Beta-Diketone

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Tamara P. Chusova - One of the best experts on this subject based on the ideXlab platform.

  • Thermal properties of volatile ruthenium(III) complexes
    Journal of Thermal Analysis and Calorimetry, 2012
    Co-Authors: Kseniya V. Zherikova, Ludmila N. Zelenina, Natalia B. Morozova, Tamara P. Chusova
    Abstract:

    Complexes of ruthenium(III) with the following Beta-Diketone derivatives: 2,4-pentanedione (Ru(acac)_3), 1,1,1,6,6,6-hexafluoro-2,4-pentanedione (Ru(hfac)_3), and 2-methoxy-2,6-dimethyl-3,5-heptanedione (Ru(mdhd)_3) were synthesized, purified, and identified by chemical analysis and melting points. By difference-scanning calorimetry (DSC) in vacuum the thermodynamic characteristics of melting processes were defined. Using the static method with quartz membrane zero-manometer, the temperature dependencies of saturated and unsaturated vapor pressure were obtained for Ru(hfac)_3. The standard thermodynamic characteristics of vaporization processes enthalpy ∆ H _ T* and entropy ∆ S° _ T* were determined.

Yiqun Wu - One of the best experts on this subject based on the ideXlab platform.

  • Synthesis, spectral, and thermal characterizations of Ni(II) and Cu(II) Beta-Diketone complexes with thenoyltrifluoroacetone ligand.
    Spectrochimica acta. Part A Molecular and biomolecular spectroscopy, 2006
    Co-Authors: Zhimin Chen, Yiqun Wu, Fuxin Huang, Donghong Gu
    Abstract:

    Two kinds of nickel(II) and copper(II) Beta-Diketone complexes derived from thenoyltrifluoroacetone ligand with blue-violet light absorption were synthesized by reacting free ligand and different metal(II) ions in sodium methoxide solution. Their structures were postulated based on elemental analysis, ESI-MS, FT-IR spectra and UV-vis electronic absorption spectra. Smooth films on K9 glass substrates were prepared using the spin-coating method. Their solubility in organic solvents, absorption properties of thin film and thermal stability of these complexes were evaluated.

  • Rare earth doped β-diketone complexes as promising high-density optical recording materials for blue optoelectronics
    Materials Letters, 2005
    Co-Authors: Dongzhe Ma, Yiqun Wu
    Abstract:

    Some kinds of rare earth Beta-Diketone complexes with blue-violet light absorption edge were synthesized using the ligands of thenoyltrifluoroacctone (HTTA), 2, 2'-dipyridyl (BIPY) and different metal ions (Gd3+, Sm3+ and La3+). Their contents, structures and optoelectronic parameters were monitored by elemental analysis, MS, IR and UV spectra. The solubility of rare earth Beta-Diketone complexes in 2, 2, 3, 3-tetrafluoro-1-propanol (TFP) and absorption properties of their films in the region 300-800 nm were measured. The influence on the difference of absorption maximum from rare earth Beta-Diketone complexes to Beta-Diketone ligand by different metal ions was studied. In addition, the thermal stability of rare earth Beta-Diketone complexes was also reported. (C) 2005 Elsevier B.V. All rights reserved.

Kseniya V. Zherikova - One of the best experts on this subject based on the ideXlab platform.

  • Thermal properties of volatile ruthenium(III) complexes
    Journal of Thermal Analysis and Calorimetry, 2012
    Co-Authors: Kseniya V. Zherikova, Ludmila N. Zelenina, Natalia B. Morozova, Tamara P. Chusova
    Abstract:

    Complexes of ruthenium(III) with the following Beta-Diketone derivatives: 2,4-pentanedione (Ru(acac)_3), 1,1,1,6,6,6-hexafluoro-2,4-pentanedione (Ru(hfac)_3), and 2-methoxy-2,6-dimethyl-3,5-heptanedione (Ru(mdhd)_3) were synthesized, purified, and identified by chemical analysis and melting points. By difference-scanning calorimetry (DSC) in vacuum the thermodynamic characteristics of melting processes were defined. Using the static method with quartz membrane zero-manometer, the temperature dependencies of saturated and unsaturated vapor pressure were obtained for Ru(hfac)_3. The standard thermodynamic characteristics of vaporization processes enthalpy ∆ H _ T* and entropy ∆ S° _ T* were determined.

Russ D. Brauer - One of the best experts on this subject based on the ideXlab platform.

  • Supercritical fluid extraction of thorium and uranium ions from solid and liquid materials with fluorinated [beta]-diketones and tributyl phosphate
    Environmental Science & Technology, 1994
    Co-Authors: Fred M. Jean, Russ D. Brauer
    Abstract:

    A recent report shows that trivalent lanthanide and uranyl ions can be extracted by supercritical CO[sub 2] containing the fluorinated [beta]-diketone, 2,2-dimethyl-6,6,7,7,8,8,8-hyptafluoro-3,5-octanedione (FOD). Extraction and separation of actinides by supercritical fluids are of particular interest today because of potential applications to nuclear waste analysis and management. This paper describes the conditions of extracting thorium and uranium ions from solid and liquid materials by supercritical CO[sub 2] containing different [beta]-diketones. The synergistic extraction of the actinides by mixed ligands involving [beta]-diketones and tributyl phosphate (TBP) in supercritical CO[sub 2] is also reported. Synergistic extraction is another approach to improve the efficiencies of ligands of SFE of actinides. Potential applications of this new extraction technique for the separation of actinides from environmental samples are discussed. The five [beta]-diketones tested for the extraction of uranyl and Th(IV) ions in supercritical carbon dioxide are given as follows: acetylacetone, trifluoroacetylacetone, hexafluoroacetylacetone, thienoyltrifluoroacetylacetone, and FOD. 12 refs., 5 tabs.

  • Supercritical fluid extraction of lanthanides and actinides from solid materials with a fluorinated .beta.-diketone
    Analytical Chemistry, 1993
    Co-Authors: Russ D. Brauer, K. E. Laintz
    Abstract:

    Direct extraction of metal ions by supercritical carbon dioxide is highly inefficient because of the charge neutralization requirement and the weak solute-solvent interactions. One suggested approach of extracting metal ions by supercritical carbon dioxide is to convert the charged species into metal chelates using a chelating agent in the fluid phase. This paper describes a method of extracting lanthanide and uranyl ions from a solid material by supercritical carbon dioxide containing a fluorinated Beta-Diketone, 2,2-dimethyl-6,6,7,7,8,8,8-heptafluoro-3,5-octanedione(FOD). Potential applications of this SFE method for separating the f-block elements from environmental samples are discussed. 13 refs., 2 tabs.

Donghong Gu - One of the best experts on this subject based on the ideXlab platform.