A rhodamine-based dual chemosensor for the visual detection of copper and the ratiometric fluorescent detection of vanadium

Mesoporous aluminosilica sensors for the visual removal and detection of Pd(II) and Cu(II) ions

“…To utilize the aluminosilica sensor for the extraction of 2 ppm Pd(II) from a mixture of elements including (1) 4.0 ppm K + , (2) 4.5 ppm Li + , (3) 5.0 ppm Ca 2+ , (4) 4.5 ppm Mg 2+ , (5) 4.0 ppm Cr 6+ , (6) 4.0 ppm Al 3+ , (7) 5.0 ppm Cu 2+ , (8) 4.5 ppm Ni 2+ , (9) 4.5 ppm Mn 2+ , (10) 4.5 ppm Zn 2+ , (11) 4.0 ppm Co 2+ , (12) 4.0 ppm Cd 2+ , (13) 4.0 ppm Pb 2+ , (14) 4.0 ppm Hg 2+ , (15) 3.5 ppm Fe 3+ , (16) 4.0 ppm Bi 3+ , (17) 3.5 ppm Sb 3+ , (18) 4.0 ppm Mo 6+ , and (19) 4.0 ppm Se 4+ , we carried out removal assays in an overall volume of 1000 mL, pH 3.5, and in the presence of a masking agent of a 0.3 M mixture of sodium citrate/thiosulfate/tartrate. About 40 mg of the solid sensor was added to the mixture, which was stirred for 3 h. To quantitatively determine the efficiency of Pd(II) ion extraction, the optical solid sensors and filtrate solution were analyzed by UV/vis-NIR and ICP-OES.…”

“…The potential of such methods is limited by high investment costs, complexity, and difficulty in situ application. In an attempt to resolve these issues, optical chemosensors have been developed for detecting Cu ions, an example being the modified fluorophore surface sensor, which can emit fluorescence that can be used for detecting and analyzing Cu(II) ions [15,16]. The detection of Cu(II) and Pd(II) ions using electrochemical sensors based on attenuated internal reflectance stripping voltammetry has been reported [17].…”

A new rhodamine-based colorimetric chemosensor for naked-eye detection of Cu 2+ in aqueous solution

“…19,20 Specifically, it is based on spirolactam (colorless and nonfluorescent) to ring-opened amide (color and fluorescent) process utilized for the detection of metal ions. [21][22][23][24][25][26][27][28][29][30][31] Based on this mechanism, our ambition was to design and synthesize a new colormetric probe for detection of Cu 2+ in aqueous media. Herein, we introduce a novel and simple method to prepare rhodamine B-based chemosensor by two steps reaction.…”

Fluorescent probe for copper(II) ion based on a rhodamine spirolactame derivative, and its application to fluorescent imaging in living cells

“…Even though considerable efforts have been undertaken to develop fluorescent probes for Cu 2+ , many reported fluorescent probes generally undergo fluorescence quenching upon binding with its inherent paramagnetic nature [4][5][6][7][8][9][10], which is not as sensitive as a fluorescence enhancement response. Recently there are still a few examples reported wherein enhancement in the fluorescence intensity has been observed upon complexation with Cu 2+ ions [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25]. In addition, the fluorescence enhancement in most cases is small and usually suffers from a high background.…”