A water-soluble fluorescent sensor for the quick discrimination of H₂O and D₂O by notable signal outputs and the real-time monitoring of food spoilage in a non-contact mode

Abstract

Due to the very similar chemical and physical properties, D2O and H2O cannot be discriminated easily by convenient and cost-effective way. Up to now, small organic molecules with active deprotonating...

Aromatic fluorine atom-induced highly amine-sensitive trimethine cyanine dye showing colorimetric and ratiometric fluorescence change

“…[1][2][3][4] Amines could cause serious damage in public health and the environment owing to their toxic nature, so, simple, fast, lowcost, and accurate amine monitoring systems are becoming highly urgent. 5 The detection of amines using ratiometric uorescence through utilized intramolecular charge transfer (ICT), [6][7][8][9][10][11][12][13][14][15][16][17] twisted ICT, 18 aggregation-induced emission, [19][20][21][22][23] and excited state intramolecular proton transfer 24 has been reported.…”

Modulating Dual Fluorescence Emissions in Imine-Based Probes to Distinguish D2O and H2O

“…These reported sensing systems are also summarized in Table S1. Not only these limited systems raise a requirement to enrich the types of designing spectral probes but also quite a few examples show a ratiometric fluorescence way to distinguish D 2 O and H 2 O , featured by the appearance of two emissions, responsible for D 2 O and H 2 O. This feature is crucial to develop the sensing system for distinguishing D 2 O and H 2 O.…”

“…The spectral difference was due to the complexing with D 2 O/H 2 O and Eu 3+ ions, leading to the slightly different quenching efficacies between O-D and O-H oscillators with respect to the excited state of the Eu 3+ ions. Next, they further designed a fluorescence probe bearing carboxylic acid group(s) to discriminate D 2 O and H 2 O due to pH-dependent deprotonation of the carboxylic acid . Another example for using inorganic materials as a fluorescence sensing system to detect H 2 O content in D 2 O is Bohidar et al’s work in which CuInGaSe nanocrystals were applied .…”

“…Next, they further designed a fluorescence probe bearing carboxylic acid group(s) to discriminate D 2 O and H 2 O due to pH-dependent deprotonation of the carboxylic acid. 18 Another example for using inorganic materials as a fluorescence sensing system to detect H 2 O content in D 2 O is Bohidar et al's work in which CuInGaSe nanocrystals were applied. 19 An intriguing example using organic small molecules as fluoresence sensors to identify D 2 O and H 2 O was reported by Lu's group.…”

A water-soluble sensor for distinguishing D2O from H2O by dual-channel absorption/fluorescence ratiometry

“…Encouragingly, in 2020 and 2022, Lin 13 and Ma 14 developed two D 2 O optical sensors with significantly improved water-solubility, i.e. , CF-D 2 O and TPA-DP-COOH , respectively.…”