A Unique Feature of Ionic Diffusion-Controlled Reactions in Supercritical Fluid

Toshihiko Arita; Okitsugu Kajimoto

doi:10.4131/jshpreview.14.37

A Unique Feature of Ionic Diffusion-Controlled Reactions in Supercritical Fluid

Research output: Contribution to journal › Review article › peer-review

Abstract

Density dependence of the rate constants of diffusion-controlled ionic recombination reactions in supercritical (SC) fluoroform was investigated to explore the effect of the local density enhancement on diffusion-controlled reactions. For the ionic recombination, the effect was clearly detected as strong retardation of reaction rate near the critical density. On the other hand, for the radical self-termination, the effect was not detected. This difference must be due to the strong solute-solvent interaction between ionic species and solvent molecules. The local density around the charged molecules should be drastically enhanced by Coulomb interactions.

Original language	English
Pages (from-to)	37-44
Number of pages	8
Journal	Review of High Pressure Science and Technology/Koatsuryoku No Kagaku To Gijutsu
Volume	14
Issue number	1
DOIs	https://doi.org/10.4131/jshpreview.14.37
Publication status	Published - 2004
Externally published	Yes

Keywords

Clustering
Dielectric constant
Diffusion-controlled reaction
Ionic recombination
Laser flash photolysis
Local density enhancement
Radical self-termination
Supercritical fluid
Viscosity

ASJC Scopus subject areas

Chemistry(all)
Materials Science(all)
Condensed Matter Physics

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10.4131/jshpreview.14.37

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title = "A Unique Feature of Ionic Diffusion-Controlled Reactions in Supercritical Fluid",

abstract = "Density dependence of the rate constants of diffusion-controlled ionic recombination reactions in supercritical (SC) fluoroform was investigated to explore the effect of the local density enhancement on diffusion-controlled reactions. For the ionic recombination, the effect was clearly detected as strong retardation of reaction rate near the critical density. On the other hand, for the radical self-termination, the effect was not detected. This difference must be due to the strong solute-solvent interaction between ionic species and solvent molecules. The local density around the charged molecules should be drastically enhanced by Coulomb interactions.",

keywords = "Clustering, Dielectric constant, Diffusion-controlled reaction, Ionic recombination, Laser flash photolysis, Local density enhancement, Radical self-termination, Supercritical fluid, Viscosity",

author = "Toshihiko Arita and Okitsugu Kajimoto",

year = "2004",

doi = "10.4131/jshpreview.14.37",

language = "English",

volume = "14",

pages = "37--44",

journal = "Review of High Pressure Science and Technology/Koatsuryoku No Kagaku To Gijutsu",

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T1 - A Unique Feature of Ionic Diffusion-Controlled Reactions in Supercritical Fluid

AU - Arita, Toshihiko

AU - Kajimoto, Okitsugu

PY - 2004

Y1 - 2004

N2 - Density dependence of the rate constants of diffusion-controlled ionic recombination reactions in supercritical (SC) fluoroform was investigated to explore the effect of the local density enhancement on diffusion-controlled reactions. For the ionic recombination, the effect was clearly detected as strong retardation of reaction rate near the critical density. On the other hand, for the radical self-termination, the effect was not detected. This difference must be due to the strong solute-solvent interaction between ionic species and solvent molecules. The local density around the charged molecules should be drastically enhanced by Coulomb interactions.

AB - Density dependence of the rate constants of diffusion-controlled ionic recombination reactions in supercritical (SC) fluoroform was investigated to explore the effect of the local density enhancement on diffusion-controlled reactions. For the ionic recombination, the effect was clearly detected as strong retardation of reaction rate near the critical density. On the other hand, for the radical self-termination, the effect was not detected. This difference must be due to the strong solute-solvent interaction between ionic species and solvent molecules. The local density around the charged molecules should be drastically enhanced by Coulomb interactions.

KW - Clustering

KW - Dielectric constant

KW - Diffusion-controlled reaction

KW - Ionic recombination

KW - Laser flash photolysis

KW - Local density enhancement

KW - Radical self-termination

KW - Supercritical fluid

KW - Viscosity

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DO - 10.4131/jshpreview.14.37

M3 - Review article

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VL - 14

SP - 37

EP - 44

JO - Review of High Pressure Science and Technology/Koatsuryoku No Kagaku To Gijutsu

JF - Review of High Pressure Science and Technology/Koatsuryoku No Kagaku To Gijutsu

SN - 0917-639X

IS - 1

ER -

A Unique Feature of Ionic Diffusion-Controlled Reactions in Supercritical Fluid

Abstract

Keywords

ASJC Scopus subject areas

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