Rhodamine capped gold nanoparticles for the detection of Cr3+ ion in living cells and water samples

Manjubaashini, N.; Thangadurai, T. Daniel; Bharathi, Ganapathi; Nataraj, D.

doi:10.1016/j.jlumin.2018.05.065

Cited by 20 publications

(5 citation statements)

References 63 publications

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“…8). Upon the addition of the interferents, the absorbance at 520 nm showed a Pyridoxal conjugated AuNPs assay 11.5 × 10 3 7.5 − 1.3 × 10 −5 M Bothra et al 2017 Rhodamine capped AuNPs assay 9.3 × 10 3 - Manjubaashini et al 2018 This colorimetric assay 5.0 × 10 3 20 -25 × 10 3 This work slight change; however, a new absorption band did not appear. Therefore, no obvious effect on our sensor system was observed.…”

Section: Selective Detection Of Cr 3+ Using 4-mba Modified Aunps and mentioning

confidence: 92%

Colorimetric detection of Cr3+ based on gold nanoparticles functionalized with 4-mercaptobenzoic acid

Zhang

Liu

et al. 2020

J Anal Sci Technol

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Herein, we report the construction of a colorimetric probe used to detecting Cr 3+ ions in aqueous solution based on functionalized gold nanoparticles. We investigated 4-mercaptobenzoic acid, 4-nitrobenzenethiol, and a mixture of 4-mercaptobenzoic acid and 4-nitrobenzenethiol as ligands for Cr 3+ ions to functionalize the gold nanoparticles, respectively. The results showed that the three probes were all aggregated in the presence of Cr 3+ ions, which induces a color change from ruby to violet. Moreover, gold nanoparticles modified with 4-mercaptobenzoic acid exhibit a higher response toward Cr 3+ than the two other probes, which can be detected by the naked eye and UV-vis absorption spectroscopy. The detection time was rapid (within 25 min). A linear relationship was obtained from 20 to 25 μM between the ratio of the absorbance observed at 635 nm and 520 nm (A635 nm/A520 nm) with the limit of detection was 5 × 10 −6 M. This method exhibited excellent selectivity for Cr 3+ ions over other tested heavy metal ions, anions, and organic molecules in the absence of another shielding reagent of metal ion. The system was successfully utilized to detect Cr 3+ ions in simulated samples.

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Section: Selective Detection Of Cr 3+ Using 4-mba Modified Aunps and mentioning

confidence: 92%

Colorimetric detection of Cr3+ based on gold nanoparticles functionalized with 4-mercaptobenzoic acid

Zhang

Liu

et al. 2020

J Anal Sci Technol

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“…66,67 The calculated IC 50 value was found to be 2.242 μM for HeLa cells of DAN-GQDs, and this concentration is measured for the time of contact assay (Figure S18c). 68 Based on the cytotoxicity experiment outcome and considering the enthrallingly strong emission of the DAN-GQDs, investigating whether DAN-GQDs could be used as imaging probes for live cell imaging is worthwhile. To prove this hypothesis, we performed in vitro cellular studies using human breast cancer cell lines, HeLa (Figure 8).…”

Section: Resultsmentioning

confidence: 99%

Graphene Nanobuds: A New Second-Generation Phosgene Sensor with Ultralow Detection Limit in Aqueous Solution

Ravi¹,

Thangadurai²,

Nataraj

et al. 2019

ACS Appl. Mater. Interfaces

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Selective and sensitive detection of highly toxic chemicals by a suitable, fast, inexpensive, and trustworthy method is vital due to its serious health threats to humankind and breach of public security caused by unexpected terrorist attacks and industrial accidents. Phosgene or carbonyl dichloride is widely employed in many chemical industries and pharmaceuticals, and in pesticide production, which is extremely toxic by severe (short-term) inhalation exposure. Because of the non-existence of a phosgene sensor in aqueous solution and the immense emphasis gained by nanomaterials, especially carbonaceous materials, augmented attention has been given to the development of a fluorophore-functionalized carbon-based method to detect this noxious substance. In this study, surfactant free 1,8-diaminonaphthalene (DAN)-functionalized graphene quantum dots (DAN-GQDs) were prepared to detect phosgene in aqueous solution. The FESEM (field emission scanning electron microscopy) and HRTEM (high-resolution transmission electron microscopy) analyses confirm the as-prepared DAN-GQD morphology as nanobuds (NBs) with an average diameter of ca. 35–40 nm. The crystalline nature, elemental composition, and chemical state of DAN-GQDs were analyzed by standard physiochemical techniques. The edge-termination at the carboxyl functional group of GQDs with DAN was examined by XPS, Raman, FT-IR, and 1H NMR spectroscopy analyses. The aqueous solution of DAN-GQDs (4.89 × 10–9 M) exhibits a strong emission peak at 423 nm upon excitation at 328 nm. The addition of the phosgene molecule (0 → 88 μL) quenches the initial fluorescence intensity of DAN-GQDs (ΦF 53.6 → 34.6%) through the formation of a stable six-membered cyclized product. The DAN-GQDs displayed excellent selectivity and sensitivity for phosgene (K a = 3.84 × 102 M–1 and LoD (limit of detection) = 2.26 ppb) over other competing toxic pollutants in water. The time-resolved fluorescence analysis confirms that the quenching of DAN-GQDs follows nonradiative relaxation of excited electrons. Furthermore, bioimaging experiments of phosgene in living human breast cancer (HeLa) cells and cell viability test successfully demonstrated the practicability of DAN-GQDs.

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“…This may be due to the introduction of gold nanostructures. Previous studies showed that GNPs-GSH-Rh6G2 permeate well into cells [48,57,58].…”

Section: Gnps-gsh-rh6g2 Bioimaging In Living Cellsmentioning

confidence: 96%

Detection and imaging of Hg(II) in vivo using glutathione-functionalized gold nanoparticles

Li¹,

Li²,

Wang³

et al. 2022

Beilstein J. Nanotechnol.

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The optical and biological properties of functionalized gold nanoparticles (GNPs) have been widely used in sensing applications. GNPs have a strong binding ability to thiol groups. Furthermore, thiols are used to bind functional molecules, which can then be used, for example, to detect metal ions in solution. Herein, we describe 13 nm GNPs functionalized by glutathione (GSH) and conjugated with a rhodamine 6G derivative (Rh6G2), which can be used to detect Hg(II) in cells. The detection of Hg2+ ions is based on an ion-catalyzed hydrolysis of the spirolactam ring of Rh6G2, leading to a significant change in the fluorescence of GNPs-GSH-Rh6G2 from an “OFF” to an “ON” state. This strategy is an effective tool to detect Hg2+ ions. In cytotoxicity experiments, GNPs-GSH-Rh6G2 could penetrate living cells and detect mercury ions through the fluorescent “ON” form.

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Rhodamine capped gold nanoparticles for the detection of Cr3+ ion in living cells and water samples

Cited by 20 publications

References 63 publications

Colorimetric detection of Cr3+ based on gold nanoparticles functionalized with 4-mercaptobenzoic acid

Colorimetric detection of Cr3+ based on gold nanoparticles functionalized with 4-mercaptobenzoic acid

Graphene Nanobuds: A New Second-Generation Phosgene Sensor with Ultralow Detection Limit in Aqueous Solution

Detection and imaging of Hg(II) in vivo using glutathione-functionalized gold nanoparticles

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