A dual chemosensor for Cu²⁺ and Hg²⁺ based on a rhodamine-terminated water-soluble polymer in 100% aqueous solution

Abstract

A dual chemosensor based on rhodamine-terminated PEG was developed for the simultaneous selective detection of Cu2+ and Hg2+ in water.

Biogenic Quantum Dots for Sensitive, Label-Free Detection of Mercury Ions

“…The fluorescence was severely quenched by Hg 2+ , and showed nonmeasurable quenching by other cations at identical concentrations except for Cu 2+ and Pb 2+ . For measurement of real water samples, the interference of these species may be eliminated by strategies such as adding citrate , or ethylenediaminetetraacetate , for masking Cu 2+ and adding G-rich DNA for masking Pb 2+ . , Further improvement in the selectivity of Bio-QD probe will be needed in future studies. Furthermore, the Bio-QD-based fluorometry was reperformed with different cuvette and at different temperature from the previous one, but nearly the same fluorescence intensity–Hg 2+ concentration regression curve was obtained (Figure S4), indicating a good reproducibility and robustness of this method.…”

Facile Synthesis of Water-Soluble Rhodamine-Based Polymeric Chemosensors via Schiff Base Reaction for Fe3+ Detection and Living Cell Imaging

“…By virtue of the antifouling properties of PEG toward proteins, it is expected that the detection performance of PEG-derived polymeric sensors would be improved and the background interference from biological contamination should be reduced ( Liu et al, 2015 ). A few water-soluble polymeric sensors obtained by combining PEG segment and rhodamine moiety have been designed for the detection of Cu 2+ , Hg 2+ , and Al 3+ ( Li et al, 2016 ; Geng et al, 2017 ; Li et al, 2018 ). However, the rhodamine-PEG-conjugated polymeric sensors, which can be applied in detecting Fe 3+ in pure aqueous solutions with high biocompatibility, have not been reported.…”

A solvent-dependent chemosensor for fluorimetric detection of Hg2+ and colorimetric detection of Cu2+ based on a new diarylethene with a rhodamine B unit

“…25 Rhodamine and its derivatives have gained tremendous interest in the eld of biosensors because of their advantages such as broad emission wavelength, high uorescence quantum yield, and large extinction coefficient. [26][27][28] Generally speaking, rhodamine derivatives with spirolactam structure are non-uorescent and colorless. Interestingly, upon binding with protons or metal ions they become strongly uorescent and produce intense color because of ring-opened structure.…”