Highly selective and sensitive sensing for Al3+ and F− based on green photoluminescent carbon dots

RSC Advances ◽  
2016 ◽  
Vol 6 (99) ◽  
pp. 97346-97351 ◽  
Author(s):  
Xiang-Ying Sun ◽  
Lu-Lu Wu ◽  
Jiang-Shan Shen ◽  
Xue-Gong Cao ◽  
Cunjin Wen ◽  
...  
Keyword(s):  
Metal Ions ◽  
Carbon Dots ◽  
High Sensitivity ◽  
Sensitivity And Selectivity

A novel sensor for metal ions by mean of CDs with a PL enhancement response, which shows high sensitivity and selectivity. Furthermore, the CDs-Al3+ ions system could be employed to probe F− anions based on a PL “on–off” model.

A metal-organic framework featuring highly sensitive fluorescence sensing for Al3+ ion

CrystEngComm ◽  
2021 ◽  
Author(s):  
Yang Qiao ◽  
Zeqi Li ◽  
Mei-Hui Yu ◽  
Ze Chang ◽  
Xian-He Bu
Keyword(s):  
Metal Ions ◽  
Human Health ◽  
Metal Organic Framework ◽  
High Sensitivity ◽  
Fluorescence Sensing ◽  
Sensing Material ◽  
Highly Sensitive ◽  
Sensitivity And Selectivity ◽  
Metal Organic ◽  
Organic Framework

High sensitivity and selectivity for detection of metal ions are very important to protect human health. Fluorescent metal-organic framework (MOF) as a new sensing material has attracted more and more...

scholarly journals A Review on 2,6-Diformyl-4-methylphenol Derived Schiff Bases as Fluorescent Sensors

2020 ◽  
Vol 32 (8) ◽  
pp. 1837-1848
Author(s):  
Mrinal sarkar
Keyword(s):  
Schiff Base ◽  
Metal Ions ◽  
High Sensitivity ◽  
Electronic Configuration ◽  
Fluorescent Sensors ◽  
Intermolecular Hydrogen Bonding ◽  
Fluorescent Chemosensors ◽  
Emission Mechanism ◽  
Sensitivity And Selectivity ◽  
Transfer Mechanisms

2,6-Diformyl-4-methylphenol fluorophore derived Schiff base sensors detect metal ions such as Zn2+, Al3+, Hg2+, Cd2+, Sn2+ and Cu2+ with high sensitivity and selectivity through changes in fluorescence intensity based on CHEF, ICT, FRET, ESIPT, C=N isomerization and PET mechanism. Several anions viz. HPO4 2–, H2PO4 –, PO4 3–, AsO3 3–, H2AsO4 –, AsO2 –, PPi (pyrophosphate), I–, F– and N3 – were also detected through intermolecular hydrogen bonding (between sensor and anion) based on TICT, PET, CHEF, ESIPT and aggregation induced emission mechanism. Selectivity and sensitivity for these metal ions and anions were achieved by introducing various amines to core fluorophore 2,6-diformyl-4-methylphenol. Majority of these fluorescent sensors were Zn2+ ion selective. Due to the filled d10 electronic configuration of Zn2+ ion usually does not show deactivation of excited state via any electron or energy transfer mechanisms. Both solvent dependent and independent ten multi-ion selective sensors are found. This review will consolidate on 2,6-diformyl-4-methylphenol derived Schiff base fluorescent chemosensors.

Green preparation of carbon dots for Hg2+ detection and cell imaging

2020 ◽  
Vol 10 (11) ◽  
pp. 1777-1787
Author(s):  
Yadian Xie ◽  
Shanshan Wang ◽  
Ning Fu ◽  
Yan Yang ◽  
Xingliang Liu ◽  
...  
Keyword(s):  
Photoelectron Spectroscopy ◽  
Carbon Dots ◽  
High Sensitivity ◽  
Amorphous Structure ◽  
X Ray Diffraction ◽  
X Ray ◽  
Carbon And Nitrogen ◽  
Transmission Electron ◽  
Sensitivity And Selectivity ◽  
Ft Ir

Carbon dots (CDs) also nitrogen-doped CDs (N-CDs) were produced by green hydrothermal synthesis using Pea and ethanediamine as the carbon and nitrogen source, separately. Transmission electron microscopy (TEM) images displayed that the prepared CDs and N-CDs were well dispersed, had a spherical morphology. X-ray diffraction (XRD) figures of CDs and N-CDs presented a graphitic amorphous structure. Fourier transform infrared spectroscopy (FT-IR) verified that CDs and N-CDs carried many different hydrophilic groups (for example hydroxyl, carboxyl/carbonyl, amide, amino groups) on the surface, X-ray photoelectron spectroscopy (XPS) together verified this result. However, the optical properties and fluorescence quantum yield for N-CDs were obviously superior to those of CDs. Furthermore, the prepared N-CDs displayed outstanding advantages including low toxicity, satisfactory biocompatibility, and excellent chemical stability. More prominently, the prepared N-CDs could detect Hg2+ ions with high sensitivity and selectivity in both water samples and HeLa cells.

