A multicenter lanthanide coordination polymer for ratiometric pesticide monitoring.

Due to the increasing environmental and public health issues, efficient recognition and detection approaches for pesticides has attracted concerns worldwide. Herein, luminescent lanthanide coordination polymers (Ln-CPs) with tunable emissive centers are synthesized by simultaneously doping controlled amounts of Eu3+, Tb3+ and Gd3+ into the same framework. An optimized version of the multicenter Ln-CP (Eu 0.048 Tb 0.052 Gd 0.9 -CPBA) is prepared for 2D fingerprint recognizing pesticides. Additionally, the special "turn-on" response of ligand-based emission and "turn-off" response of Eu3+/Tb3+-based emission toward glyphosate (GPS) endow Eu 0.048 Tb 0.052 Gd 0.9 -CPBA with highly selective ratiometric sensing capability. The rapid, sensitive, selective and recyclable sensor for GPS provides a facile and adjustable synthetic approach for the development of multicenter ratiometric sensors. The real-time monitoring platform not only improves the sensitivity and selectivity but also holds great environmental significance. [Display omitted] • A water stable ratiometric senor was synthesized through lanthanide ion doping. • Different pesticides in aqueous solution could be effectively recognized. • The sensor is sensitive and selective for glyphosate (GPS) with high recyclablity and low detection limit. • The sensing strategy highlights a new direction method for achieving more facile and efficient sensors. [ABSTRACT FROM AUTHOR]