Water-Free Proton-Conducting Polysiloxanes:  A Study on the Effect of Heterocycle Structure

Granados-Fócil, Sergio; Woudenberg, Richard C.; Yavuzçetin, Özgür; Tuominen, Mark; Coughlin, E. Bryan

doi:10.1021/ma071715q

Cited by 63 publications

(64 citation statements)

References 30 publications

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“…The resulting polymers showed the highest reported proton conductivities of up to 0.1 mS/cm at temperatures below 80 • C and up to 5 mS/cm at 180 • C when doped with trifluoroacetic acid [20].…”

Section: Conductivity Measurementmentioning

confidence: 99%

Intrinsically proton-conducting poly(1-vinyl-1,2,4-triazole)/triflic acid blends

Aslan

Çelik

Şen

et al. 2009

Electrochimica Acta

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Section: Conductivity Measurementmentioning

confidence: 99%

Intrinsically proton-conducting poly(1-vinyl-1,2,4-triazole)/triflic acid blends

Aslan

Çelik

Şen

et al. 2009

Electrochimica Acta

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“…The polymer membranes based on acid-doped triazole functional polymers would be interesting where high conductivity can be obtained even at lower dopant ratios [10,11]. The presence of three nitrogens in the ring may enhance long range proton diffusion, which can be far better than imidazole based host polymer, i.e., poly(4(5)-vinyl-imidazole) [12].…”

Section: Introductionmentioning

confidence: 99%

Proton conducting composite membranes based on poly(1-vinyl-1,2,4-triazole) and nitrilotri (methyl triphosphonic acid)

Gustian

Çelik

Suratno

et al. 2011

Journal of Physics and Chemistry of Solids

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a b s t r a c tPolymer electrolyte composite membranes based on poly(1-vinyl-1,2,4-triazole) (PVTRI) and nitrilotri(methyl triphosphonic acid) (TPA) were investigated. PVTRI was produced by free radical polymerization of 1-vinyl-1,2,4-triazole. The polymer PVTRI was doped with TPA at various molar ratios x ¼ 0.125, x ¼ 0.25, and x ¼ 0.5. The proton transfer from TPA to the triazole rings was proved with Fourier-transform infrared spectroscopy (FT-IR). Thermogravimetry (TG) analysis showed that the samples are thermally stable up to approximately 250 1C. DSC results illustrated the homogeneity of the materials as well as the softening effect of the dopant. Cyclic voltammetry results illustrated that the electrochemical stability domain of the dopant extends over 1.5 V. The maximum proton conductivity has been measured for PVTRITPA-0.25 as 8.5 Â 10 À 4 S cm À 1 at 150 1C.

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“…[27][28][29] Their purity was confirmed by comparing the 13 C-NMR spectra to data published in the literature for the non-polymeric compounds and by 1 H-NMR for the copolymers. Experimental details are described in the supplemental information.…”

Section: Polyionic Liquid Synthesismentioning

confidence: 99%

Simple, Robust, and Plasticizer-Free Iodide-Selective Sensor Based on Copolymerized Triazole-Based Ionic Liquid

Mendecki

Chen

Callan³

et al. 2016

Anal. Chem.

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Novel solid contact iodide selective electrodes based on covalently attached 1,2,3 triazole ionic liquid (IL) were prepared and investigated in this study. Triazole-based IL moieties were synthesized using click chemistry and were further copolymerized with lauryl methacrylate via a simple one step free radical polymerization to produce a "self-plasticized" copolymer. The mechanical properties of the copolymer are suitable for the fabrication of plasticizer-free ion-selective membrane electrodes. We demonstrate that covalently attached IL moieties provide adequate functionality to the ion selective membrane thus achieving a very simple, one component sensing membrane. We also demonstrate the presence of iodide as the counter-ion in the triazole moiety has direct influence on membrane's functionality. Potentiometric experiments revealed that each electrode displays high selectivity towards iodide anions over a number of inorganic anions. Moreover the inherent presence of the iodide in the membrane reduces the need for conditioning. The non-conditioned electrodes show strikingly similar response characteristics compared to the conditioned ones. The electrodes exhibited a near Nernstian behavior with a slope of -56.1 mV per decade across large concentration range with lower detection limits found at approximately 6.3x10 -8 M or 8 ppb . These all-solid state sensors were utilized for the selective potentiometric determination of iodide ions in artificial urine samples in the nanomolar concentration range.Potentiometric chemical sensors, with primary responses based on extraction and molecular recognition processes are a wellstudied and understood class of sensing devices. 1 Ion selective electrodes (ISEs) have been already widely used in a variety of fields such as clinical analysis, 2 process control 3 and environmental monitoring. 4 Ion selective membranes are typically composed of plasticized polymers, ion exchange salts, and one or more ionophores. Each constituent plays a specific role in the proper functioning of these membrane based ISEs. 5 Spontaneous and non-specific extraction of analyte ions from the sample into the membrane bulk is primarily suppressed due to the highly hydrophobic nature of the polymer backbone. Ideally, polymer matrix should provide a homogenous medium in which all active components can move freely. This strongly resembles the composition of liquid membrane electrodes since their sensing components were simply dissolved in an organic medium. However, the performance of polymer-based membranes can be drastically reduced if such sensors are used for the measurements of ions within more lipophilic environments in biological samples including undiluted whole blood. The cross contamination of chemical sensors coupled with leaching of the sensing components from the ion selective membrane into the sample fundamentally limited the applications of ISEs as a robust analytical tool for long-term trace level analysis. 6 Over the years, a number of approaches have been developed to minim...

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Water-Free Proton-Conducting Polysiloxanes: A Study on the Effect of Heterocycle Structure

Cited by 63 publications

References 30 publications

Intrinsically proton-conducting poly(1-vinyl-1,2,4-triazole)/triflic acid blends

Intrinsically proton-conducting poly(1-vinyl-1,2,4-triazole)/triflic acid blends

Proton conducting composite membranes based on poly(1-vinyl-1,2,4-triazole) and nitrilotri (methyl triphosphonic acid)

Simple, Robust, and Plasticizer-Free Iodide-Selective Sensor Based on Copolymerized Triazole-Based Ionic Liquid

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