Side chains of cobalt corrinoids control the sensitivity and selectivity in the colorimetric detection of cyanide.
Substitution of Co(III)-bound water by cyanide allows the rapid colorimetric detection of micromolar amounts of cyanide with cobalt corrinoids. Negatively charged side chains at the periphery of these metal-based sensors increase the selectivity of cyanide versus thiocyanate, the most disturbing anion, by a factor of 30 through additional supramolecular interactions in water.
Männel-Croisé
Christine
C
Institute of Inorganic Chemistry, University of Zürich, Winterthurerstrasse 190, 8057 Zürich, Switzerland.
Zelder
Felix
F
D003035:Cobalt / Q000737:chemistry*; D003124:Colorimetry / Q000379:methods* / Q000592:standards; D045728:Corrinoids / Q000737:chemistry*; D003486:Cyanides / Q000032:analysis*; D012680:Sensitivity and Specificity; D012996:Solutions; D014867:Water; D014874:Water Pollutants, Chemical / Q000032:analysis
D045728:Corrinoids; D003486:Cyanides; D012996:Solutions; D014874:Water Pollutants, Chemical; D014867:Water; D003035:Cobalt