Fluorescence modulation of naphthalene containing salicyl hydrazide‐based receptor through aggregation‐induced emission enhancement approach: Dual detection of lanthanum and cyanide ions in semi‐aqueous medium

Abstract

The sensing activity of naphthalene containing salicyl hydrazide-based fluorescence receptor has been improved through aggregation-induced enhanced emission mechanism approach in semi-aqueous medium. The receptor has been found to be selective toward La 3+ with approximately 70-fold fluorescence enhancement due to a combined effect of keto-enol tautomerism inhibition and chelation enhanced fluorescence with a detection limit of 3.91 × 10 −6 M. In addition, the receptor is also able to sense CN − with a detection limit of 3.55 × 10 −6 M via deprotonation effect, justifying its multiple analyte sensing behaviour. Hence, the current analytical methodology improves the sensing activity of the probe and also provides a greener alternative for La 3+ and CNdetection.