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  • 1
    Electronic Resource
    Electronic Resource
    Synthesis and properties of polyoxometalates based inorganic-organic polymers (1992)
    s.l. : American Chemical Society
    Chemistry of materials 4 (1992), S. 4-7 
    Details
    ISSN: 1520-5002
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/cm00019a002
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  • 2
    Electronic Resource
    Electronic Resource
    Investigation of Ion-Conducting Ormolytes: Structure-Property Relationships (1994)
    s.l. : American Chemical Society
    Chemistry of materials 6 (1994), S. 127-134 
    Details
    ISSN: 1520-5002
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/cm00038a007
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  • 3
    Electronic Resource
    Electronic Resource
    Dynamics of the sol-gel transition in organic-inorganic nanocomposites
    Amsterdam : Elsevier
    Chemical Physics Letters 220 (1994), S. 35-39 
    Details
    ISSN: 0009-2614
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0009-2614(94)00142-1
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  • 4
    Electronic Resource
    Electronic Resource
    Electrochemical degradation of WO"3.nH"2O thin films
    Amsterdam : Elsevier
    Solid State Ionics 51 (1992), S. 239-247 
    Details
    ISSN: 0167-2738
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0167-2738(92)90206-5
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  • 5
    Electronic Resource
    Electronic Resource
    An ''all gel'' electrochromic device
    Amsterdam : Elsevier
    Solid State Ionics 28-30 (1988), S. 1722-1725 
    Details
    ISSN: 0167-2738
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0167-2738(88)90449-3
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  • 6
    Electronic Resource
    Electronic Resource
    Investigation of New Ion Conducting Ormolytes Silica-Polypropyleneglycol (1998)
    Springer
    Journal of sol gel science and technology 13 (1998), S. 909-913 
    Details
    ISSN: 1573-4846
    Keywords: hybrid material ; ionic conductor ; solid electrolyte ; silica-polypropyleneglycol
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Two groups of hybrid organic-inorganic composites exhibiting ionic conduction properties, so called ORMOLYTES (organically modified electrolytes), have been prepared by the sol-gel process. The first group has been prepared from mixture of a lithium salt and 3-isocyanatopropyltriethoxysilane(IsoTrEOS),O,O′-bis(2-aminopropyl)polypropyleneglycol. These materials produce chemical bonds between the organic (polymer) and the inorganic (silica) phases. The second group has been prepared by an ultrasonic method from a mixture of tetraethoxysilane (TEOS), polypropyleneglycol and a lithium salt. The organic and inorganic phases are not chemically bonded in these samples. The Li+ ionic conductivity, σ, of all these materials has been studied by AC impedance spectroscopy up to 100°C. Values of σ up to 10−6 Ω−1 · cm−1 have been found at room temperature. A systematic study of the effects of lithium concentration, polymer chain length and the polymer to silica weight ratio on σ shows that there is a strong dependence of σ on the preparation conditions. The dynamic properties of the Li+ ion and the polymer chains as a function of temperature between −100 and 120°C were studied using 7Li solid-state NMR measurements. The ionic conductivity of both families are compared and particular attention is paid to the nature of the bonds between the organic and inorganic components.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008627424438
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  • 7
    Electronic Resource
    Electronic Resource
    Effect of Addition of MTES on the Structure of Siloxane-PPG Nanocomposites (2000)
    Springer
    Journal of sol gel science and technology 19 (2000), S. 429-433 
    Details
    ISSN: 1573-4846
    Keywords: hybrid materials ; xerogels structure ; small-angle x-ray scattering ; nuclear magnetic resonance ; nanostructures
