“On-Off-On” fluorescence sensor based on g-C 3 N 4 nanosheets for selective and sequential detection of Ag + and S 2-

Wang, Shan; Lu, Qian; Xu, Yi–Jun; Yang, Mingming; Ye, Ranfeng; Du, Dan; Lin, Yuehe

doi:10.1016/j.talanta.2017.03.004

Cited by 41 publications

(25 citation statements)

References 33 publications

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“…Such a value is much lower than some nanocomposite (138 nM), 26 gold nanoparticles (80 nM), 27 DNA@copper nanoparticles (80 nM), 28 and nano Ag-carbon (27 nM), 29 and comparable to g-C 3 N 4 nanosheets (3.5 nM) (Table S4 †). 25 All the results indicate that the detection process was not disturbed by the variation of the pH values.…”

Section: Resultsmentioning

confidence: 81%

“…The detecting limit (LOD) of Ag + was 3.8 nM calculated from 3s/slope (s ¼ standard deviation for 10 blank samples), which is much lower than the reported materials, such as tetraphenyl ethylene (874 nM), 21 carbon dots (320 nM), 22 imidazole derivatives (101 nM), 23 and comparable to gold nanoparticle (7.3 nM) 24 and g-C 3 N 4 nanosheets (4.2 nM) (Table S3 †). 25 Our third experiment concerns the sensing of S 2À using the above formed 1 + ds-DNA@Ag + system at three different pH conditions (6.5, 7.0, 7.4). As shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Experimental and computational investigation of a DNA-shielded 3D metal–organic framework for the prompt dual sensing of Ag⁺ and S²⁻

Cai

Yang

et al. 2019

RSC Adv.

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Section: Resultsmentioning

confidence: 81%

Section: Resultsmentioning

confidence: 99%

Experimental and computational investigation of a DNA-shielded 3D metal–organic framework for the prompt dual sensing of Ag⁺ and S²⁻

Cai

Yang

et al. 2019

RSC Adv.

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“…In a typical procedure, g-C 3 N 4 (125 mg, which was synthesized according to our previous report [ 19 ]) was dispersed in 250 mL of water (1:1) and ultrasonicated for 5 h at ambient temperature. Then, CdSe QDs (1.838 g, 0.0216 mol) were dissolved in the solution by sonication for 2 h. Given that the amine group on the g-C 3 N 4 nanosheets and CdSe QDs had a carboxyl group, g-C 3 N 4 nanosheets and CdSe QDs nanoparticles would be combined by electrostatic interaction.…”

Section: Methodsmentioning

confidence: 99%

Highly Selective and Sensitive Detection of Hg2+ Based on Förster Resonance Energy Transfer between CdSe Quantum Dots and g-C3N4 Nanosheets

Wang

Liu

2018

Nanoscale Res Lett

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In the presence of Hg2+, a fluorescence resonance energy transfer (FRET) system was constructed between CdSe quantum dots (QDs) (donor) and g-C3N4 (receptors). Nanocomposites of g-C3N4 supported by CdSe QDs (CdSe QDs/g-C3N4 nanosheets) were fabricated through an electrostatic interaction route in an aqueous solution. The nanocomposites were characterized by X-ray photoelectron spectroscopy, X-ray diffraction, Fourier-transform infrared spectroscopy, and transmission electron microscopy. Results showed that the g-C3N4 nanosheets were decorated randomly by CdSe QDs, with average diameter of approximately 7 nm. The feasibility of the FRET system as a sensor was demonstrated by Hg (II) detection in water. At pH 7, a linear relationship was observed between the fluorescence intensity and the concentration of Hg (II) (0–32 nmol/L), with a detection limit of 5.3 nmol/L. The new detection method was proven to be sensitive for detecting Hg2+ in water solutions. Moreover, the method showed high selectivity for Hg2+ over several metal ions, including Na+, Mg2+, Ca2+, Pb2+, Cr3+, Cd2+, Zn2+, and Cu2+. The CdSe QDs/g-C3N4 nanosheet conjugate exhibited desirable long-term stability and reversibility as a novel FRET sensor. The novel FRET-based fluorescence detection provided an attractive assay platform for quantifying Hg2+ in complex water solutions.

