Nonequilibrium Processes During Fe(CO)5 Pyrolysis in a Shock Wave
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J. Deppe
In this work the processes of nonequilibrium radiation and ionization in the weak shock waves (2 < M < 4) in argon or helium, containing a small admixture (0.1–2%) of Fe(CO)5 are experimentally studied. The spectra- and time-resolved measurements, performed using a ICCD camera (StreakStar II, LaVision GmbH) have shown, that the unresolved radiation spectra are situated in the range 400–700 nm. The maximum of the spectra lies approximately at 615 nm. The radiation appeared immediately at the propagating shock front and lasted about 8–12 μs. The following time-resolved measurements, performed using photomultipliers (at 615 ± 10 nm) and calibrated electric probes have shown intensive peaks of emission and electric current with duration of few μs, that correlates with the characteristic time of active growth of iron clusters. The analysis of the results obtained allowed to conclude that the real mechanism of generation of the observed peaks of radiation and ionization is the instant dissociation of Fe(CO)5 causing an active condensation process of a supersaturated vapor of iron atoms, which results in the formation of excited and ionized iron clusters.
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- Electrowetting of Ionic Liquids under High Vacuum Conditions
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Artikel in diesem Heft
- Sensitive Absorption Methods for Quantitative Gas Phase Kinetic Measurements. Part 1: Frequency Modulation Spectroscopy
- Sensitive Absorption Methods for Quantitative Gas Phase Kinetic Measurements. Part 2: Cavity Ringdown Spectroscopy
- Conductivity Studies of n-Tetrabutylammonium Tetraphenylborate in Acetone and Acetonitrile in the Temperature Range from 283.15 to 303.15K
- Chemical Changes of Evaporated a-C Films upon UV Ashing, Hydration, and Drying
- Nonequilibrium Processes During Fe(CO)5 Pyrolysis in a Shock Wave
- Electrowetting of Ionic Liquids under High Vacuum Conditions
- Comparison of a VOx-TiO2 and a VOx/SbOy-TiO2 Industrial Catalyst in the Oxidative Scission of Methyl Ethyl Ketone and 2-Butanol to Acetic Acid
- Characterization of Water-Soluble Cucurbit[7]uril in Alcohol-Water Mixtures by High-Pressure Studies on the Inclusion Complexation with New Methylene Blue
- Electronic States of the Ultramarine Chromophore S3-
- Effect of Sodium Sulphate on the Volumetric, Rheological and Refractometric Properties of some Disaccharides in Aqueous Solutions at Different Temperatures
- Kinetics of Protein Adsorption at a Poly(Acrylic Acid) Brush Studied by Surface Plasmon Resonance Spectroscopy
- Book Review
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