Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 224, Issue -, Pages 81-87Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2015.10.026
Keywords
Anions; Anion binding; Chemosensor; Chromogenic; Cyanide; Naked-eye; Phthalocyanines
Funding
- FCT/MEC through national funds [FCT UID/QUI/00062/2013]
- European Union (COMPETE) [PTDC/CTM/101538/2008, PTDC/QEQ-QOR/1273/2012]
- European Union (FEDER) [PTDC/CTM/101538/2008, PTDC/QEQ-QOR/1273/2012]
- FEDER
- Portuguese NMR Network
- FCT [SFRH/BD/81014/2011, SFRH/BPD/73060/2010]
- Fundação para a Ciência e a Tecnologia [PTDC/QEQ-QOR/1273/2012, SFRH/BD/81014/2011, SFRH/BPD/73060/2010] Funding Source: FCT
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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. (C) 2015 Elsevier B.V. All rights reserved.
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