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“…This can be attributed to restrictions imposed on the free rotational motions which are competitive with luminescent emission. [35] Based on micellar enhancement of the native fluorescence intensity of studied drugs by using SDS, a simple and highly sensitive spectrofluorimetric method has been developed for determination of isoxsuprine, ritodrine and etilefrine in pure form and their pharmaceutical formulations.…”

Section: Procedures For Content Uniformity Testingmentioning

confidence: 99%

Spectrofluorimetric determination of certain adrenergic agonist drugs in their pure forms and pharmaceutical formulations: Content uniformity test application

El‐Din

Attia

2016

Luminescence

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A new, simple, sensitive and rapid spectrofluorimetric method has been developed for determination of certain adrenergic agonists such as isoxsuprine hydrochloride, ritodrine hydrochloride and etilefrine hydrochloride in their pure forms and pharmaceutical dosage forms. The method depends on micellar enhancement of the native fluorescence of investigated drugs by using 2% w/v sodium dodecyl sulfate (SDS) as an anionic surfactant. The enhanced fluorescence intensity of investigated drugs was measured at 305 nm after excitation at 278 nm. The interaction of studied drugs with SDS was studied, and the enhanced fluorescence intensity was exploited to develop an assay method for the determination of investigated drugs. The relative fluorescence intensity-concentration plots were rectilinear over the range 0.15-3.00 μg ml , with low quantification limits of 0.132, 0.123 and 0.118 μg mL for isoxsuprine, ritodrine and etilefrine, respectively. The proposed method was successfully applied for determination of studied drugs in their pharmaceutical formulations. Moreover, the high sensitivity of the proposed method allows performing the content uniformity testing of the studied drugs in their tablets by using the official United States Pharmacopeia (USP) guidelines. Statistical comparisons of the results with those of the reported methods revealed excellent agreement and indicated no significant difference in accuracy and precision.

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“On-Off-On” fluorescence sensor based on g-C 3 N 4 nanosheets for selective and sequential detection of Ag + and S 2-

Cited by 41 publications

References 33 publications

Experimental and computational investigation of a DNA-shielded 3D metal–organic framework for the prompt dual sensing of Ag⁺ and S²⁻

Experimental and computational investigation of a DNA-shielded 3D metal–organic framework for the prompt dual sensing of Ag⁺ and S²⁻

Highly Selective and Sensitive Detection of Hg2+ Based on Förster Resonance Energy Transfer between CdSe Quantum Dots and g-C3N4 Nanosheets

Spectrofluorimetric determination of certain adrenergic agonist drugs in their pure forms and pharmaceutical formulations: Content uniformity test application

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“On-Off-On” fluorescence sensor based on g-C 3 N 4 nanosheets for selective and sequential detection of Ag + and S 2-

Cited by 41 publications

References 33 publications

Experimental and computational investigation of a DNA-shielded 3D metal–organic framework for the prompt dual sensing of Ag+ and S2−

Experimental and computational investigation of a DNA-shielded 3D metal–organic framework for the prompt dual sensing of Ag+ and S2−

Highly Selective and Sensitive Detection of Hg2+ Based on Förster Resonance Energy Transfer between CdSe Quantum Dots and g-C3N4 Nanosheets

Spectrofluorimetric determination of certain adrenergic agonist drugs in their pure forms and pharmaceutical formulations: Content uniformity test application

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Experimental and computational investigation of a DNA-shielded 3D metal–organic framework for the prompt dual sensing of Ag⁺ and S²⁻

Experimental and computational investigation of a DNA-shielded 3D metal–organic framework for the prompt dual sensing of Ag⁺ and S²⁻