Ratiometric fluorescent sensors for sequential on-off-on determination of riboflavin, Ag+ and l-cysteine based on NPCl-doped carbon quantum dots

Wang, Zihan; Zhang, Li; Hao, Yumin; Dong, Wenjuan; Liu, Yang; Shi, Sun; Shuang, Shaomin; Dong, Chuan; Gong, Xiaojuan

doi:10.1016/j.aca.2020.11.054

Cited by 50 publications

(46 citation statements)

References 58 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Optical performance of the C SM -dots was characterized by the UV−vis absorption spectrum and the FL spectrum under different excitation wavelengths. Figure 2a shows two obvious absorption peaks at 245 and 273 nm in UV-vis spectrum, which was ascribed to the typical absorptions of the π-π* transition and n-π* transition, respectively [9]. The above results are similar to those of multiple aromatic chromophores that originated from lignin, suggesting the existence of aromatic structures in C SM -dots [25].…”

Section: Optical Properties Of C Sm -Dotsmentioning

confidence: 64%

“…Over the past decades, optical sensors have been developed and utilized for Ag + determination at different levels [9][10][11]. Among them, the fluorescent sensor is regarded as a powerful analytical strategy for Ag + detecting due to its inherent merits, including easy operability, spatiotemporal resolution, and high sensitivity and selectivity [12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Nanosensors Based on Structural Memory Carbon Nanodots for Ag+ Fluorescence Determination

et al. 2021

View full text Add to dashboard Cite

Ag+ pollution is of great harm to the human body and environmental biology. Therefore, there is an urgent need to develop inexpensive and accurate detection methods. Herein, lignin-derived structural memory carbon nanodots (CSM-dots) with outstanding fluorescence properties were fabricated via a green method. The mild preparation process allowed the CSM-dots to remain plentiful phenol, hydroxyl, and methoxy groups, which have a specific interaction with Ag+ through the reduction of silver ions. Further, the sulfur atoms doped on CSM-dots provided more active sites on their surface and the strong interaction with Ag nanoparticles. The CSM-dots can specifically bind Ag+, accompanied by a remarkable fluorescence quenching response. This “turn-off” fluorescence behavior was used for Ag+ determination in a linear range of 5–290 μM with the detection limit as low as 500 nM. Furthermore, findings showed that this sensing nano-platform was successfully used for Ag+ determination in real samples and intracellular imaging, showing great potential in biological and environmental monitoring applications.

show abstract

Section: Optical Properties Of C Sm -Dotsmentioning

confidence: 64%

Section: Introductionmentioning

confidence: 99%

Nanosensors Based on Structural Memory Carbon Nanodots for Ag+ Fluorescence Determination

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Fig. 2a showed two obvious absorption peaks at 245 and 273 nm in UV−vis spectrum, which was ascribed to the typical absorptions of the π-π* transition and n-π* transition, respectively [9]. Above results are similar to that of multiple aromatic chromophores originated from lignin, suggesting the existence of aromatic structures in CSM-dots [25].…”

Section: Optical Properties Of Csm-dotsmentioning

confidence: 55%

“…Over the past decades, optical sensors have been developed and utilized for Ag + determination at different levels [9][10][11]. Among them, fluorescent sensors are regarded as a powerful analytical strategy for Ag + detecting due to its inherent merits including easy operability, spatiotemporal resolution and high sensitivity and selectivity [12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Nanosensors Based on Structural Memory Carbon Nanodots for Ag+ Fluorescence Determination

Zhou

Cao

Zhou

et al. 2021

Preprint

View full text Add to dashboard Cite

Ag+ pollution is great of harm to the human body and the biology. Therefore, it is an urgent need to develop inexpensive and accurate detection methods. Herein, lignin-derived structural memory carbon nanodots (CSM-dots) with outstanding fluorescence property were fabricated via a green method, which reserve functional and structural units of the precursor molecules. The CSM-dots could specifically bind Ag+, accompanied with a remarkable fluorescence quenching response. This “turn-off” fluorescence behavior was used for Ag+ determination in a linear range of 5-290 μM with the detection limit as low as 500 nM. Furthermore, the finding showed that this sensing nano-platform was successfully used for Ag+ determination in real samples and intracellular imaging, showing great potential in biological and environmental monitoring applications.

show abstract

“…Among nanocarbon materials, carbon dots (CDs) have been given much attention due to their properties such as low cytotoxicity, robust chemical inertness, and good biocompatibility, which are particularly useful in several areas like sensing, imaging, photodegradation, and theranostic applications [1][2][3][4][5][6]. On the other hand, modification of electronic structures of CDs by doping heteroatoms such as nitrogen is further beneficial, especially in sensing due to enhanced fluorescence quantum yields [6][7][8][9][10][11][12][13][14][15][16][17]. Hence, extensive research efforts have been dedicated to their synthesis [18][19][20].…”

Section: Introductionmentioning

confidence: 99%

N-Doped Carbon Dots Derived from Melamine and Triethanolamine for Selective Sensing of Fe3+ Ions

Munusamy

Sawminathan

Arumugham

et al. 2021

Journal of Nanomaterials

View full text Add to dashboard Cite

This work reports nitrogen-doped carbon dots (NCDs) as a selective sensing probe to detect Fe3+ in water samples. NCD probes were synthesized via solvothermal method using nitrogen-rich melamine and triethanolamine as precursors. Properties of the resulting NCDs were studied using different characterization techniques, through which N-doping was confirmed. The quantum yield of obtained NCDs was measured to be 21%. When excited at 370 nm, the excellent blue emission property makes this probe adoptable for selectively sensing Fe3+ in practical water samples. The limit of detection (LOD) was identified as 216 nM with a good linear range between the concentrations of 0.2-2 μM. The obtained LOD is far less than the World Health Organization (WHO) permissible limits of Fe3+ in water. Interference studies reveal that the presence of other competing ions did not alter the sensing of Fe3+, even at the presence of 10 equivalents which indicates the high selectivity of NCDs towards Fe3+. The reversibility studies showed that adding a cheap and readily available EDTA ligand to the NCD results in fluorescence regeneration, leading to exceptional reusability for the detection of Fe3+. So, the synthesized NCDs can be used as a suitable probe for the selective determination of Fe3+ in real water samples.

show abstract

Ratiometric fluorescent sensors for sequential on-off-on determination of riboflavin, Ag+ and l-cysteine based on NPCl-doped carbon quantum dots

Cited by 50 publications

References 58 publications

Nanosensors Based on Structural Memory Carbon Nanodots for Ag+ Fluorescence Determination

Nanosensors Based on Structural Memory Carbon Nanodots for Ag+ Fluorescence Determination

Nanosensors Based on Structural Memory Carbon Nanodots for Ag+ Fluorescence Determination

N-Doped Carbon Dots Derived from Melamine and Triethanolamine for Selective Sensing of Fe3+ Ions

Contact Info

Product

Resources

About