Gas-phase chemistry of Mo, Ru, W, and Os metal carbonyl complexes
-
Y. Wang
,
F.-L. Fan
Abstract
Metal carbonyl complexes were used for studying the gas-phase chemical behavior of Mo, Ru, W and Os isotopes with an on-line low temperature isothermal gas chromatography apparatus. Short-lived Mo and Ru isotopes were produced by a 252Cf spontaneous fission source. Short-lived nuclides of W and Os were produced using the heavy ion reactions 19F +159Tb and 165Ho, respectively. Short-lived products were thermalized in a recoil chamber filled with a gas mixture of helium and carbon monoxide. The carbonyls formed were then transported through capillaries to an isothermal chromatography column for study of the adsorption behavior as a function of temperature. On-line isothermal chromatography (IC) experiments on Teflon (PTFE) and quartz surfaces showed that short-lived isotopes of the listed elements can form carbonyl complexes which are very volatile and interact most likely in physical sorption processes. Deduced adsorption enthalpies of Mo and Ru carbonyls were − 38 ± 2 kJ/mol and − 36 ± 2 kJ/mol, respectively. These values are in good agreement with literature data, partly obtained with different chromatographic techniques. A validation of the applied Monte Carlo model to deduce adsorption enthalpies with Mo isotopes of different half-lives proved the validity of the underlying adsorption model. The investigations using a gas-jet system coupled to a heavy ion accelerator without any preseparator clearly showed the limitations of the approach. The He and CO gas mixture, which was directly added into the chamber, will result in decomposition of CO gas and produce some aerosol particles. After the experiment of 173W and 179Os in the heavy ion experiments, the Teflon column was covered by a yellowish deposit; the adsorption enthalpy of W and Os carbonyls could therefore not be properly deduced using Monte Carlo simulations.
©2014 Walter de Gruyter Berlin/Boston
Artikel in diesem Heft
- Frontmatter
- Editorial
- Preface
- New nuclear facilities and their analytical applications in China
- Advances in computational actinide chemistry in China
- Recent advances in study of uranium surface chemistry in China
- Nuclear fuel cycle-oriented actinides separation in China
- Radiopharmaceuticals in China: current status and prospects
- Gas-phase chemistry of Mo, Ru, W, and Os metal carbonyl complexes
- Extraction complexes of Pu(IV) with carbamoylmethylphosphine oxide ligands: A relativistic density functional study
- Solvent extraction of uranium(VI) by a dipicolinamide using a room-temperature ionic liquid
- Evaluation study on a macroporous silica-based isohexyl-BTP adsorbent for minor actinides separation from nitric acid medium
- A density functional theory study of the competitive complexation of pyridine against H2O and Cl−− to Cm3+ and Ce4+
- Chemical behavior of neptunium in the presence of technetium in nitric acid media
- Nitrate conversion and supercritical fluid extraction of UO2-CeO2 solid solution prepared by an electrolytic reduction-coprecipitation method
- An advanced purex process based on salt-free reductants
- Extraction behavior of cesium and some typical fission and non-fission products with a new 1,3-di(1-decyloxy)-2,4-crown-6-calix[4]arene
- New insight into Eu(III) sorption mechanism at alumina/water interface by batch technique and EXAFS analysis
- Retention mechanisms and microstructure of Eu(III) on manganese dioxide studied by batch and high resolution EXAFS technique
- Extraction and purification of 227Ac and development of solid 219Rn source
- Mechanism of thorium biosorption by the cells of the soil fungal isolate Geotrichum sp. dwc-1
- Carbon-11 labeled stilbene derivatives from natural products for the imaging of Aβ plaques in the brain
- Synthesis, radiolabeling and in vivo biological evaluation of 99mTc-labeled MAG3-based bisnitroimidazole complexes as tumor hypoxia markers
- γ-radiation effect on dicyclohexano-18-crown-6 aqueous solution in the presence of metal cations
Artikel in diesem Heft
- Frontmatter
- Editorial
- Preface
- New nuclear facilities and their analytical applications in China
- Advances in computational actinide chemistry in China
- Recent advances in study of uranium surface chemistry in China
- Nuclear fuel cycle-oriented actinides separation in China
- Radiopharmaceuticals in China: current status and prospects
- Gas-phase chemistry of Mo, Ru, W, and Os metal carbonyl complexes
- Extraction complexes of Pu(IV) with carbamoylmethylphosphine oxide ligands: A relativistic density functional study
- Solvent extraction of uranium(VI) by a dipicolinamide using a room-temperature ionic liquid
- Evaluation study on a macroporous silica-based isohexyl-BTP adsorbent for minor actinides separation from nitric acid medium
- A density functional theory study of the competitive complexation of pyridine against H2O and Cl−− to Cm3+ and Ce4+
- Chemical behavior of neptunium in the presence of technetium in nitric acid media
- Nitrate conversion and supercritical fluid extraction of UO2-CeO2 solid solution prepared by an electrolytic reduction-coprecipitation method
- An advanced purex process based on salt-free reductants
- Extraction behavior of cesium and some typical fission and non-fission products with a new 1,3-di(1-decyloxy)-2,4-crown-6-calix[4]arene
- New insight into Eu(III) sorption mechanism at alumina/water interface by batch technique and EXAFS analysis
- Retention mechanisms and microstructure of Eu(III) on manganese dioxide studied by batch and high resolution EXAFS technique
- Extraction and purification of 227Ac and development of solid 219Rn source
- Mechanism of thorium biosorption by the cells of the soil fungal isolate Geotrichum sp. dwc-1
- Carbon-11 labeled stilbene derivatives from natural products for the imaging of Aβ plaques in the brain
- Synthesis, radiolabeling and in vivo biological evaluation of 99mTc-labeled MAG3-based bisnitroimidazole complexes as tumor hypoxia markers
- γ-radiation effect on dicyclohexano-18-crown-6 aqueous solution in the presence of metal cations
