A selective chemosensor and fluorescence probe for relay recognition of cations and fluoride ions in aqueous media with logic gate function

Lanthanide Luminescence to Mimic Molecular Logic and Computing through Physical Inputs

“…[1] Basic logical gates were the first generation of logic devices in the 2000s. [2,3,7,[11][12][13][14][15][16][17] Interrogating the molecules with ionic species, their optical properties were changed, [17][18][19] giving a TRUE or FALSE logical output (logical outputs 1 and 0), and thus elementary Boolean functions were performed. Later on, it was recognized that the molecules can additionally perform logical operations of higher complexity, such as molecular multiplexers and demultiplexers or molecular binary adders and subtractors [18,[20][21][22][23][24][25] All the above-mentioned molecular devices operate in wet conditions, so its immediate use was in biomedicine.…”

Highly Specific Colorimetric Probe for Fluoride by Triggering the Intrinsic Catalytic Activity of a AgPt–Fe3O4 Hybrid Nanozyme Encapsulated in SiO2 Shells

“…9−11 To overcome these limitations, colorimetric methods based on organic dyes with delocalized conjugated functional groups are often employed as chromogenic reagents for the detection of F − . Most of these organic probes were designed based on hydrogenbonding interactions, 12,13 anion−π interactions, 14 Lewis acid coordination, 15 and desilylation of Si−O/Si−C bonds. 16 For instance, Elango et al synthesized amino-naphthoquinone for selective sensing of F − in N,N-dimethylformamide (DMF) through the formation of a hydrogen-bond between the N−H moiety and F − .…”

“…Traditional methods for detecting F – , including ion-selective electrodes, atomic fluorescence spectroscopy, ion chromatography, inductively coupled plasma-atomic emission spectrometry, and high-performance liquid chromatography, typically require complex sample pretreatment, cost-prohibitive instruments, well-trained technicians, or a long turnaround time. − To overcome these limitations, colorimetric methods based on organic dyes with delocalized conjugated functional groups are often employed as chromogenic reagents for the detection of F – . Most of these organic probes were designed based on hydrogen-bonding interactions, , anion−π interactions, Lewis acid coordination, and desilylation of Si–O/Si–C bonds . For instance, Elango et al synthesized amino-naphthoquinone for selective sensing of F – in N , N -dimethylformamide (DMF) through the formation of a hydrogen-bond between the N–H moiety and F – .…”

Near-Infrared Turn-On Fluorescent Probe for Aqueous Fluoride Ion Detection and Cell Imaging

“…Therefore, the development of a simple and highly sensitive method for F – detection is still urgently needed. Compared with other analytical methods, fluorescence detection technology has attracted great attention as it has been proved to have simple techniques, cost-efficient experiments, high sensitivities, and selectivity and can also be applied to live cell imaging of anions. − Recently, several organic molecules have been reported as fluorescent probes for the detection of F – . − These probes are based on the hydrogen bond mechanism where the O–H or N–H group is protonated or bonded under the action of fluorine, resulting in the change of molecular spectrum properties. However, since F – is the most electronegative anion, it can also readily form hydrogen bonds with water molecules, which severely limits the detection of F – in aqueous systems by hydrogen-bonded fluorescent probes.…”