Room-temperature phosphorescence probe based on Mn-doped ZnS quantum dots for the sensitive and selective detection of selenite

Abstract

The room-temperature phosphorescence (RTP) of Mn-doped ZnS quantum dots (Mn-ZnS QDs) was quenched by the addition of selenite in the presence of glutathione. The quenching of the RTP emission of Mn-ZnS QDs was due to HSe À ions which was the reaction product of selenite and glutathione.Based on the above finding, a simple, rapid, sensitive probe for selective detection of selenite was successfully fabricated. Under the optimal experimental conditions, a linear relationship was obtained covering the linear range of 0.1-5.0 mmol L À1 and the detection limit (3s) was 0.085 mmol L À1 . The proposed method was successfully applied for the determination of selenite in sodium selenite tablets and sodium selenite and vitamin E injection with satisfactory results.

Lipoic Acid Functionalized Silver Nanoprisms for Colorimetric Sensing of γ‐Aminobutyric Acid, Selenite and Myoglobin

“…Moreover, calibration graphs were also plotted against absorbance ratios (A/A o ) versus concentrations of each analyte (Figure S10d–f of Supporting Information), indicating the calibration graphs constructed against the Δλ values and concentrations of each analyte exhibited superior analytical figures as compared to calibration graphs plotted against absorption ratios. Table 1 displays a comparison of LA‐AgNPRs‐based colorimetric method with the reported methods for sensing of GABA, selenite, and myoglobin [35–37,39–41,43–45,61–68] . It can be noticed that LA‐AgNPRs acted as promising colorimetric sensor for simultaneous detection of three analytes and the LODs of the method either comparable or superior to the reported methods, signifying the potentiality of the method for three analytes assay.…”

“…Table 1 displays a comparison of LA-AgNPRs-based colorimetric method with the reported methods for sensing of GABA, selenite, and myoglobin. [35][36][37][39][40][41][43][44][45][61][62][63][64][65][66][67][68] It can be noticed that LA-AgNPRs acted as promising colorimetric sensor for simultaneous detection of three analytes and the LODs of the method either comparable or superior to the reported methods, signifying the potentiality of the method for three analytes assay.…”

Ultrasensitive and selective fluorescence recognition of selenite byo-phenylenediamine functionalized carbon quantum dots

“…[36][37][38][39][40][41] Although fluorescence detection by CQDs has achieved progress, few examples of CQDs have been applied for SeO 3 2À detection, but most utilized microwave-assisted, pyrolysis, multi-step reactions to prepare CQDs, which have a cumbersome preparation process, small yield, and low quantum yield, and none of them have been deeply studied and applied in biological sample detection. [42][43][44] For example, Liao prepared a CQDs with citric acid and 3,3 0 -diaminobenzidine (DAB) using a microwave assisted method, which can detect trace SeO 3 2À in water samples, but the quantum yield is only 8%; 45 Devi synthesized functionalized blue CQDs (GCQDs) via the pyrolysis method for monitoring SeO 3 2À in water with a low quantum yield of 11.4%. Few fluorescence nanomaterial sensors have been utilized to detect SeO 3 2À in the biological field.…”

Fluorescent Probes Containing Selenium as a Guest or Host

“…As a result, the probe in conjunction with GSH senses Se(IV) with a detection limit of 30 nM. 48 Chen et al 49 used the same strategy to develop a room-temperature phosphorescent (RTP) Se(IV) probe that utilizes Mn-doped ZnS QDs. Quenching of RTP emission of Mn-ZnS QDs is a consequence of the production of HSe À ions, generated by the reaction of selenite with GSH.…”