Highly Selective and Ultrasensitive Turn-on Luminescence Chemosensor for Mercury (II) Determination Based on the Rhodamine 6G Derivative FC1 and Au Nanoparticles

BRASCA R; ONAINDIA C; GOICOECHEA H C; MUÑOZ DE LA PEÑA, A; MJ CULZONI,

SENSORS

MOLECULAR DIVERSITY PRESERVATION INTERNATIONAL-MDPI

Lugar: Basel; Año: 2016 vol. 16 p. 1652 - 1663

1424-8220

A method for the detection and quantitation of Hg2+ in aqueous samples by fluorescencespectroscopy is presented. It consists of a turn-on sensor developed by coupling Gold nanoparticles(AuNPs) with the rhodamine 6G derivative FC1, in which the response is generated by amercury-induced ring-opening reaction. The AuNPs were included in order to improve thesensitivity of the method towards the analyte, maintaining its high selectivity. The method wasvalidated in terms of linearity, precision and accuracy, and applied to the quantitation of Hg2+ inMilli-Q and tap water with and without spiked analyte. The limit of detection and quantitation were0.15 μg·L−1 and 0.43 μg·L−1, respectively, constituting a substantial improvement of sensitivity incomparison with the previously reported detection of Hg2+ with free FC1.