Anionic chromogenic chemosensors highly selective for cyanide based on the interaction of phenyl boronic acid and solvatochromic dyes

Novel chromogenic selective sensors for aqueous cyanide ions under high water content and real sample analysis

“…In many reported studies for cyanide detection, anions alone were taken in a semi aqueous medium or aqueous medium, whereas receptors were taken in pure organic medium. In some other cases, receptors had been taken in organic solvents with very little amount (1-10%) of water for increasing the selectivity for cyanide ions among other anions [14][15][16][17][18][19][20][21][22] (Table 1). To overcome this issue, we planned to design a receptor that can be soluble or solubilized by water.…”

A naphthoquinone based colorimetric probe for real-time naked eye detection of biologically important anions including cyanide ions in tap water: experimental and theoretical studies

“…In order to further understand the electronic transitions, the structures of the uncomplexed (N) and complexed (NF) sensors in gas phases were calculated on DFT method [B3LYP/6-31G**] with Spartan'14. [33][34][35][36][37][38] The calculations have indicated that there is a signicant decrease in the energy gap (HOMO-LUMO) from the uncomplexed to complexed (Table 3). The decrease in energy gap is in agreement with the characteristics of the change in spectra of N, upon complexing with F À , a bathochromic effect.…”

“…[33][34][35][36] On the other hand uoride ion has been primarily used in the dental care industry and it can be applied in osteoporosis treatment. 37,38 However, in excessive amounts it is greatly toxic to the biological tissue which can lead to uorosis and osteosclerosis and cause many serious neurodegenerative diseases. [39][40][41][42] Correspondingly, cyanide is one of the most toxic anions and the World Health Organization has set its maximum permissive level in drinking water at 1.9 mM.…”

Optical Chemosensors and Chemodosimeters for Anion Detection Based on Merrifield Resin Functionalized with Brooker’s Merocyanine Derivatives

“…Brooker’s merocyanine (BM) is a classical merocyanine which has been extensively used as a perichromic dye. − This dye has been employed in many strategies for the development of optical devices for the detection of anionic species. − The use of this system in an acid–base approach has been demonstrated, since the compound in its protonated form (BMH) is colorless in solution but can be deprotonated in the presence of basic anionic species, such as CN – or F – , in organic solvents to form the deprotonated form (BM), which is colored in solution (Scheme ). , Another strategy involves the use of BM as an indicator in displacement assays for the detection of anionic species. ,, A chemodosimeter approach can also be designed, in principle, using BM as a signaling unit, inspired by recent work reported in the literature, where the classical protection reaction was used for the silylation of phenols to yield colorless systems. In this approach, colored phenolate dyes can be generated by breaking the Si–O bond with the use of strongly nucleophilic species, such as F – or CN – . ,− …”

“…49,50 Another strategy involves the use of BM as an indicator in displacement assays for the detection of anionic species. 47,48,53 A chemodosimeter approach can also be designed, in principle, using BM as a signaling unit, inspired by recent work reported in the literature, where the classical protection reaction was used for the silylation of phenols to yield colorless systems. In this approach, colored phenolate dyes can be generated by breaking the Si−O bond with the use of strongly nucleophilic species, such as F − or CN − .…”