Voltammetry in (toluene)3-tetrabutylammonium tetrafluoroborate, a novel liquid hydrocarbon electrolyte

Fry, Albert J.; Touster, Jonathan

doi:10.1021/jo00370a033

Cited by 10 publications

(8 citation statements)

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“…Solubility problems precluded the use of the traditional conditions in obtaining a cyclic voltammogram (CV) or a differential pulse voltammogram (DPV). However, a search of less common electrochemical media revealed Bu 4 NBF 4 ·3toluene, first described by Pickett 26 and further characterized by Fry and Touster, to be suitable for this purpose. The CV and DPV of Mo 2 (hpp) 4 show two waves corresponding to reversible one-electron processes at E 1 = −0.444 V and E 2 = −1.271 V versus Ag/AgCl (Figure ).…”

Section: Resultsmentioning

confidence: 99%

“…1 H NMR spectra were recorded on a Unity Plus 300 NMR spectrometer, using CH 2 Cl 2 to reference chemical shifts (δ). Cyclic voltammetry was recorded using a BAS 100 electrochemical analyzer with a 2-mm diameter Pt disk working electrode, Ag/AgCl reference electrode, and Pt wire auxiliary electrode with Bu 4 NBF 4 ·3toluene as solvent. , The scan rate for the voltammograms was 200 mV/s. Potentials are reported versus Ag/AgCl.…”

Section: Methodsmentioning

confidence: 99%

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The Extraordinary Ability of Guanidinate Derivatives to Stabilize Higher Oxidation Numbers in Dimetal Units by Modification of Redox Potentials: Structures of Mo₂⁵⁺ and Mo₂⁶⁺ Compounds

et al. 2002

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Full characterization of the first homologous series of dimolybdenum paddlewheel compounds having electronic configurations of the types sigma(2)pi(4)delta(x), x = 2, 1, 0, and Mo-Mo bond orders of 4, 3.5, and 3, respectively, has been accomplished with the guanidinate-type ligand hpp (hpp = the anion of 1,3,4,6,7,8-hexahydro-2H-pyrimido[1,2-a]pyrimidine). Essentially quantitative oxidation of Mo(2)(hpp)(4), 1, by CH(2)Cl(2) gives Mo(2)(hpp)(4)Cl, 2. The halide in 2 can be replaced by reaction with TlBF(4) to produce Mo(2)(hpp)(4)(BF(4)), 3. Further oxidation of 2 by AgBF(4) produces Mo(2)(hpp)(4)ClBF(4), 4. The change from bond order 4 (in 1) to 3.5 in Mo(2)(hpp)(4)Cl is accompanied by an increase in the Mo-Mo bond length of 0.061 to 2.1280(4) A. A further increase of 0.044 A in the Mo-Mo distance to 2.172(1) A is observed as the bond order decreases to 3 in 4. At the same time, the Mo-N distances decrease smoothly as the oxidation state of the Mo atoms increases. Electrochemical studies have shown two chemically reversible processes at very negative potentials, E(1)(1/2)= -0.444 V and E(2)(1/2)= -1.271 V versus Ag/AgCl. These correspond to the processes Mo(2)(6+/5+) and Mo(2)(5+/4+), respectively. The latter potential is displaced by over 1.5 V relative to those of the Mo(2)(formamidinate)(4) compounds and the first one has never been observed in such complexes. Thus, in surprising contrast to previously observed behavior of the dimolybdenum unit, when it is surrounded by the very basic guanidinate ligand hpp, there is an extraordinary stabilization of the higher oxidation numbers of the molybdenum atoms.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

The Extraordinary Ability of Guanidinate Derivatives to Stabilize Higher Oxidation Numbers in Dimetal Units by Modification of Redox Potentials: Structures of Mo₂⁵⁺ and Mo₂⁶⁺ Compounds

et al. 2002

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“…The reduction potentials of the various α - substituted benzylic bromides 1 were measured by linear sweep voltammetry at a glassy carbon electrode in acetonitrile containing 0.1 M tetrabutylammonium hexafluorophosphate (TBAHFP). Potentials were measured relative to a Ag/0.1 M AgNO 3 reference electrode (Table ) . All of the benzylic bromides exhibited a sharp, highly symmetrical voltammetric peak at ca.…”

Section: Resultsmentioning

confidence: 99%

Electrochemical Formation and Dimerization of α-Substituted Benzyl Radicals. Steric Effects on Dimerization

