Highly selective optical chemosensor for cyanide in aqueous medium

作者：Rodrigues Joao M M; Farinha Andreia A S; Tome Augusto C; Cavaleiro Jose A S; Tome Joao P C

来源：Sensors and Actuators B: Chemical , 2016, 224: 81-87.

DOI：10.1016/j.snb.2015.10.026

• Anions
• Anion binding
• Chemosensor
• Chromogenic
• Cyanide
• Naked-eye
• Phthalocyanines

New cyanide selective chromogenic chemo sensors based on metal-phthalocyanines containing four to sylamino groups were developed. These new receptors have high sensitivity for several anions (AcO-, F-, CN-, NO2-, H2PO4- and OH-) over other anions, such as: Br-, Cl-, NO3- and HSO4-. The experiments were conducted by UV-vis spectroscopy in DMSO and THF solutions. The selectivities were also checked in DMSO:water mixtures. In solutions containing water the highest selectivity was obtained for CN- anion. The host:guest complexes formed during the sensing event can be undo by acid treatment with a solution of trifluoroacetic acid without loss of the sensing ability of the chemosensors allowing their reuse.

• 出版日期2016-3-1