Chemodosimeters for optical detection of fluoride anion

Chemodosimeters - the reaction based sensing systems for F- ions provide the significantly higher selectivity due to specificity of their reactions and also better opportunities for analysis in aqueous environment as these are independent of hydrogen bonding interactions in comparison to those of chemosensors. In the present review, the literature appeared between years 2012-2018 has been comprehensively presented for chemodosimeters based on the selective interactions of F- ion towards silicon, boron, phosphorous, antimony centers in variety of fluorophores. Also, the chemodosimeters undergoing displacement of an organic fluorophore or water molecule present on the metal center with that of F- ion or displacement of metal ion from the fluorophore resulting in optical changes have been discussed separately. These fluorophores result in highly selective change in their optical (fluorescence, absorbance, chemiluminescence) behaviour only with F- ion and so the discussion on other anions has been limited to the cases where they significantly interfere in analysis of F- ion. During these discussions, the attention has been also given to the source of F- ion from inorganic salts (NaF/KF/CsF) or to organic salts like tetra (n-butyl)ammonium fluoride. The review covers 280 references. (C) 2019 Elsevier B.V. All rights reserved.