1996

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“…According to Fray and Touster [30], TBA-TFB acts like a typical dipolar aprotic solvent to substrates dissolved in it. This can be partly explained due to the high content of salt; however, at the same time, it should also increase the degree of ion-pairing by a mass-action effect.…”

Section: Synthesis and Characterization Of Semiconductive Polymersmentioning

confidence: 99%

“…The electrochemical synthesis of polymers (which are heterocyclic-ring-containing compounds) was carried out in the TBA-TFB electrolyte solution, which acted as a mediator, and due to the architecture of the molecule, there was no need for using an additional doping agent [30]. The morphology of the modified electrodes with the silole derivatives were then investigated using atomic force microscope.…”

Section: Characterization Of Polymersmentioning

confidence: 99%

Enzymatic Platforms for Sensitive Neurotransmitter Detection

Baluta

Zając

Szyszka

et al. 2020

Sensors

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A convenient electrochemical sensing pathway was investigated for neurotransmitter detection based on newly synthesized silole derivatives and laccase/horseradish-peroxidase-modified platinum (Pt)/gold (Au) electrodes. The miniature neurotransmitter’s biosensors were designed and constructed via the immobilization of laccase in an electroactive layer of the Pt electrode coated with poly(2,6-bis(3,4-ethylenedioxythiophene)-4-methyl-4-octyl-dithienosilole) and laccase for serotonin (5-HT) detection, and a Au electrode modified with the electroconducting polymer poly(2,6-bis(selenophen-2-yl)-4-methyl-4-octyl-dithienosilole), along with horseradish peroxidase (HRP), for dopamine (DA) monitoring. These sensing arrangements utilized the catalytic oxidation of neurotransmitters to reactive quinone derivatives (the oxidation process was provided in the enzymes’ presence). Under the optimized conditions, the analytical performance demonstrated a convenient degree of sensitivity: 0.0369 and 0.0256 μA mM−1 cm−2, selectivity in a broad linear range (0.1–200) × 10−6 M) with detection limits of ≈48 and ≈73 nM (for the serotonin and dopamine biosensors, respectively). Moreover, the method was successfully applied for neurotransmitter determination in the presence of interfering compounds (ascorbic acid, L-cysteine, and uric acid).

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Voltammetry in (toluene)3-tetrabutylammonium tetrafluoroborate, a novel liquid hydrocarbon electrolyte

Cited by 10 publications

References 2 publications

The Extraordinary Ability of Guanidinate Derivatives to Stabilize Higher Oxidation Numbers in Dimetal Units by Modification of Redox Potentials: Structures of Mo₂⁵⁺ and Mo₂⁶⁺ Compounds

The Extraordinary Ability of Guanidinate Derivatives to Stabilize Higher Oxidation Numbers in Dimetal Units by Modification of Redox Potentials: Structures of Mo₂⁵⁺ and Mo₂⁶⁺ Compounds

Electrochemical Formation and Dimerization of α-Substituted Benzyl Radicals. Steric Effects on Dimerization

Enzymatic Platforms for Sensitive Neurotransmitter Detection

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Voltammetry in (toluene)3-tetrabutylammonium tetrafluoroborate, a novel liquid hydrocarbon electrolyte

Cited by 10 publications

References 2 publications

The Extraordinary Ability of Guanidinate Derivatives to Stabilize Higher Oxidation Numbers in Dimetal Units by Modification of Redox Potentials: Structures of Mo25+ and Mo26+ Compounds

The Extraordinary Ability of Guanidinate Derivatives to Stabilize Higher Oxidation Numbers in Dimetal Units by Modification of Redox Potentials: Structures of Mo25+ and Mo26+ Compounds

Electrochemical Formation and Dimerization of α-Substituted Benzyl Radicals. Steric Effects on Dimerization

Enzymatic Platforms for Sensitive Neurotransmitter Detection

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Product

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The Extraordinary Ability of Guanidinate Derivatives to Stabilize Higher Oxidation Numbers in Dimetal Units by Modification of Redox Potentials: Structures of Mo₂⁵⁺ and Mo₂⁶⁺ Compounds

The Extraordinary Ability of Guanidinate Derivatives to Stabilize Higher Oxidation Numbers in Dimetal Units by Modification of Redox Potentials: Structures of Mo₂⁵⁺ and Mo₂⁶⁺ Compounds