Elsevier Ltd. All rights reserved.
Synthesis and Characterization of Dicyanovinyl-Substituted Thienylpyrroles as New Nonlinear Optical Chromophores
作者:M. Manuela M. Raposo、Ana M. R. C. Sousa、G. Kirsch、P. Cardoso、M. Belsley、E. de Matos Gomes、A. Maurício C. Fonseca
DOI:10.1021/ol061277s
日期:2006.8.1
New dicyanovinyl-substituted 1-(alkyl)aryl-2-(2'-thienyl) pyrroles 2 were synthesized and characterized. The solvatochromic behavior of the synthesized compounds was investigated. All the derivatives showed reversible oxidation and reduction on the CV time scale. The hyperpolarizabilities (beta) of compounds 2 were measured using hyper-Rayleigh scattering. The results are among the highest beta values reported for donor-acceptor-substituted thienylpyrroles.
Synthesis of formyl-thienylpyrroles: versatile building blocks for NLO materials
作者:M. Manuela M. Raposo、Ana M.R.C. Sousa、A. Maurício C. Fonseca、G. Kirsch
DOI:10.1016/j.tet.2006.02.004
日期:2006.4
Several formyl-substituted 1-alkyl(aryl)-2-(2'-thienyl)pyrroles 3-7 were synthesized by functionalization of the pyrrole or thiophene ring of thienylpyrroles 2 using different methods: Vilsnicier formylation or metalation followed by reaction with DMF. (c) 2006 Elsevier Ltd. All rights reserved.
Synthesis and second-order nonlinear optical properties of new chromophores containing benzimidazole, thiophene, and pyrrole heterocycles
作者:Rosa M.F. Batista、Susana P.G. Costa、M. Belsley、M. Manuela M. Raposo
DOI:10.1016/j.tet.2007.06.098
日期:2007.9
A new series of thermally stable benzimidazole-based nonlinearoptical (NLO) chromophores 4 and 5 have been developed. These chromophores possess a thienylpyrrolyl π-conjugated system attached to functionalized benzimidazole heterocycles. This feature leads to robust chromophores with excellent solvatochromic properties, high thermal stabilities and good molecular opticalnonlinearities.