An “on-off-on” fluorescent nanoprobe for recognition of chromium(VI) and ascorbic acid based on phosphorus/nitrogen dual-doped carbon quantum dot

Gong, Xiaojuan; Liu, Yang; Yang, Zhenhua; Shuang, Shaomin; Zhang, Zeyu; Dong, Chuan

doi:10.1016/j.aca.2017.02.038

Cited by 219 publications

(79 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…BC‐dots was obtained by hydrothermal treatment of leaves from the sweet‐scented Osmanthus , and fluorescence quantum yield was calculated to be 13.70%, according to Gong' method . CS@AuNPs was synthesized with chitosan as both the stabilizing and reducing agent.…”

Section: Resultsmentioning

confidence: 99%

A dual‐readout nanosensor based on biomass‐based C‐dots and chitosan@AuNPs with hyaluronic acid for determination of hyaluronidase

et al. 2019

View full text Add to dashboard Cite

A dual-signal strategy is proposed based on fluorescent biomass-based carbon dots (BC-dots) and chitosan stabilized AuNPs (CS@AuNPs) to determine hyaluronidase (HAase). BC-dots can induce aggregation of CS@AuNPs nanoparticles with a colour change from red to blue. Positively charged CS@AuNPs interacted with the negatively charged hyaluronic acid (HA) through electrostatic adsorption, and CS@AuNPs maintained stability due to the semirigid coil conformation of HA. However, in the presence of HAase, due to enzymatic hydrolysis of HA by HAase, the CS@AuNPs agglomerated. Based on the change of fluorescence and colour, quantitative analysis of HAase was achieved. Linear ranges for the fluorometric and colorimetric determinations were 2.0-70 U mL −1 and 8-60 U mL −1 , respectively, with a detection limit of 0.27 U mL −1 . This dual-signal sensing system possesses high potential for determination of HAase in biological matrices.

show abstract

Section: Resultsmentioning

confidence: 99%

A dual‐readout nanosensor based on biomass‐based C‐dots and chitosan@AuNPs with hyaluronic acid for determination of hyaluronidase

et al. 2019

View full text Add to dashboard Cite

show abstract

“…Many of the presented examples, notably with a naphthalimide fluorophore, are naturally suited as fluorescent cellular imaging probes and as potential cancer therapy agents [51,52]. Other avenues to consider are the development of solid-bound fluorescent Pourbaix sensors [49] and luminescent-based nanomaterial platforms (e.g., carbon quantum dot sensors [53,54]).…”

Section: Discussionmentioning

confidence: 99%

Recent Progress on the Evolution of Pourbaix Sensors: Molecular Logic Gates for Protons and Oxidants

Magri

2018

Chemosensors

View full text Add to dashboard Cite

Recent progress in the area of molecular logic, in particular molecules capable of sensing for acidity and oxidizability, are gathered together in this short review. Originally proposed as AND logic gates that provide a high fluorescence output when simultaneously protonated and oxidized, the concept has been extended from two-input to three-input variants and to include molecules that function as INHIBIT logic gates. Photochemical concepts such as photoinduced electron transfer (PET) and internal charge transfer (ICT) are exploited as favorite design concepts. This review highlights the evolution of Pourbaix sensors with anthracene, pyrazoline, and naphthalimide fluorophores. Future applications abound in various disciplines from corrosion science, material science, geochemistry to cell imaging.

show abstract

“…17,18 Till now, various QDs fluorescence sensors (e.g. CdTe, 19 Cu-ZnCdS, 20 MnO2, MoS2, and AuNCs) have been developed for highly sensitive and selective detection of AA in real samples. 21,22 However, these QDs exhibited various limitations, including complicated and expensive preparation processes, poor biocompatibility, and negative effect on food and the environment.…”

Section: Introductionmentioning

confidence: 99%

Microwave-assisted Synthesis of N,S-co-carbon Dots as Switch-on Fluorescent Sensor for Rapid and Sensitive Detection of Ascorbic Acid in Processed Fruit Juice

et al. 2019

ANAL. SCI.

View full text Add to dashboard Cite

To achieve a rapid, sensitive, and economical method for the detection of ascorbic acid (AA) in the presence of Fe 3+ , a nitrogen and sulfur co-doped carbon dots (N,S-co-CDs) based fluorescence sensing system was developed. In this work, N,S-co-CDs were successfully synthesized via a one-step microwave-assisted method within 2.5 min using ammonium citrate and L-cysteine as precursors. The fluorescence of N,S-co-CDs was quenched (off) by Fe 3+ through a static-quenching mechanism. Subsequently, the fluorescence was recovered (on) after introducing AA into the quenched system, which was attributed to the reduction effect of AA for Fe 3+. Therefore, a switch-on sensor (N,S-co-CDs/Fe 3+ system) was developed for AA detection. Under optimal conditions, the limit of detection (LOD) of 2.31 μmol/L for AA was obtained over a linear range from 0 to 150 μmol/L. Furthermore, the proposed sensing method was successfully applied to detect AA in processed fruit juice with satisfactory results. The most important is that the sensor derived from a microwave-assisted method has simple and eco-friendly synthesis processes, is rapid, and has high detection efficiency. Therefore, such a switch-on sensor may be a promising candidate sensor for AA detection in processed fruit samples.

show abstract

An “on-off-on” fluorescent nanoprobe for recognition of chromium(VI) and ascorbic acid based on phosphorus/nitrogen dual-doped carbon quantum dot

Cited by 219 publications

References 45 publications

A dual‐readout nanosensor based on biomass‐based C‐dots and chitosan@AuNPs with hyaluronic acid for determination of hyaluronidase

A dual‐readout nanosensor based on biomass‐based C‐dots and chitosan@AuNPs with hyaluronic acid for determination of hyaluronidase

Recent Progress on the Evolution of Pourbaix Sensors: Molecular Logic Gates for Protons and Oxidants

Microwave-assisted Synthesis of N,S-co-carbon Dots as Switch-on Fluorescent Sensor for Rapid and Sensitive Detection of Ascorbic Acid in Processed Fruit Juice

Contact Info

Product

Resources

About