An acoustic wave sensor for the hydrophilic fluoride

Valente, Nuno I.P.; Muteto, Paulino V.; Farinha, Andreia S.F.; Tomé, Augusto C.; Oliveira, João A.B.P.; Gomes, M. Teresa S.R.

doi:10.1016/j.snb.2011.05.028

Cited by 12 publications

(3 citation statements)

References 34 publications

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“…As shown in Table 1 , the capacitance of the FS-SAM is larger in hydrophilic Cl − [ 30 ] and F − [ 31 ] solution than that in hydrophobic ClO 4 − [ 32 ] and PF 6 − [ 30 ] solution. The largest and the least film capacitance was obtained in the Cl − and PF 6 − solutions, respectively.…”

Section: Resultsmentioning

confidence: 99%

Electrochemistry Study of Permselectivity and Interfacial Electron Transfers of a Branch-Tailed Fluorosurfactant Self-Assembled Monolayer on Gold

Luo

Zhang

et al. 2018

Molecules

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We investigated the permselectivity and interfacial electron transfers of an amphiphilic branch-tailed fluorosurfactant self-assembled monolayer (FS-SAM) on a gold electrode by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The FS-SAM was prepared by a self-assembly technique and a “click” reaction. The barrier property and interfacial electron transfers of the FS-SAM were also evaluated using various probes with different features. The FS-SAM allowed a higher degree of permeation by small hydrophilic (Cl− and F−) electrolyte ions than large hydrophobic (ClO4− and PF6−) ones. Meanwhile, the redox reaction of the Fe(CN)63− couple was nearly completely blocked by the FS-SAM, whereas the electron transfer of Ru(NH3)63+ was easier than that of Fe(CN)63−, which may be due to the underlying tunneling mechanism. For hydrophobic dopamine, the hydrophobic bonding between the FS-SAM exterior fluoroalkyl moieties and the hydrophobic probes, as well as the hydration resistance from the interior hydration shell around the oligo (ethylene glycol) moieties, hindered the transport of hydrophobic probes into the FS-SAM. These results may have profound implications for understanding the permselectivity and electron transfers of amphiphilic surfaces consisting of molecules containing aromatic groups and branch-tailed fluorosurfactants in their structures.

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Section: Resultsmentioning

confidence: 99%

Electrochemistry Study of Permselectivity and Interfacial Electron Transfers of a Branch-Tailed Fluorosurfactant Self-Assembled Monolayer on Gold

Luo

Zhang

et al. 2018

Molecules

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“…[5], [6]. But in comparison to these bulky, high cost [7] methods many other relatively simpler works have also been carried out to enable colorimetric i.e. naked eye detection of fluoride ion in different solvents.…”

Section: Introductionmentioning

confidence: 99%

Chemically Tapered Multimode Optical Fiber Probe for Fluoride Detection Based on Fluorescence Quenching of Curcumin

et al. 2015

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The present work reports a simple fluorescence based tapered fiber optic probe for fluoride ion having a detection range of 2.08 × 10 -6 -2.005×10 -4 M. The performance of the tapered probe is evaluated with respect to probes that consist of combinations of bare un-cladded multimode optical fibers. The effect of fluorescence quenching of a natural dye Curcumin in the presence of fluoride ion is used in the implementation of the probes. The probe effectively uses multiple mechanisms for the excitation and collection of fluorescence from the medium enabling higher sensitivity compared to conventional spectrophotometry especially at very low concentrations of fluoride.

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“…In order to test the ability of receptors 1-3 to interact with anions in aqueous solutions, piezoelectric quartz crystal gold electrodes coated with each Por were prepared. 15 This coating was made possible by the fact that Pors 1-3 are insoluble in water and chemically stable on the laboratory time scale, both in solution and when coated on a gold surface. Tests for anion recognition capability and selectivity were carried out as follows: aqueous solutions of the sodium salts of various anions (10 À1 to 5 Â 10 À3 M) at pH 9.7 were injected into a water stream adjusted to the same pH.…”

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confidence: 99%

New porphyrin derivatives for phosphate anion sensing in both organic and aqueous media

et al. 2014

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New porphyrin-based anion receptors have been prepared from meso-tetrakis(pentafluorophenyl)porphyrin () and diamine derivatives. These receptors (compounds ) interact preferentially with phosphate anions both in organic solutions and in basic aqueous media when coated on gold piezoelectric quartz crystals. A single crystal X-ray structure of the bis-HF complex of a imine derivative of was obtained; it serves to highlight the main interactions between the anion and cation receptors in the solid state.

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An acoustic wave sensor for the hydrophilic fluoride

Cited by 12 publications

References 34 publications

Electrochemistry Study of Permselectivity and Interfacial Electron Transfers of a Branch-Tailed Fluorosurfactant Self-Assembled Monolayer on Gold

Electrochemistry Study of Permselectivity and Interfacial Electron Transfers of a Branch-Tailed Fluorosurfactant Self-Assembled Monolayer on Gold

Chemically Tapered Multimode Optical Fiber Probe for Fluoride Detection Based on Fluorescence Quenching of Curcumin

New porphyrin derivatives for phosphate anion sensing in both organic and aqueous media

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