A Highly Selective Sensor for Cyanide in Organic Media and on Solid Surfaces
AbstractThe application of IR 786 perchlorate (IR-786) as a selective optical sensor for cyanide anion in both organic solution (acetonitrile (MeCN), 100%) and solvent-free solid surfaces was demonstrated. In MeCN, IR-786 was selective to two anions in the following order: CN− > OH−. A significant change in the characteristic dark green color of IR-786 in MeCN to yellow was observed as a result of nucleophilic addition of CN− to the fluorophore, i.e., formation of IR 786-(CN), which was also verified by a blue shift in the 775 nm absorbance peak to 430 nm. A distinct green fluorescence emission from the IR-786-(CN) in MeCN was also observed, which demonstrated the selectivity of IR-786 towards CN− in MeCN. Fluorescence emission studies of IR-786 showed that the lower detection limit and the sensitivity of IR-786 for CN− in MeCN was 0.5 μM and 0.5 to 8 μM, respectively. The potential use of IR-786 as a solvent-free solid state sensor for the selective sensing and monitoring of CN− in the environment was also demonstrated. On solvent-free solid state surfaces, the sensitivity of the IR-786 to CN− in water samples was in the range of 50–300 μM with minimal interference by OH−. View Full-Text
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Barare, B.; Babahan, I.; Hijji, Y.M.; Bonyi, E.; Tadesse, S.; Aslan, K. A Highly Selective Sensor for Cyanide in Organic Media and on Solid Surfaces. Sensors 2016, 16, 271.
Barare B, Babahan I, Hijji YM, Bonyi E, Tadesse S, Aslan K. A Highly Selective Sensor for Cyanide in Organic Media and on Solid Surfaces. Sensors. 2016; 16(3):271.Chicago/Turabian Style
Barare, Belygona; Babahan, Ilknur; Hijji, Yousef M.; Bonyi, Enock; Tadesse, Solomon; Aslan, Kadir. 2016. "A Highly Selective Sensor for Cyanide in Organic Media and on Solid Surfaces." Sensors 16, no. 3: 271.
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