Ion pair formation between electro-generated 1,2-naphtoquinone anion radicals and alkali metal cations in acetonitrile.
スポンサーリンク
概要
- 論文の詳細を見る
Ion association of 1,2-naphthosemiquinone with the alkali metal cations in acetonitrile has been comprehensively studied by the use of ESR, absorption spectroscopy, polarography and with MO calculation. A continuous flow electrolysis system with a glassy carbon column electrode has been developed for the rapid quantitative preparation of organic free radicals, whose ESR spectrum or absorption spectrum was observed <I>in situ</I>. The formation constants of the ion pair with K<SUP>+</SUP>, Na<SUP>+</SUP>, and Li<SUP>+</SUP> were estimated as 10<SUP>3.2</SUP>, 10<SUP>4.5</SUP>, and 10<SUP>8.0</SUP>, respectively. By the addition of alkali metal cations, the half-wave potentials shifted to more positive potential in the order of K<SUP>+</SUP><Na<SUP>+</SUP><Li<SUP>+</SUP>. The proton hyperfine splitting constants in the ESR also varied in this order. This column electrolysis method is considered to be a powerful technique, particularly for the study of short lived free radicals, because the quantitative electrolysis is performed rapidly even in a solution of extremely diluted supporting electrolyte, such as 0.1 mM (mmol/dm<SUP>3</SUP>).
- 公益社団法人 日本化学会の論文
著者
-
Okazaki Satoshi
Department Of Applied Chemistry Kyushu Institute Of Technology
-
Fujinaga Taitiro
Department Of Chemistry Faculty Of Science Kyoto University
-
Nagaoka Tsutomu
Department Of Applied Chemistry Faculty Of Engineering Yamaguchi University
-
Nagaoka Tsutomu
Department of Chemistry, Faculty of Science, Kyoto University
関連論文
- ナノ集積型微小電極を用いたペリレン二量体カチオンラジカル過塩素酸塩の析出過程およびその電気化学的発光反応の解析
- Electrochemical and Spectroelectrochemical Characterization of Some Polypyrrole/Anthraquinone Sulfonate Films
- Self-Assembled Monolayer-Based Electrodes for Selective Determination of Cu^ and Ag^+ Ions with Antifouling Activity against Protein Adsorption
- Near Field Stimulated Time of Flight Mass Surface Analyzer
- Selective Determination of Tryptophan by Using a Carbon Paste Electrode Modified with an Overoxidized Polypyrrole Film
- Stability and Telomere Structure of Chromosomal Fragments in Two Different Mosaic Strains of the Silkworm, Bombyx mori.(Genetics)
- Separation of Solid Particles by Density Difference in a Liquid-Solid Fluidized Bed
- Overoxidized Polypyrrole with Dopant Complementary Cavities as a New Molecularly Imprinted Polymer Matrix
- Ion-Exchange Ability of Polyaniline-Polyvinyl Alcohol Colloids with Various Anions
- Preparation of Soluble Polyaniline and Its Voltammetric Behavior for Ion Exchange
- Retention Characteristics in Supercritical Fluid Chromatography and Comparison with Gas Chromatography
- ACID-BASE EQUILIBRIA IN ACETYLACETONE: DISSOCIATION OF SOME WEAK ACIDS AND THE AUTOPROTOLYSIS CONSTANT OF THE SOLVENT
- Vertical Immobilization of Viable Bacilliform Bacteria into Polypyrrole Films
- Development of an Electrochemical Cholesterol Sensor System for Food Analysis
- Electron Spin Resonance Spectra of Nitrophenol Anion Radicals
- Kinetic studies on the reactions of electrogenerated 9,10-diphenylanthracene cation radical with water and alcohols by means of column-electrolytic stopped-flow method.
- Polarographic Investigation of Dissolved Oxygen in Nonaqueous Solvent
- Polarographic Reductions of Some Alkali and Alkaline Earth Metal Ions in Dimethylacetamide. Effect of Cation of the Supporting Electrolyte
- The polarographic reduction of various ammonium cations in hexamethylphosphoric triamide.
- Polarographic determination of bismuth, copper, iron(III), palladium, and uranium(VI) after extraction into molten naphthalene with oxine.
- Resonance Raman spectroscopic studies of electrogenerated cation radicals by column-electrolytic continuous-flow method.
- Direct determination of hyperfine coupling constants from complex and poorly resolved ESR spectra with numerical decoupling analysis.
- On the enhancement of the selectivity of organic sulfonate ion electrode by alkylphenols.
- Studies of lead-complex formation in sea water by anodic stripping methods.
- Ion pair formation between electro-generated 1,2-naphtoquinone anion radicals and alkali metal cations in acetonitrile.
- Electrochemical reduction of elemental sulfur in acetonitrile.
- Effect of molecular size on the association of p-quinone anion and lithium ion in N,N-dimethylformamide.
- A wittig-type reaction of phosphoranes with carbon monoxide coordinated to palladium. A synthetic route to isocyanide palladium complexes.
- An evaluation of ion-exchange membrane electrodes.
- Polarographic Investigation of Alkali Metal Ions in Hexamethylphosphoramide
- Synergistic effect of nitrogen neutral bases in the solvent extraction of zinc(II) and cadmium(II) diphenylcarbazonates.
- Preparation and analytical evaluation of liquid membrane electrodes based on solid-solvents.
- Placement of Nanospace on an Electrode for Biosensing