Determination of water in organic solvents and raw food products by fluorescence quenching of a crystalline vinyl-functionalized COF

Determination of Trace Water Using Fluorescence Probes Based on Nitrogen‐Doped Carbon Quantum Dot Fluorescence Senors (Y‐CDs and R‐CDs)

“…This indicates that the interaction between Y‐CDs and water occurs through hydrogen bonding between amine protons and oxygen atoms of water molecules. And water has better hydrogen bond formation ability than organic solvents, with small spatial hindrance and size, which to some extent avoids some organic solvents being able to quench fluorescence alone [39] …”

“…And water has better hydrogen bond formation ability than organic solvents, with small spatial hindrance and size, which to some extent avoids some organic solvents being able to quench fluorescence alone. [39] Based on the results of nuclear magnetic resonance spectroscopy, we can speculate that Y-CDs can be used for the determination of redox solvents in water such as DMSO, while the classical Karl Fischer method provides some problematic results.…”

Fluorescent covalent organic frameworks for environmental pollutant detection sensors and enrichment sorbents: a mini-review

“…By using the COF-TD as the bifunctional material, a multifunctional platform for the detection and enrichment of myricetin in vine tea was successfully constructed. The next year, in 2022, Li et al 18 developed a new COF using 4,4′,4’’-(1,3,5-triazine-2,4,6-triyl)trianiline (Tz) and 2,5-diallyloxyterephthalaldehyde (Da-V) via a condensation reaction, and then, fluorescent COF TzDa-V with high-crystallinity was prepared at room temperature (Fig. 2B).…”

“…One category comprises building blocks themselves with highly conjugated systems and heteroatom doping forming self-luminous fluorescent COFs. 16–18 The other category comprises functionalized fluorescent COFs resulting from the introduction of fluorophores in the backbone or side chains. 19–21 Fluorescent COFs have several irreplaceable advantages, especially the adsorption performance, over general luminescent materials, mainly due to their highly developed pore structure, which can accommodate various types of targets via specific or non-specific chemical and non-bonded interactions.…”

Water detection in organic solvents using a copolymer membrane immobilised with a fluorescent intramolecular charge transfer-type dye: effects of intramolecular hydrogen bonds

“…The response mechanism of fluorescence-based optodes containing organic fluorophores can be classified based on the fluorescence mechanism 18,19 into photo-induced electron transfer (PET), [20][21][22][23][24] intramolecular charge transfer (ICT), 21,[25][26][27][28] twisted ICT (TICT), 26,29,30 aggregation-induced emission (AIE), 24,29,30,32,33 and excited-state intramolecular proton transfer (ESIPT), 31,34,35 and so on. In addition to the organic-fluorophore-based water detectors, other luminescent inorganic and/or organic water detectors -such as graphene quantum dots, 36 carbon dots (CDs), [37][38][39][40] covalent organic frameworks (COFs), [41][42][43][44] and metal-organic frameworks (MOFs) 39,[45][46][47] have been developed over the past decade. Besides, applications, 18 such as inkless writing, 32,38 paper strips, 25,[31][32][33]35,40 and luminophore-d...…”