A Selective Colorimetric and Fluorescence Chemosensing Sensor for Cr3+ Based on a Rhodamine Base Derivative Publisher



Hosseini M^{1, 3} ; Khoobi M^{2, 3} ; Tarasi R^{2, 3} ; Ganjali MR^{4, 5}
Source: Research on Chemical Intermediates Published:2018

Abstract

A rhodamine-conjugated coumarin (L) was used in designing a selective fluorescence chemosensor for the determination of trace amounts of Cr3+ ions in acetonitrile–water (MeCN/H2O (90:10, %v/v) solutions. The intensity of the fluoresce emission of the chemosensor is intensified upon addition of Cr3+ ions in MeCN/H2O (90:10, %v/v) solutions, due to the formation of a selective 1:1 complex between L and Cr3+ ions. The fluorescence enhancement versus Cr3+ concentration has been found to be linear from 1.0 × 10−7 to 1.8 × 10−5 M and a detection limit of 7.5 × 10−8 M. The proposed fluorescent probe proved to be highly selective towards Cr3+ ions as compared to other common metal ions and could be successfully applied to the determination of Cr3+ concentrations in some water and wastewater samples. © 2018, Springer Science+Business Media B.V., part of Springer Nature.