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Hybrid transparent and flexible siloxane-polypropyleneglycol (PPG) materials with covalent bonds between the inorganic (siloxane) and organic (polymeric) phases were prepared by sol-gel process. In order to improve the quality of the mechanical properties of these materials, different amounts of methyltriethoxysilane (MTES) were added to the initial sol. The effect of MTES addition on the structure of the composites was studied by Small-Angle X-Ray Scattering (SAXS) and 29Si Nuclear Magnetic Resonance (29Si NMR). In absence of MTES, SAXS spectra exhibit a peak that is assigned to spatial correlation due to short range order between the siloxane clusters embedded in the polymeric phase. The experimental results indicate that, for low MTES concentrations ([MTES]/[O] ≤ 0.8, O: ether-type oxygen of PPG), the silicon species resulting from hydrolysis and condensation of MTES fill the open spaces between polymeric chains, interacting with the ether-type oxygens. For larger MTES content ([MTES]/[O] ≥ 0.8), the number of “free” ether-type oxygen sites avalaible for reaction with such silicon species is not large enough. Consequently, a fraction of silicon species resulting from MTES addition graft to siloxane clusters formed by hydrolysis and condensation of the hybrid precursor. For all MTES concentrations the condensation degree of the siloxane phase, determined from 29Si NMR spectroscopy, is high (〉69%), as expected under neutral pH synthesis conditions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008795313024
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  • 8
    Electronic Resource
    Electronic Resource
    Polymetalates based organic-inorganic nanocomposites (1994)
    Springer
    Journal of sol gel science and technology 3 (1994), S. 189-197 
    Details
    ISSN: 1573-4846
    Keywords: nanocomposites ; sol-gel ; heteropolymetalates ; photochromics ; electrochemical properties
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract New nanocomposites materials have been synthesized. They present electrochemical and photochromic properties. They are based on a hybrid organic-inorganic network, in which tungsten heteropolyoxometalates (PW12O 40 3− , SiW12O 40 4− , W10O 32 4− , polymeric tungstate) are entrapped. High tungsten ratios could be reached and films or bulk materials have been obtained. The structure of these materials is described on the basis of multi-spectroscopic investigations (IR, EPR, NMR). Electrochemical redox reactions have been observed in thin films. Dark blue reversible coloration of the materials is obtained under UV irradiation. The photochromic mechanism has been investigated and shows the reversible formation of carbonyl group.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00486557
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  • 9
    Electronic Resource
    Electronic Resource
    All Sol-Gel Electrochromic Devices with Li+ Ionic Conductor, WO3 Electrochromic Films and SnO2 Counter-Electrode Films (1998)
    Springer
    Journal of sol gel science and technology 11 (1998), S. 87-104 
    Details
    ISSN: 1573-4846
    Keywords: all sol-gel electrochromic devices ; WO3 ; SnO2 ; ionically conductive inorganic-organic hybrids
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract This paper reports on the development of all sol-gel EC devices, having the configuration WO3/ormolyte/SnO2:Mo, WO3/ormolyte/SnO2:Sb and WO3/ormolyte/SnO2:Sb:Mo, where all three internal layers, including the ionically conductive inorganic-organic hybrid (ormolyte), are prepared via the sol-gel route. The electrochemical and optical properties of EC devices are presented and their cycling stability and reversibility of their optical modulation assessed. The transmission modulation of the devices depends on the thickness of the active electrochromic, counter-electrode and ormolyte layer. The electrochemical and optical properties of individual films and the structural properties of the ormolyte are described and correlated with the stability of the all sol-gel EC devices.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008697101623
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  • 10
    Electronic Resource
    Electronic Resource
    Polyoxometallates based macromolecules (1994)
    Springer
    Journal of sol gel science and technology 2 (1994), S. 147-151 
    Details
    ISSN: 1573-4846
    Keywords: organic-inorganic hybrids ; polyoxometallates ; photochromism ; electrochemistry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The synthesis of polyoxometallates based macromolecules P n (P=[SiW11O40(SiR)2]4−.4Bu4N+) presenting interesting physical properties (electrochemistry, photochemistry) is detailed. Three different paths are described, organic polymerization of monomers P (R = vinyl, allyl, methacryl, styryl), hydrosilation of monomers (R=H, R′=vinyl) or direct synthesis of polymeric species. These different polymers are characterized from a multi spectroscopic study (IR, NMR), and scattering experiments (QELS, SAXS). Reaction conditions influence both the polymerization yield, the size, the structure, and the properties of these organic-inorganic hybrids.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00486230
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