Synthesis, electrochemical and spectroscopic properties of molybdenum complexes bearing 5-alkoxy-thiophenic or- bithiophenic groups

• Autor(a) principal: Fonseca, A. Maurício C.
• Data de Publicação: 2005
• Outros Autores: Raposo, M. Manuela M., Sousa, Ana M. R. C., Kirsch, G., Beley, Marc
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
• Texto Completo: http://hdl.handle.net/1822/7840
• topic: 2-formyl-5-alkoxylthiophenes; 5-formyl-5’-alkoxy-2,2’-bithiophenes; Sulfur heterocycles; Molybdenum complexes; Hydrazido(-2); Conjugated systems; UV-Visible spectroscopy; Solvatochromism; Electrochemistry; Redox properties; Nonlinear optical (NLO) materials; molybdenum; N ligands; Science & Technology

Trans-[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 properties of these compounds were studied. These results suggest that efficient π conjugated systems were obtained due to the low energy charge transfer between the metal and the heterocyclic moieties.