Serine-Based Bis-quat Gemini Surfactants: Synthesis and Micellization Properties

• Tipo: Artigo em Revista Científica Internacional
• Data: 2012

Autores

Goreti G Silva (Autor) Outra; Ricardo F Fernandes (Autor) Outra; Eduardo F Marques (Autor) FCUP; LuIsa L C do Vale (Autor) FCUP

Revista

Título: European Journal of Organic Chemistry

Vol. 2012

Páginas: 345-352

ISSN: 1434-193X

Editora: Wiley-Blackwell

Indexação

ISI Web of Knowledge - 32 Citações

Scopus - 26 Citações

Classificação Científica

FOS: Ciências exactas e naturais > Química

Outras Informações

ID Authenticus: P-002-H52

DOI: 10.1002/ejoc.201101118

Abstract (EN): The synthesis of novel cationic gemini surfactants based on serine, with long lipophilic alkyl chains and a spacer linked to the nitrogen atom of the amino acid residue by amine linkages, is described. The most efficient synthetic pathway involves introduction of the spacer into the monomeric precursors, N-alkyl derivatives, by reductive amination of dialdehydes followed by methylation and deprotection. Characterization of the basic micellization properties of the new compounds was carried out by tensiometry and conductimetry. These surfactants present enhanced interfacial properties compared to the monomeric analogues, and show improved performance, namely lower critical micelle concentration (cmc), lower surface tension at cmc and increased micellar ionization, with respect to conventional bis-quaternary ammonium salts (bis-quats).

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 8