A single fluorescent chemosensor for discriminative detection of bisulfite and benzoyl peroxide in food with different emission

A smartphone-adaptable fluorescent sensing tag for non-contact and visual monitoring of the freshness of fish

“…Compound 1 and compound 2 were prepared according to references. 29 Compound 2 (518 mg, 2 mmol) and malononitrile (142 μL, 3 mmol) in 10.0 mL absolute ethanol was stirred at room temperature. Then, a drop of piperidine was added as a catalyst, and the mixture was refluxed under a nitrogen atmosphere for 5 h. After the solution was cooled down to room temperature, some black solids precipitated from the reaction solution.…”

“…N-Butyl-8-methoxy-phenothiazine was synthesized from 8-methoxy-phenothiazine by n-butylbromide alkylation, and then subjected to a Vilsmeier reaction with POCl 3 /DMF to give N-butyl-8-methoxy-phenothiazine-7-aldehyde (PTCHO). 29 Finally, PTCHO underwent Knovenegel condensation reaction with malononitrile to produce the fluorescent probe PTCN. In PTCN, 8-methoxy-phenothiazine as electron donor (D) was connected with a strong electron acceptor (A) malononitrile to form a D-π-A structure.…”

A susceptible multifunctional fluorescent probe based on levulinic acid for the practical detection of SO2

“…However, most of these probes are only used for the individual detection of organisms and are rarely applied for detecting SO 2 in the virtual environment. [17][18][19][20][21][22][23][24][25][26][27][28][29][30] Hence, a probe, SO-2, was developed that can track SO 2 concentration at the cellular level and shows precise detection. The probe was successfully applied to trace SO 2 in cells, and water samples, and test paper experiments were successfully implemented for practical applications.…”

Colorimetric Sensing of Benzoyl Peroxide Based on the Emission Wavelength-Shift of CsPbBr3 Perovskite Nanocrystals

“…As shown in Table S2, there have been a variety of determination methods for BPO such as gas chromatography (GC) [28], high-performance liquid chromatography (HPLC) [29][30][31], capillary electrophoresis (CE) [32], the electrochemical method [33,34], chemiluminescence [35,36], and the other optical methods [37][38][39][40][41]. To discover the presence of BPO easily and quickly, further efforts are necessary to develop real-time methods, including colorimetric determination.…”