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Synthesis of formyl-thienylpyrroles : versatile building blocks for NLO materials
Raposo, M. Manuela M.; Sousa, Ana M. R. C.; Fonseca, A. Maurício C.; Kirsch, G.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: Vilsmeier formylation or metalation followed by reaction with DMF.
Push-pull tricyanovinyl-substituted thienylpyrroles : synthesis, solvatochromic...
Raposo, M. Manuela M.; Sousa, Ana M. R. C.; Fonseca, A. Maurício C.; Kirsch, G.New tricyanovinyl- derivatives 1 of 1-(alkyl)aryl-2-(2'-thienyl)pyrroles 2 have been synthesized and characterized. Compounds 1 display dramatic reductions in both their optical and electrochemical band gaps in comparison to thienylpyrroles 2. The solvatochomic behavior of tricyanovinyl- derivatives 1 was investigated in a variety of solvents. In agreement with the solvatochromic and the electrochemical studies...
Donor-acceptor substituted thienylpyrrole azo dyes : synthesis, solvatochromic ...
Raposo, M. Manuela M.; Sousa, Ana M. R. C.; Fonseca, A. Maurício C.; Kirsch, G.The synthesis of thienyl- substituted pyrrole azo dyes and their UV-visible, solvatochromic and electrochemical properties are described. In agreement with the solvatochromic data and also with the electrochemical study the new donor-acceptor systems synthesized could have applications in NLO.
New fluorescent heterocyclic materials : synthesis, solvatochrornic and fluores...
Costa, Susana P. G.; Batista, Rosa M. F.; Sousa, Ana M. R. C.; Raposo, M. Manuela M.Thienyl- and bithienyl-1,3-benzothiazoles 1 and 2 were synthesised by reacting various formyl thienyl and bithienyl derivatives with o-aminobenzenethiol in moderate to excellent yields. Evaluation of the solvatochromic and fluorescence properties of these compounds was carried out. Due to their strong fluorescence and also the strong push-pull character, benzothiazole derivatives 1 and 2 can be used as potentia...
Synthesis, electrochemical and spectroscopic properties of molybdenum complexe...
Fonseca, A. Maurício C.; Raposo, M. Manuela M.; Sousa, Ana M. R. C.; Kirsch, G.; Beley, MarcTrans-[FMo{NN=CH(5´-R-thienyl)}(dppe)2][BF4] (R = OMe and OEt) and trans[FMo{NN=CH(5’-R-2,2’-bithienyl)}(dppe)2][BF4] (R = OMe, OEt and O(iPr)) were synthesised in good yields by reacting 2-formyl-5-alkoxylthiophenes and 5-formyl-5’-alkoxy-2,2-’bithiophenes respectively, with hydrazido(2-) complex, trans-[MoF(NNH2)(dppe)2][BF4]. The electrochemical, spectroscopic and solvatochromic prope...
Thienylpyrrole azo dyes: synthesis, solvatochromic and electrochemical properties
Raposo, M. Manuela M.; Sousa, Ana M. R. C.; Fonseca, A. Maurício C.; Kirsch, G.The synthesis and the evaluation of solvatochromic and electrochemical properties of new donor-acceptor-substituted thienylpyrrole azo dyes 3 are described. These derivatives exhibit dramatic changes in both their electronic and redox properties in comparison with thienylpyrroles 1. In agreement with the solvatochromic and electrochemical studies of push-pull derivatives 3 the new compounds prepared, may find a...
Synthesis of tricyanovinyl-substituted thienylpyrroles and characterization of ...
Raposo, M. Manuela M.; Sousa, Ana M. R. C.; Kirsch, G.; Ferreira, F.; Belsley, M.; Gomes, E. Matos; Fonseca, A. Maurício C.Tricyanovinyl-substituted 1-(alkyl)aryl-2-(2´-thienyl)pyrroles 1 have been synthesized by direct tricyanovinylation reaction of 1-(alkyl)aryl-2-(2´-thienyl)pyrroles 2 using TCNE. The tricyanovinyl- derivatives 1 display dramatic reductions in both their optical and electrochemical band gaps relative to thienylpyrrole precursors 2. The solvatochromic behavior of compounds 1 was investigated in a variety of sol...
Synthesis and UV-visible properties of thienyl- substituted pyrrole azo dyes
Raposo, M. Manuela M.; Sousa, Ana M. R. C.; Fonseca, A. Maurício C.; Kirsch, G.The synthesis of thienyl- substituted pyrrole azo dyes and their UV-visible properties are described.
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