Carbon dots–MnO2 nanocomposites for As(iii) detection in groundwater with high sensitivity and selectivity

2020 ◽  
Vol 12 (46) ◽  
pp. 5572-5580
Author(s):  
Xiaoyu He ◽  
Yong Li ◽  
Chao Yang ◽  
Liqiang Lu ◽  
Yulun Nie ◽  
...  
Keyword(s):  
Human Health ◽  
Carbon Dots ◽  
High Sensitivity ◽  
Environmental Safety ◽  
Sensitivity And Selectivity

As(iii) pollution has caused increasing concern due to its significant impact in environmental safety and human health.

Valine-derived carbon dots with colour-tunable fluorescence for the detection of Hg2+ with high sensitivity and selectivity

2015 ◽  
Vol 39 (8) ◽  
pp. 6201-6206 ◽  
Author(s):  
Chunfang Zhang ◽  
Zhongbo Hu ◽  
Li Song ◽  
Yanyan Cui ◽  
Xiangfeng Liu
Keyword(s):  
Carbon Dots ◽  
High Sensitivity ◽  
Sensitivity And Selectivity ◽  
Fluorescent Carbon Dots ◽  
Fluorescent Carbon

Green and yellow fluorescent carbon dots with high sensitivity and selectivity for Hg2+ were synthesized from H3PO4 oxidation of valine.

A Simple and Sensitive Colorimetric Detection of Silver Ions Based on Cationic Polymer-Directed AuNPs Aggregation

2013 ◽  
Vol 66 (1) ◽  
pp. 113 ◽  
Author(s):  
Faze Wang ◽  
Yuangen Wu ◽  
Shenshan Zhan ◽  
Lan He ◽  
Wenting Zhi ◽  
...  
Keyword(s):  
Metal Ions ◽  
Colorimetric Detection ◽  
High Sensitivity ◽  
Silver Ions ◽  
Cationic Polymer ◽  
Charge Balance ◽  
Remarkable Change ◽  
Sensing Platform ◽  
Sensitivity And Selectivity ◽  
Positively Charged

This paper describes a simple and sensitive colorimetric sensor employing single-stranded DNA (ssDNA) ligand, cationic polymer, and gold nanoparticles (AuNPs) to detect silver ions. The positively charged polymer can electrostatically interact with ssDNA and destroy the charge balance leading to induction of AuNP aggregation. Silver ions (Ag+) can bind to cytosine (C)-rich nucleic acids to form the C-Ag+-C hair-pin structure, which can prevent its interaction with polymers. The resulting cationic polymer could aggregate AuNPs causing a remarkable change in colour. The concentration of Ag+ can be determined visually. This sensing platform exhibits high sensitivity and selectivity towards Ag+ versus other metal ions, with a detection limit of 48.6 nM. The assay did not require any labelling or modifying steps. This method is simple, effective, and convenient and can in principle be used to detect other metal ions or small molecules.

Highly selective and sensitive fluorescence probe based on thymine-modified carbon dots for Hg2+ and l-cysteine detection

RSC Advances ◽  
2015 ◽  
Vol 5 (108) ◽  
pp. 89121-89127 ◽  
Author(s):  
Hui Xu ◽  
Shanshan Huang ◽  
Caiyun Liao ◽  
Yang Li ◽  
Baozhan Zheng ◽  
...  
Keyword(s):  
Carbon Dots ◽  
Fluorescence Probe ◽  
High Sensitivity ◽  
Sensitivity And Selectivity

The as-prepared thymine-modified carbon dots were applied to as a sensor for detecting Hg2+ and l-cysteine with high sensitivity and selectivity.

scholarly journals Highly selective fluorescent carbon dots probe for mercury(ii) based on thymine–mercury(ii)–thymine structure

RSC Advances ◽  
2018 ◽  
Vol 8 (8) ◽  
pp. 3982-3988 ◽  
Author(s):  
Yong Li ◽  
Zhan-Yao Zhang ◽  
Hao-Fan Yang ◽  
Guang Shao ◽  
Feng Gan
Keyword(s):  
Carbon Dots ◽  
Fluorescent Sensor ◽  
High Sensitivity ◽  
Sensitivity And Selectivity ◽  
Fluorescent Carbon Dots ◽  
Fluorescent Carbon

A novel thymine-functional fluorescent sensor was developed for Hg2+detection with high sensitivity and selectivity.

scholarly journals Electrochemically assisted flexible lanthanide upconversion luminescence sensing of heavy metal contamination with high sensitivity and selectivity

2019 ◽  
Vol 1 (1) ◽  
pp. 265-272 ◽  
Author(s):  
Yuen-Ting Wong ◽  
Sin-Yi Pang ◽  
Ming-Kiu Tsang ◽  
Yan Liu ◽  
Haitao Huang ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Metal Contamination ◽  
Heavy Metal Ions ◽  
Heavy Metal Contamination ◽  
Upconversion Luminescence ◽  
High Sensitivity ◽  
Sensitivity And Selectivity ◽  
Electrochemical Effect ◽  
Sensing Performance

A flexible lanthanide upconversion luminescent composite probe demonstrated high sensing performance for heavy metal ions under an electrochemical effect.

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