New optical cell design for laser flash photolysis studies in supercritical fluids
- Department of Chemistry, University of Utah, Salt Lake City, Utah 84112 (United States)
- Department of Chemistry, Brigham Young University, Provo, Utah 84602 (United States)
A high-pressure optical cell has been designed that achieves an effective separation between the chemical sample and the pressurizing medium and system. This design limits possible sample contamination and catalytic effects under supercritical fluid sample conditions. Laser flash photolysis experiments were carried out on molybdenum hexacarbonyl dissolved in supercritical CO{sub 2}. The thermal ring closure reaction of the species Mo(CO){sub 5}L, where L is 2,2{prime}-bipyridine was found to proceed at rates comparable to those measured previously in liquid benzene or toluene. Much larger activation volumes were found for the reaction in supercritical CO{sub 2} than in liquid toluene. {copyright} {ital 1995} {ital American} {ital Institute} {ital of} {ital Physics}.
- OSTI ID:
- 164988
- Journal Information:
- Review of Scientific Instruments, Vol. 66, Issue 1; Other Information: PBD: Jan 1995
- Country of Publication:
- United States
- Language:
- English
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