Hydrogen-Bonded Colorimetric and Fluorescence Chemosensor for Fluoride Anion With High Selectivity and Sensitivity: A Review

Abstract

In recent years, the wide application of fluoride materials has grown rapidly, therefore excessive discharge in the surrounding environment, especially in drinking water and organic effluent, has become a potential hazard to humans, and has even resulted in fluorosis disease. The development of a highly effective and convenient method to recognize fluoride anions in surrounding environments seems necessary and urgent. Among which, the development of a colorimetric and fluorescence fluoride chemosensor with obvious color changing allowing for naked-eye detection with high sensitivity and selectivity is more interesting and challenging. In this minireview, current novel colorimetric and fluorescence chemosensors for fluoride anions by hydrogen-bond interaction are introduced, including obvious color changing by naked-eye detection, high sensitivity and selectivity, non-pollution and fluoride extraction ability, aqueous detection, and other additional functions. Finally, the perspective of the fluoride chemosensor design concept and potential evolution trends are pointed out.

Colorimetric fluoride detection in dimethyl sulfoxide using a heteroleptic ruthenium(ii) complex with amino and amide groups: X-ray crystallographic and spectroscopic analyses

“…The bite angles of the Hdpa ligands [87. 40(19) and 89.44 (19) in the chloride salt; 87.71 (6) and 90.77 (6) in the uoride salt] were nearly identical and close to the ideal angle in octahedral complexes (90 ). However, the dihedral angles in both complexes, which are the angles between the two pyridyl groups in the Hdpa ligand, were related to ligand/ligand or NH/anion interactions.…”

“…12–14 Compounds containing NH protons, such as imidazoles, pyrazoles, amides, amino, thiourea, and urea derivatives, have been extensively used as chromogenic and fluorogenic sensors for anions, and naturally for F − anions. 1,2,13–25 This is due to the ability of the NH proton to participate in strong hydrogen-bonding interactions with F − . 16…”

“…[12][13][14] Compounds containing NH protons, such as imidazoles, pyrazoles, amides, amino, thiourea, and urea derivatives, have been extensively used as chromogenic and uorogenic sensors for anions, and naturally for F À anions. 1,2,[13][14][15][16][17][18][19][20][21][22][23][24][25] This is due to the ability of the NH proton to participate in strong hydrogenbonding interactions with F À . 16 Transition metal complexes have been used for signal modi-cation and absorption-(colorimetric) or emission-based analyses owing to their receptor-anion interactions.…”

Schiff Base Aggregation-Induced Emission Luminogens for Sensing Applications: A Review

“…It is very useful in osteoporosis and orthodontic treatments. However, too much F – can cause fluorosis, leading to an increase in bone density. − …”

FluorMango, an RNA‐Based Fluorogenic Biosensor for the Direct and Specific Detection of Fluoride

“…However, the great structural plasticity of these molecules is also the source of complex, often highly dynamic tridimensional structures that support highly complex cellular processes, including the catalysis of specific reactions or the specific recognition of molecular targets. In particular, the structural modularity and flexibility of ribonucleic acid (RNA) are exploited at A plethora of fluorogenic chemicals, for instance, exploiting the preferential reactivity of silyl or boronic groups with fluoride has also been described, [16][17][18][19] but none of these compounds is currently commercially available, and most of them have only limited compatibility with biological conditions (e.g., solubility in aqueous media), restricting their direct application for fluoride detection. Although counterintuitive at a first glance, RNA-based biosensors thus represent an attractive alternative in a biological context.…”