Synthesis and evaluation of new thienyl and bithienyl-bis-indolylmethanes as co...

• Author(s): Batista, Rosa M. F. ; Oliveira, M. Elisabete ; Nuñez, Cristina ; Costa, Susana P. G. ; Lodeiro, Carlos ; Raposo, M. Manuela M.
• Date: 2009
• Persistent ID: http://hdl.handle.net/1822/10644
• Origin: RepositóriUM - Universidade do Minho
• Subject(s): Synthesis; (Bi)thiophene; Bis-Indolylmethanes; Anion chemosensors; Heterocycles
• Document Type: Article
• Language: English

Description

The synthesis and full characterization of new bis-indolylmethanes containing thienyl and bithienyl moieties are reported. The sensor ability of the compounds in the presence of halide ions (F-, Cl-, Br- and I-), NO3-, ClO4-, SO42-, CN- and OH- ions was investigated in acetonitrile. The experimental results indicate that they could act as selective chromogenic-sensing molecules for the most basic anions F-, CN- and OH-, as a well-defined color change from yellow to pink was observed. The interaction constants between compounds 1 and 2 in the presence of F-, CN- and OH- were calculated and increased in the order OH- > F- > CN-.