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Acetonitrile

About: Acetonitrile is a research topic. Over the lifetime, 11298 publications have been published within this topic receiving 175275 citations. The topic is also known as: cyanomethane & ethyl nitrile.


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TL;DR: In this paper, the authors used cyclic voltammetry (CV), UV−visible (UV−vis), circular dichroism (CD), and resonance Raman (λex = 406.7, 413.1 nm) spectroscopy to probe the structure and redox function of horse cytochrome c (cyt c) in aqueous mixtures of three water-miscible organic solvents, specifically, acetonitrile (ACN), dimethylformamide (DMF), and dimethyl sulfoxide (DMSO) containing 100
Abstract: Cyclic voltammetry (CV), UV−visible (UV−vis), circular dichroism (CD), and resonance Raman (λex = 406.7, 413.1 nm) spectroscopy have been used to probe the structure and redox function of horse cytochrome c (cyt c) in aqueous mixtures of three water-miscible organic solvents, specifically, acetonitrile (ACN), dimethylformamide (DMF), and dimethyl sulfoxide (DMSO) containing 100−60% water. As the concentration of the organic solvent is increased, significant changes are observed in the spectroscopy of ferricytochrome c (ferricyt c) with the greatest structural changes observed for ferricyt c in mixed solvent media with the lowest dielectric constant (30% ACN in this work). In the UV−visible spectrum, the Soret band blue shifts (1 nm) and the intensity of the 695 nm band decreases. UV CD (185−240 nm) suggest that changes in the protein secondary structure on going from aqueous to nonaqueous media are relatively small and that the protein structure remains largely intact in nonaqueous media. In the visible C...

79 citations

Journal ArticleDOI
TL;DR: In this paper, the effects of using different sources of precursor poly(ethylene oxide) and acetonitrile solvent on the physical and electrochemical properties of lithium salt-PEO polymer electrolytes were investigated.

79 citations

Journal ArticleDOI
TL;DR: By use of the technique of laser flash photolysis, rate constants k(RNH 2 ) have been directly measured for the reactions of primary amines RCH 2 NH 2 with diarylmethyl cations (D + ) in acetonitrile/water solutions as discussed by the authors.
Abstract: By use of the technique of laser flash photolysis, rate constants k(RNH 2 ) have been directly measured for the reactions of primary amines RCH 2 NH 2 (R=CH 3 CH 2 , CH 3 OCH 2 , NCCH 2 , CF 3 ) with diarylmethyl cations (D + ) in acetonitrile/water solutions

79 citations

Journal ArticleDOI
TL;DR: In this paper, the molybdenum-oxo complex (MoO) was used to reduce protons at a glassy carbon electrode in acidic organic media, where the active catalyst was shown to be diffusing freely in solution.
Abstract: We recently reported the catalytic generation of hydrogen from water mediated through the in situ reduction of the molybdenum(IV)–oxo complex [(PY5Me2)MoO]2+ (1; PY5Me2 = 2,6-bis(1,1-bis(2-pyridyl)ethyl)pyridine) at a mercury electrode. To gain further insight into this unique molecular motif for hydrogen production, we have now examined the competence of this complex for the catalytic reduction of protons on an alternative electrode material. Herein, we demonstrate the ability of the molybdenum–oxo complex 1 to reduce protons at a glassy carbon electrode in acidic organic media, where the active catalyst is shown to be diffusing freely in solution. Cyclic and rotating disk voltammetry experiments reveal that three reductive electrochemical processes precede the catalytic generation of hydrogen, which occurs at potentials more negative than −1.25 V vs. SHE. Gas chromatographic analysis of the bulk electrolysis cell headspace confirms that hydrogen is generated at a Faradaic efficiency of 99%. Under pseudo-first order conditions with an acid-to-catalyst ratio of >290, a rate constant of 385 s−1 is calculated for the reduction of acetic acid in acetonitrile. Taken together, these data show that metal–oxo complex 1 is a competent molecular motif for catalytic generation of hydrogen from protons under soluble and diffusion-limited conditions.

79 citations

Journal ArticleDOI
TL;DR: In this paper, an innovative synthesis route for hydrophobic ionic liquids (ILs) composed of N-methyl-N-alkylpyrrolidinium or imidazolium or tetralkylammonium cations and (perfluoroalkylsulfonyl)imide was described.

79 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023533
20221,074
2021178
2020172
2019229
2018207