A cost-effective and practical polybenzanthrone-based fluorescent sensor for efficient determination of palladium (II) ion and its application in agricultural crops and environment.

Highlights: [•] PBA was facilely electrosynthesized in the binary solvent system containing of acetonitrile and boron trifluoride diethyl etherate. [•] “On–off” type fluorescent sensor based on this polymer for highly selective, sensitive, and practical detection of Pd2+ was designed. [•] The possible mechanism between Pd2+ and PBA has been discussed and TEM preliminary proved the proposed mechanism. [•] This fluorescent CP-based sensor has been used to practically detect Pd2+ in agricultural crops and environment samples with satisfactory results. [ABSTRACT FROM AUTHOR]