Rahimi, Fatemeh published the artcileNitrogen-rich silicon quantum dots: facile synthesis and application as a fluorescent ‘on-off-on’ probe for sensitive detection of Hg2+ and cyanide ions, Quality Control of 13822-56-5, the publication is Luminescence (2022), 37(4), 598-609, database is CAplus and MEDLINE.
The sensitive and reliable detection of Hg2+ and CN– as harsh environmental contaminants are of great importance. In view of this, a novel ‘on-off-on’ fluorescent probe based on nitrogen-rich silicon quantum dots (NR-SiQDs) has been designed for sensitive detection of Hg2+ and CN– ions in aqueous medium. NR-SiQDs were synthesized using a facile, one-step, and environment friendly procedure in the presence of 3-aminopropyl trimethoxysilane (APTMS) and ascorbic acid (AA) as precursors, with L-asparagine as a nitrogen source for surface modification. The NR-SiQDs exhibited strong fluorescence emission at 450 nm with 42.34% quantum yield, satisfactory salt tolerance, and superior photostability and pH stability. The fluorescence emission was effectively quenched using Hg2+ (turn-off) due to the formation of a nonfluorescent stable NR-SiQDs/Hg2+ complex, whereas after the addition of cyanide ions (CN-), Hg2+ ions could be leached from the surface of the NR-SiQDs and the fluorescence emission intensity of the quenched NR-SiQDs fully recovered (turn-on) due to the formation of highly stable [Hg(CN)4]2- species. After optimizing the response conditions, the obtained limits of detection were found to be 53 nM and 0.46μM for Hg2+ and CN–, resp. Finally, the NR-SiQD-based fluorescence probe was utilized to detect Hg2+ and CN– ions in water samples and satisfactory results were obtained, suggesting its potential application for environmental monitoring.
Luminescence published new progress about 13822-56-5. 13822-56-5 belongs to catalysis-chemistry, auxiliary class Organic Silicones, name is 3-(Trimethoxysilyl)propan-1-amine, and the molecular formula is C6H17NO3Si, Quality Control of 13822-56-5.
Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia