Nitrogen-doped carbon dots used as an “on–off–on” fluorescent sensor for Fe3+ and glutathione detection

Liang, Yan; Xu, Lingxia; Tang, Ke; Guan, Yutong; Wang, Ting; Wang, Hua; Yu, William W.

doi:10.1016/j.dyepig.2020.108358

Cited by 71 publications

(23 citation statements)

References 53 publications

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“…[25,26] The representative carbon-based QDs, graphene QDs (GQDs) and carbon dots (CDs), have been widely used in fluorescent sensors for metal ions (such as Fe 3+ , Cu 2+ , Hg 2+ ), [21,27,28] the detection is influenced by the aspects of internal structure, surface state, and doping elements. [29] For Fe 3+ detection, the effective strategy is N or S doping, [30,31] which complicate the preparation of carbon-based QDs. Furthermore, the doping of heteroatoms such as N and S will increase the affinity of carbon-based QDs sensors to many other metal ions, which leading the low selectivity.…”

Section: Introductionmentioning

confidence: 99%

Subsequent monitoring of ferric ion and ascorbic acid using graphdiyne quantum dots-based optical sensors

Bai

Zhang

et al. 2020

Microchim Acta

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Graphdiyne (GDY) as an emerging carbon nanomaterial has attracted increasing attention because of its uniformly distributed pores, highly π-conjugated, and tunable electronic properties. These excellent characteristics have been widely explored in the fields of energy storage, catalysts, there is yet report on the sensors development based on its outstanding optical property. In this paper, we report on a new sensing mechanism built upon the synergistic effect between inner filter effect and photoinduced electron transfer. We constructed a novel nanosensor based upon the newly-synthesized nanomaterial and demonstrated a sensitive and selective detection for both ion (Fe 3+ ) and ascorbic acid, enabling the measurements in real clinical samples. We firstly prepared fluorescent graphdiyne oxide quantum dots (GDYO-QDs) with a facile ultrasonic protocol and characterized them with a range of techniques, showing a strong blue-green emission with 14.6% quantum yield. And it can be quenched efficiently by Fe 3+ and recovered by ascorbic acid (AA). We have fabricated a Off/On fluorescent nanosensors based on the unique property. Our nanosensors are able to detect Fe 3+ as low as 95 nmol L -1 with a promising dynamic range from 0.25 to 200 μmol L -1 . The LOD of AA was 2.5μmol L -1 , with range of 10-500 μmol L -1 . It showed a promising capability to detect Fe 3+ and AA in serum samples compared to refereed technique.

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Section: Introductionmentioning

confidence: 99%

Subsequent monitoring of ferric ion and ascorbic acid using graphdiyne quantum dots-based optical sensors

Bai

Zhang

et al. 2020

Microchim Acta

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“…DF Cu-off and DF AA-on had similar changing trends with pH, and both had the best values when pH ¼ 7.0. The reasons for this phenomenon may be the same as that DF Cu-off and DF AAon that (1) the interaction between N,S-CDs and Cu(II) would be enhanced with the increase in pH (3.0-7.0) (DF Cu-off [), and weakened with the increase in pH (7.0-13.0) due to the side reaction coefficient of hydroxyl increased in the alkaline medium (DF Cu-off Y); [22][23][24] (2) AA in the enediol group and the lactone group were easily deprotonated to radical cation at suitable pH, thus binding with Cu(II) stably (DF AA-on [); however, the hydrolysis of the lactone ring in AA and the structure of AA would be destroyed under alkaline conditions, and the hydrolysis of AA was greater than the redox effects. 25 Therefore, the pH value of the system was controlled to 7.0 in the process of detecting Cu(II) and AA.…”

Section: Optimization Of the Detection Conditions For Cu(ii) And Aamentioning

confidence: 95%

A facile green and one-pot synthesis of grape seed-derived carbon quantum dots as a fluorescence probe for Cu(ii) and ascorbic acid

Zhu

2021

RSC Adv.

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“…To ensure all complexes set in minima potential energy surfaces, frequency calculations were processed at the same level of theory. GAUSSIAN (09 Revision 01, Gaussian Inc, Wallingford, CT, USA) and Gauss View (5.08, Gaussian Inc, Wallingford, CT, USA) were used to observe all the electronic structure calculations [20].…”

Section: Theoretical Calculationsmentioning

confidence: 99%

“…Li et al, prepared CDs with high detection efficiency for Fe 3+ to be applied in bioimaging [19]. In our previous work, a novel N-doped carbon dots for Fe 3+ detection was demonstrated and utilized as an "on-off-on" fluorescent sensor for Streptococcus thermophilus stain-screening [20]. However, few works related to LF detection with a fluorescent sensor have been reported up to now.…”

Section: Introductionmentioning

confidence: 99%

Carboxyl-Rich Carbon Dots as Highly Selective and Sensitive Fluorescent Sensor for Detection of Fe3+ in Water and Lactoferrin

et al. 2021

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As lactoferrin (LF) plays an essential role in physiological processes, the detection of LF has attracted increasing attention in the field of disease diagnosis. However, most current methods require expensive equipment, laborious pretreatment, and long processing time. In this work, carboxyl-rich carbon dots (COOH-CDs) were facilely prepared through a one-step, low-cost hydrothermal process with tartaric acid as the precursor. The COOH-CDs had abundant carboxyl on the surface and showed strong blue emission. Moreover, COOH-CDs were used as a fluorescent sensor toward Fe3+ and showed high selectivity for Fe3+ with the limit of detection (LoD) of 3.18 nM. Density functional theory (DFT) calculations were performed to reveal the mechanism of excellent performance for Fe3+ detection. Meanwhile, COOH-CDs showed no obvious effect on lactobacillus plantarum growth, which means that COOH-CDs have good biocompatibility. Due to the nontoxicity and excellent detection performance for Fe3+, COOH-CDs were employed as a fluorescent sensor toward LF and showed satisfying performance with an LoD of 0.776 µg/mL, which was better than those of the other methods.

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Nitrogen-doped carbon dots used as an “on–off–on” fluorescent sensor for Fe3+ and glutathione detection

Cited by 71 publications

References 53 publications

Subsequent monitoring of ferric ion and ascorbic acid using graphdiyne quantum dots-based optical sensors

Subsequent monitoring of ferric ion and ascorbic acid using graphdiyne quantum dots-based optical sensors

A facile green and one-pot synthesis of grape seed-derived carbon quantum dots as a fluorescence probe for Cu(ii) and ascorbic acid

Carboxyl-Rich Carbon Dots as Highly Selective and Sensitive Fluorescent Sensor for Detection of Fe3+ in Water and Lactoferrin

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