Inner-filter Effect Induced Fluorescence Quenching of Carbon Dots for Cr(VI) Detection with High Sensitivity

Liu, Tao; Zhang, Shuai; Fan, Xiaoyu; Yang, Dou; Wang, Min; Shao, Xiaodong; Wang, Shuhao; Yue, Qiaoli

doi:10.1007/s10895-022-03028-8

Cited by 8 publications

(1 citation statement)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Due to their carbonaceous nature, they present lower toxicity than QDs [ 16 , 17 ], which is in accordance with green chemistry. Finally, CDs have been successfully used to selectively detect different heavy metal ions in water by easy methods of preparation and functionalization [ 18 , 19 ]. CDs can be easily modified by element doping [ 1 ].…”

Section: Introductionmentioning

confidence: 99%

Live synthesis of selective carbon dots as fluorescent probes for cobalt determination in water with an automatic microanalyzer

Pascual-Esco,

Lleonart,

Calvo-López

et al. 2023

Microchim Acta

View full text Add to dashboard Cite

A new strategy integrating the straight synthesis of carbon dots (CDs) and their direct use for the determination of heavy metals by means of fluorescence quenching is presented. The proposal consists of a modular analyzer, which includes a low temperature co-fired ceramics (LTCC) microreactor for the synthesis of CDs and a cyclic olefin copolymer (COC) microfluidic platform, which automatically performs a reverse flow injection analysis (rFIA) protocol for the determination of heavy metal ions in water by CD fluorescence quenching. As a proof of concept, nitrogen-doped CDs were synthesized from acrylic acid and ethylenediamine (ED) with quantum yields (QYs) of up to 44%, which are selective to cobalt. With the described system, we synthesized homogeneous CDs without the need for further purification and with the minimum consumption of reagents, and optimized fluorescence measurements can be performed with freshly obtained luminescent nanomaterials that have not undergone decomposition processes. They have an average hydrodynamic diameter of 4.2 ± 0.9 nm and maximum excitation and emission wavelengths at 358 nm and 452 nm, respectively. The system allows the automatic dilution and buffering of the synthesized CDs and the sample prior to the determination of cobalt. The concentration of cobalt was determined with good sensitivity and a limit of detection of 7 μg·L−1 with a linear range of 0.02–1 mg·L−1 of Co2+. Spiked tap water and river water samples were analyzed, obtaining recovery from 98 to 104%. This demonstrates the potential of the equipment as an efficient on-site control system for heavy metal monitoring in water. Graphical abstract

show abstract

Section: Introductionmentioning

confidence: 99%

Live synthesis of selective carbon dots as fluorescent probes for cobalt determination in water with an automatic microanalyzer

Pascual-Esco,

Lleonart,

Calvo-López

et al. 2023

Microchim Acta

View full text Add to dashboard Cite

show abstract

P‐doped carbon dot nano‐probe for inner filter effect–based determination of sarecycline in pharmaceutical dosage form and human plasma

Elshenawy,

Yassin,

Marie

2024

Luminescence

View full text Add to dashboard Cite

Based on novel phosphorus‐doped carbon dots (PCDs), a simple, quick, and accurate fluorescence probe for sarecycline (SAR) determination has been created. The PCDs were prepared in just five minutes using green, straightforward one‐step microwave pyrolysis. To create the PCD probe, sodium phosphate monobasic was utilized as a phosphorus dopant and citric acid as a carbon supply. The proposed synthesis method was energy efficient and yielded CDs with a narrow particle size distribution. Based on inner‐filter effect mechanism, the generated PCDs were used as nano‐probe for SAR determination. The fluorescence quenching intensity showed a strong linear relationship with SAR concentration in the 3–90‐μM range with a detection limit of 0.88 μM. Because there is no surface alteration of the CDs or creation of a covalent bond between SAR and PCDs, the developed approach is quick, easy, inexpensive, and requires less time. The new probe's enhanced sensitivity, broad linear range, and acceptable selectivity made it suitable for SAR measurement in pharmaceutical formulations and spiked human plasma. Most importantly, the Green Analytical Procedure Index (GAPI) and Analytical GREEnness (AGREE) assessments showed that the suggested method was environmentally friendly.

show abstract

Silicon Doped Carbon Dots as an New Ratiometric Fluorescence Probe for Proanthocyanidins Assay Based on the Redox Reaction Between Cr(VI) and Proanthocyanidins

Fan

et al. 2023

J Fluoresc

View full text Add to dashboard Cite

Inner-filter Effect Induced Fluorescence Quenching of Carbon Dots for Cr(VI) Detection with High Sensitivity

Cited by 8 publications

References 36 publications

Live synthesis of selective carbon dots as fluorescent probes for cobalt determination in water with an automatic microanalyzer

Live synthesis of selective carbon dots as fluorescent probes for cobalt determination in water with an automatic microanalyzer

P‐doped carbon dot nano‐probe for inner filter effect–based determination of sarecycline in pharmaceutical dosage form and human plasma

Silicon Doped Carbon Dots as an New Ratiometric Fluorescence Probe for Proanthocyanidins Assay Based on the Redox Reaction Between Cr(VI) and Proanthocyanidins

Contact Info

Product

Resources

About