Optical pulse radiolysis cell and apparatus designed to study reactions in supercritical fluids
- 1 June 1995
- journal article
- Published by AIP Publishing in Review of Scientific Instruments
- Vol. 66 (6) , 3555-3559
- https://doi.org/10.1063/1.1145468
Abstract
The details of the construction of a high-pressure optical cell and flow apparatus for the study of pulse-radiolytically induced reactions in supercritical fluids are described. Application of pulse radiolysis and time-resolved absorption spectroscopy to near-critical dense gas and supercritical fluid allows for the generation and investigation of ionic transient species in these low dielectric media. Methodologies for sample preparation and pulse radiolysis of supercritical mixtures are described. Several aromatic carbocations have been generated in supercritical ethane and fluoroform and representative spectral and kinetic data are presented.Keywords
This publication has 11 references indexed in Scilit:
- Effect of Local Composition Enhancements on the Esterification of Phthalic Anhydride with Methanol in Supercritical Carbon DioxideIndustrial & Engineering Chemistry Research, 1994
- Diffusion-controlled reactions in supercritical fluoroform (CHF3) and carbon dioxide/acetonitrile mixturesJournal of the American Chemical Society, 1993
- Laser flash photolysis investigations of diffusion-controlled reactions in supercritical fluidsThe Journal of Physical Chemistry, 1993
- Transient carbocations and carbanions generated by laser flash photolysis and pulse radiolysisChemical Reviews, 1993
- Unique pressure effects on the absolute kinetics of triplet benzophenone photoreduction in supercritical carbon dioxideJournal of the American Chemical Society, 1992
- High-pressure pulse radiolysis. Modification of an optical cell for 2-MeV electron pulse radiolysis at pressures up to 200 MPaReview of Scientific Instruments, 1992
- Photo-heterolysis and -homolysis of substituted diphenylmethyl halides, acetates, and phenyl ethers in acetonitrile: characterization of diphenylmethyl cations and radicals generated by 248-nm laser flash photolysisJournal of the American Chemical Society, 1990
- Lifetimes of .alpha.-dialkoxy carbocations produced via radical cations generated by electron transfer and photoionization in aqueous solutionJournal of the American Chemical Society, 1989
- Rate constant for scavenging eaq- in nitrous oxide-saturated solutionsThe Journal of Physical Chemistry, 1982
- Fast reaction studies of carbanions and carbocations in solutionAccounts of Chemical Research, 1976