Solubility of β-diketonate complexes for cobalt(III) and chromium(III) in supercritical carbon dioxide

Haruki, Masashi; Kobayashi, Fumiya; Okamoto, Masayuki; Kihara, Sorin; Takishima, Shigeki

doi:10.1016/j.fluid.2010.02.028

Cited by 32 publications

(13 citation statements)

References 31 publications

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“…In these processes, the solubilities of metal complexes in SC CO 2 are the essential data. 29 Currently, the semiconductor industry requires the development of novel deposition processes. The SCF deposition technique has received much attention for deposition of thin films on high-aspect-ratio surfaces of wafers or microchips.…”

Section: Systems Investigatedmentioning

confidence: 99%

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Solubility of Solids in Sub- and Supercritical Fluids: a Review

2011

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A review of solubility data for solid compounds in sub-and supercritical fluids published in the literature between 2005 and 2010 is given in tabular form along with the temperature and pressure ranges and the correlation methods applied by the authors for modeling the experimentally determined data. Compounds are classified into groups on the basis of their chemical nature (inorganic, organometallic, aromatic, nonaromatic organic, polymer), except for biological and pharmaceutical compounds, which are considered as a separate group based on their functionality. For each group of compounds, new findings are reviewed and discussed. Supercritical CO 2 was the preferred solvent for most of the applications, although an increasing interest in other solvents at elevated pressure has been observed, especially for fluorinated hydrocarbons, water, and propane.

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Section: Systems Investigatedmentioning

confidence: 99%

“…Furthermore, SC CO 2 has recently been used to make polymer−metal nanocomposites and metal thin films on high-aspect-ratio surfaces of semiconductors. In these processes, the solubilities of metal complexes in SC CO 2 are the essential data …”

Section: Systems Investigatedmentioning

confidence: 99%

Solubility of Solids in Sub- and Supercritical Fluids: a Review

2011

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“…The spectra shapes of anthracene in supercritical carbon dioxide, hexane, acetone and toluene are almost identical although a peak shift of about 8 nm was observed between supercritical carbon dioxide and the two organic solvents. A calibration curve was prepared using acetone and hexane according to Haruki et al (2009Haruki et al ( , 2010Haruki et al ( , 2011aHaruki et al ( , 2011bHaruki et al ( , 2013. The calibration curve was obtained using the average absorbance in the entire peak wavelength to reduce the significant spectral shift due to a change in fluid density (Inomata et al, 1993;Rice et al, 1995).…”

Section: Determination Methods Of the Concentration Of Anthracene In Smentioning

confidence: 99%

Effects of Solution Concentrations on Crystal Growth of Anthracene Thin Films on Silicon by Rapid Expansion of Supercritical Solutions (RESS) Using Carbon Dioxide

Fujii

Takahashi

Uchida

2015

J. Chem. Eng. Japan / JCEJ

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We report on an investigation to the e ects of supercritical solution concentrations on the crystal morphology, crystallinity, growth rate, and number density of anthracene grains in thin lms on silicon substrates by rapid expansion of supercritical solutions (RESS) using carbon dioxide to examine the crystal growth mechanism of anthracene thin lms. (molar fraction; a threshold concentration) with a change in morphology of grains from dendritic to island-like. Although the number densities of island-like and dendritic grains increased almost linearly with the solution concentration, the trend in the number density of grains also changed at the threshold concentration, with the change in morphology from dendritic to island-like grains. The crystal growth of grains deposited on the substrate was dominant and most of the given supersaturation was consumed for the crystal growth of grains at solution concentrations lower than the threshold concentration. At solution concentrations higher than the threshold concentration, the crystal nucleation on the substrate was dominant and most of the given supersaturation was consumed for the crystal nucleation of grains, followed by the crystal growth of the grains.

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“…Several studies have demonstrated that MA(III), Ln(III), and uranyl ion (U(VI)) can be extracted from solid or liquid materials to scCO 2 as soluble complexes with chelating ligands such as organophosphorus compounds and b-diketones [7][8][9][10][11][12]. The solubility of various metal complexes including U(VI) in scCO 2 has been investigated, and the results have indicated that fluorination of coordinated ligands drastically enhances the solubility of metal complexes by several orders of magnitude compared with non-fluorinated analogues [13][14][15][16][17][18][19]. Previously, we investigated the solubility of uranyl b-diketonato complexes with DMSO, i.e.…”

Section: Introductionmentioning

confidence: 99%

Studies on solubility of uranyl complexes in supercritical carbon dioxide and its controlling factors using UV-visible and¹⁷O- and¹⁹F-NMR spectroscopy

Miyamoto

Tsukahara

Kachi

et al. 2012

Journal of Nuclear Science and Technology

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ARTICLEStudies on solubility of uranyl complexes in supercritical carbon dioxide and its controlling factors using UV- ). The number of yl-oxygen and fluorine atoms also affected the solubility, i.e. the solubility increased in order of Cu(hfa) 2 H 2 O 5 VO(hfa) 2 H 2 O (2.5 6 10 72 M) 5 UO 2 (hfa) 2 H 2 O and in order of Cu(hfa) 2 (2.9 6 10 72 M) 5 Cr(hfa) 3 (3.0 6 10 72 M) 5 Zr(hfa) 4 (4.4 6 10 72 M). Moreover, the intermolecular interactions between CO 2 and specific atoms (yl-oxygen and fluorine) in b-diketonato complexes were examined by 17 O-and 19 F-NMR chemical shifts, and the existence of the apparent van der Waals interactions between CO 2 and the specific atoms was identified. These results showed that the solubility of b-diketonato complexes in scCO 2 was mainly controlled by the strength of CO 2 -complex interactions.

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Solubility of β-diketonate complexes for cobalt(III) and chromium(III) in supercritical carbon dioxide

Cited by 32 publications

References 31 publications

Solubility of Solids in Sub- and Supercritical Fluids: a Review

Solubility of Solids in Sub- and Supercritical Fluids: a Review

Effects of Solution Concentrations on Crystal Growth of Anthracene Thin Films on Silicon by Rapid Expansion of Supercritical Solutions (RESS) Using Carbon Dioxide

Studies on solubility of uranyl complexes in supercritical carbon dioxide and its controlling factors using UV-visible and¹⁷O- and¹⁹F-NMR spectroscopy

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Solubility of β-diketonate complexes for cobalt(III) and chromium(III) in supercritical carbon dioxide

Cited by 32 publications

References 31 publications

Solubility of Solids in Sub- and Supercritical Fluids: a Review

Solubility of Solids in Sub- and Supercritical Fluids: a Review

Effects of Solution Concentrations on Crystal Growth of Anthracene Thin Films on Silicon by Rapid Expansion of Supercritical Solutions (RESS) Using Carbon Dioxide

Studies on solubility of uranyl complexes in supercritical carbon dioxide and its controlling factors using UV-visible and17O- and19F-NMR spectroscopy

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Studies on solubility of uranyl complexes in supercritical carbon dioxide and its controlling factors using UV-visible and¹⁷O- and¹⁹F-NMR spectroscopy