In recent years, numerous efforts have been devoted for the development of chemosensors for selective detection of various anions. Among them, Cyanide is one of the most concerning anions in the environment.Accordingly, the World Health Organization (WHO) has set the maximum contaminant level (MCL) for cyanide at 2.7x10-6 M in drinking water. Therefore many methods for cyanide detection have been reported. One of the common approaches involves the complexation of free cyanide with boronic acid derivatives to generate the sensory signals.We used hyperbranched conjugated polymer (HCP) containing a number of boronic acid groups for cyanide anion sensing at the branch terminal. HCP fluorescence intensity is completely reduced by the addition of benzyl viologen, which is well known for a powerful quencher. The quenched fluorescence of HCP revived by adding cyanide anion due to the interruption of electrostatic interaction between negatively-charged HCP and positively-charged benzyl viologen quencher.

fluorometric hyperbranched conjugated polymer chemosensor for highly selective cyanide detection

241st National Meeting (2011)

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