Click-immobilized K+-selective ionophore for potentiometric and optical sensors

Liu, Yueling; Xue, Ya-Hong; Tang, Huifen; Wang, Mi; Qin, Yu

doi:10.1016/j.snb.2012.05.033

Cited by 23 publications

(15 citation statements)

References 33 publications

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“…19 The sensing membrane cocktails (total mass 100 mg) were prepared by dissolving 0.8 wt% of Ionophores I-III, TDMACl (30, 50 or 70 mol%, relative to the ionophore), a plasticizer and PVC (mass ratio 2 : 1) in 1 mL of THF and sonicated for 30 min. 19 The sensing membrane cocktails (total mass 100 mg) were prepared by dissolving 0.8 wt% of Ionophores I-III, TDMACl (30, 50 or 70 mol%, relative to the ionophore), a plasticizer and PVC (mass ratio 2 : 1) in 1 mL of THF and sonicated for 30 min.…”

Section: Membranesmentioning

confidence: 99%

Squaramide-based tripodal ionophores for potentiometric sulfate-selective sensors with high selectivity

Liu

Qin

Jiang

2015

Analyst

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A class of squaramide-based tripodal molecules was employed as new ionophores for highly sensitive and selective sulfate-selective sensors. Compared with the reported tripodal ionophore with urea, squaramide groups as superior hydrogen bonding donor were introduced into the tripodal structure to obtain new ionophores leading to better electrode performance. Three derivatives with unsubstituted (I), p-carbon trifluoride (II), and p-nitro (III) phenyl groups were attached to squaramide groups for the optimization of ionophore based sensors. Electron withdrawing p-nitrophenyl groups gave a greater enhancement of the hydrogen bond donor ability of squaramide so that Ionophore III was chosen as the best candidate for sulfate ion recognition. Such a membrane with 30 mol% TDMACl exhibited a Nernstian slope of -30.2 mV per decade to sulfate ions with a linear range from 1 μM to 100 mM in potentiometric measurement. The selectivity coefficients of the proposed sensor over H2PO4(-), Cl(-), Br(-), NO3(-), SCN(-), I(-) and ClO4(-) were -4.3, -3.4, -2.5, -0.6, +3.1, +3.4 and +5.9, respectively, which were much better than the existing sulfate-selective sensors. The new sensors with high selectivity were successfully applied for the quantification of sulfate in cell lysates and drinking water with good recoveries.

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Section: Membranesmentioning

confidence: 99%

Squaramide-based tripodal ionophores for potentiometric sulfate-selective sensors with high selectivity

Liu

Qin

Jiang

2015

Analyst

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“…24 The biofunctionalized PANI nanofiber dendrites have been used for electrochemical immunoassay of biomarkers, 25 while in conjunction with Au nanoparticles, PANI nanofibers can also be used for sensing of sulfur compounds in human breath. 26 In addition, sensing of urea using PANI nanofibers and Pt nanoflowers has also been studied. 27 Hence, it follows that PANI nanofibers possess a wide range of potential applications.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical sensing of glucose using polyaniline nanofiber dendrites‐amperometric and impedimetric analysis

Ramya

Sangaranarayanan

2012

J of Applied Polymer Sci

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A novel electrochemical synthesis of polyaniline (PANI) nanofiber dendrites on platinum electrodes using p‐toluenesulfonic acid for sensing of glucose is reported. The characterization of PANI is carried out using scanning electron microscopy, transmission electron microscopy, Fourier transform infrared spectroscopy, and ultraviolet (UV)–visible spectral studies. The electrochemical behavior of the PANI‐coated electrode is investigated with the help of cyclic voltammetry, chronoamperometry, and impedance spectroscopy, regarding its efficacy as a glucose sensor. The amperometric analysis shows a very low detection limit of ∼100 nM with the linear regime spanning 50 µM–12 mM, while the response time is <5 s. The Michaelis–Menten constant is estimated as 1.24 × 10−2 M indicating the high activity of the glucose oxidase enzyme. The equivalent circuit fitting of the Nyquist and Bode' plots is carried out to estimate the system parameters. The reliability of the PANI coated electrodes is demonstrated by procuring the authentic samples from the hospitals. The stability and reproducibility of the sensor is also analyzed. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013

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“…It was successfully used in modifications of a wide variety of polymers 78, 79. This method was applied also for the modification of PVC in the field of ISEs, both in the bulk 38, 39, 80 and on the surface 40–42 of the membranes (Figure 5).…”

Section: Pvc Modificationmentioning

confidence: 99%

Chemical Modification of Polymer Ion‐Selective Membrane Electrode Surfaces

Pawlak

Bakker

2014

Electroanalysis

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Membrane/sample interactions play a crucial role in the biomedical application of ion selective electrodes (ISEs). Modulation of membrane surface properties can be used as a way to enhance biocompatibility and in fabrication of biosensors through biomolecules immobilization. This review discusses advances in methods and materials used for the surface modifications of polymeric ion-selective membranes in view of their applications in clinical diagnostics

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Click-immobilized K+-selective ionophore for potentiometric and optical sensors

Cited by 23 publications

References 33 publications

Squaramide-based tripodal ionophores for potentiometric sulfate-selective sensors with high selectivity

Squaramide-based tripodal ionophores for potentiometric sulfate-selective sensors with high selectivity

Electrochemical sensing of glucose using polyaniline nanofiber dendrites‐amperometric and impedimetric analysis

Chemical Modification of Polymer Ion‐Selective Membrane Electrode Surfaces

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