Ion recognition: synthesis of 2-methyl-2,4-di (2-thienyl)-2,3-dihydro-1H-1,5-benzodiazepine and its application in construction of a highly selective and sensitive Ag+ membrane sensors
Título del documento: Ion recognition: synthesis of 2-methyl-2,4-di (2-thienyl)-2,3-dihydro-1H-1,5-benzodiazepine and its application in construction of a highly selective and sensitive Ag+ membrane sensors
Revista: Journal of the Brazilian Chemical Society
Base de datos: PERIÓDICA
Número de sistema: 000311935
ISSN: 0103-5053
Autores: 1
Instituciones: 1Tehran University, Department of Chemistry, Teherán. Irán
Año:
Periodo: Dic
Volumen: 17
Número: 7
Paginación: 1217-1222
País: Brasil
Idioma: Inglés
Tipo de documento: Artículo
Enfoque: Experimental, aplicado
Resumen en inglés A highly selective and sensitive plasticized membrane sensor for Ag+ ions based on 2-methyl-2,4-di(2-thienyl)-2,3-dihydro-1H-1,5-benzodiazepine (MTHB) as membrane carrier was prepared. The sensor shows a linear dynamic range of 1.0 × 10-6 -1.0 × 10-1 mol L-1, with a Nernstian slope of (58.5±0.3) mV decade-1, and a detection limit of 5.0 × 10-7 mol L-1 (~54 ppb). It has a fast response time of 10 s and can be used for at least eight weeks without any considerable divergences in its potentials. The proposed sensor revealed very good selectivities with respect to the most of common metal ions. The proposed sensor could be used in a pH range of 4.0-8.0. It was successfully used as an indicator electrode in potentiometric titration of Ag+ with NaCl
Resumen en portugués Uma membrana carregadora plastificada foi preparada a partir de 2-metil-2,4-di(2-tienil)-2,3-diidro-1H-1,5-benzodiazepina (MTHB). Esta membrana é altamente sensível e seletiva a íons Ag+. O sensor mostra um intervalo dinâmico linear de 1,0 × 10-6 1,0 × 10-1 mol L-1, com inclinação Nernstiniana de (58,5±0,3) mV per década, e limite de detecção 5,0 × 10-7 mol L-1 (~54 ppb). Apresenta rápido tempo de resposta, 10s, e pode ser usado por 8 semanas no mínimo, sem alterações consideráveis no seu potencial. O sensor proposto pode ser usado no intervalo de pH entre 4,0 e 8,0 e foi utilizado com sucesso, como eletrodo indicador, na titulação potenciométrica de Ag+ com NaCl
Disciplinas: Química
Palabras clave: Química analítica,
Química farmacéutica,
Plata,
Sensores de membrana,
Potenciometría,
Membranas de PVC
Keyword: Chemistry,
Analytical chemistry,
Medicinal chemistry,
Silver,
Membrane sensors,
Potentiometry,
PVC membranes
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