Recent progress in fluorescent probes for detection of carbonyl species: Formaldehyde, carbon monoxide and phosgene

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Fluorescent probes for the detection of disease-associated biomarkers.

In this study, the Cu2MoS4/WO3 supported on chitosan was prepared by precipitation method, and applied to photocatalyst, antibacterial agent and biosensor. The presence of WO3 and Cu2MoS4 crystals were confirmed by XRD analysis. The elemental information was investigated by EDS. FTIR spectra shows the presence of chitosan in nanocomposites. The as-synthesized Cu2MoS4/WO3/Chitosan nanocomposites has a bandgap of 2.18 eV and it is effective for visible light condition. The average particle size of the Cu2MoS4/WO3/Chitosan is 71 nm. The photocatalysis activity Cu2MoS4/WO3/Chitosan was higher than Cu2MoS4 or WO3.The Cu2MoS4/WO3/Chitosan nanocomposites shows the highest efficiency (100%) in photocatalysis degradation of dye under visible light irradiation in 80 min. The •O2- plays a main role in degradation process. The as-synthesized Cu2MoS4/WO3/Chitosan nanocomposites depicted the antibacterial activity toward G+/- bacteria. Determination of enterococcus faecalis is important for human health. The DNA template was used to the Cu2MoS4/WO3/Chitosan nanocomposites and applied in detection of enterococcus faecalis by H2O2 and 3,3',5,5' -tetramethylbenzidine in peroxidase like activity. The detection limit of enterococcus faecalis by DNA-Cu2MoS4/WO3/Chitosan in peroxidase-like catalysis was about 55 CFU/mL. Therefore, the Cu2MoS4/WO3/Chitosan can be applied in the photocatalysis, bactericidal and peroxidase process. 

Fabrication of Cu2MoS4 decorated WO3 nano heterojunction embedded on chitosan: Robust photocatalytic efficiency, antibacterial performance, and bacteria detection by peroxidase activity

In this study, the Cu2MoS4/WO3 supported on chitosan was prepared by precipitation method, and applied to photocatalyst, antibacterial agent and biosensor. The presence of WO3 and Cu2MoS4 crystals were confirmed by XRD analysis. The elemental information was investigated by EDS. FTIR spectra shows the presence of chitosan in nanocomposites. The as-synthesized Cu2MoS4/WO3/Chitosan nanocomposites has a bandgap of 2.18 eV and it is effective for visible light condition. The average particle size of the Cu2MoS4/WO3/Chitosan is 71 nm. The photocatalysis activity Cu2MoS4/WO3/Chitosan was higher than Cu2MoS4 or WO3.The Cu2MoS4/WO3/Chitosan nanocomposites shows the highest efficiency (100%) in photocatalysis degradation of dye under visible light irradiation in 80 min. The •O2− plays a main role in degradation process. The as-synthesized Cu2MoS4/WO3/Chitosan nanocomposites depicted the antibacterial activity toward G+/− bacteria. Determination of enterococcus faecalis is important for human health. The DNA template was used to the Cu2MoS4/WO3/Chitosan nanocomposites and applied in detection of enterococcus faecalis by H2O2 and 3,3′,5,5′ -tetramethylbenzidine in peroxidase like activity. The detection limit of enterococcus faecalis by DNA-Cu2MoS4/WO3/Chitosan in peroxidase-like catalysis was about 65 CFU/mL. Therefore, the Cu2MoS4/WO3/Chitosan can be applied in the photocatalysis, bactericidal and peroxidase process.

Since the first report of an F− fluorescent chemodosimeter based on Si–F chemistry, this sensing strategy will have reached two decades of progress by 2020; especially in the last ten years an explosion of the research in this field was observed. In this review, we will emphasize representative examples during different important stages in this field, provide critical commentary on the sensing performance of various developed chemodosimeters, imaging agents and nanosensors, point out the shortcomings and limitations of current systems, and give a perspective on possible future research directions after twenty years of evolvement.

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Fluorescent chemodosimeters for fluoride ions via silicon-fluorine chemistry: 20 years of progress

A colorimetric and ratiometric fluorescent probe with ultralow detection limit and high selectivity for phosgene sensing

Nitric oxide (NO), a widespread signaling transduction molecule in organism, plays key roles in lots of pathophysiological processes. Aberrant level of NO is closely related to tumors, cardiovascular and cerebrovascular diseases, neurodegenerative diseases and many other diseases. Therefore, sensing NO in cells and in vivo is of great significance for the study of the chemical biology of related diseases. Herein, a novel ratiometric fluorescence probe (AC-SA), in which anthracene carboximide used as fluorophore and secondary amines at the 6th position of the fluorophore severed as recognition moiety is rationally designed to detect NO. The AC-SA can capture NO via N-nitrosation reaction to give obvious fluorescence signal change from red to green based on the intramolecular charge transfer (ICT) mechanism. The AC-SA features striking ratiometric signal (I525/I625), good sensitivity (4.05 nM), high selectivity for sensing NO over various interferents in physiological pH. More important, the AC-SA can be applied to image endogenous NO in Raw 264.7 macrophage cells as well as zebrafish in a ratiometric manner.

Liping Huang

Papers

A colorimetric and ratiometric fluorescent probe with ultralow detection limit and high selectivity for phosgene sensing

A novel N-nitrosation-based ratiometric fluorescent probe for highly selective imaging endogenous nitric oxide in living cells and zebrafish

1,6-Elimination reaction induced detection of fluoride ions in vitro and in vivo based on a NIR fluorescent probe.

A new carbazole-based colormetric and ratiometric fluorescent probe for hypochlorite sensing in living cells and zebrafishes