Pyrene-based polymer fluorescent materials for the detection of 2,4,6-trinitrophenol and cell imaging

Cy5 Dye Cassettes Exhibit Through-Bond Energy Transfer and Enable Ratiometric Fluorescence Sensing

“…Deep-red cyanine dyes are known to self-aggregate in aqueous solution and form nonfluorescent aggregates. On the other hand, pyrene dyes can form excimers in self-aggregation conditions, − ,− and TPE is also well-known for aggregation induced enhancement (AIE). , To probe the change in fluorescent properties upon dye cassette self-aggregation, we acquired absorption (Figure a–d) and emission (Figures S2–S5) spectra for each dye in water/methanol mixtures. In the case of the relatively hydrophobic dyes, 1P or 1T , the transition from 100% methanol to 99.5% water induced minor spectral changes indicating little formation of dye self-aggregates.…”

Ultrasensitive fluorescence detection of nitro-explosives by dihydro-oxoisobenzofuranyl-phthalazinone obtained from the Cd(ii)-catalyzed cyclization of azinodimethylidyne-benzoic acid

“…Ltd and were purified before use. 33 The key reagents were 2-carboxybenzaldehyde and hydrazine monohydrate, NaNO 3 , Ca 4), 2-isopropylphenol (5), 2,4,6-trinitrophenol (6), 2,4-dibromophenol (7), 3-chlorophenol (8), 2,4,6-trichlorophenol (9), 2,4-dichlorophenol (10), quinol (11), phenol (12), resorcinol (13), 4-chloroaniline (14), tert-butylaniline (15), 2chloroaniline ( 16), 2,4-difluoroaniline (17), and aniline (18) were procured from Sigma Aldrich Pvt. Ltd and Alfa Aesar Pvt.…”

“…Further, PA is also utilized in a variety of sectors and products, such as dyes, pesticides, medicines, drug analysis, chemical fibers, chemical laboratories, propellants, and pyrotechnics. 11,14–17 Interestingly, 2-nitrophenol is also an organic compound belonging to the nitroaromatic group and is widely used to make intermediates, explosives, fungicides, gases, herbicides, insecticides, pharmaceuticals, pesticides, and petroleum products, as well as pigments, rubber chemicals, synthetic dyes, textiles, and wood products. 18 It can cause high toxicity or mutagenicity for living organisms directly or through its catabolic metabolites, as it is the most persistent and toxic organic pollutant of industrial waste water.…”

Substituent Effect: Synthesis of Three TNP‐Detecting Fluorescent Probes Based on Triazolothiadiazole‐Quinazolinone**

“…As for the fluorescence detection, it has obvious advantages such as easy operation, high selectivity, low sample destructiveness and visual detection, so it has been widely used. [24][25][26][27][28] In recent years, some compounds for fluorescently detecting TNP have been synthesized, mainly including triazine, fluorescein, naphthimide and other single fluorophore molecules, but the fluorescence intensities of the compounds containing single fluorophore are relatively weak, the fluorescence emission wavelengths are relatively small, and the TNP recognition effect is not significant. [29][30][31][32][33] Quinazolinone contains two nitrogen atoms, which has excellent conjugated structure and optical properties, and can be modified at multiple sites.…”