Bibliothek

X
feed icon rss

Ihre E-Mail wurde erfolgreich gesendet. Bitte prüfen Sie Ihren Maileingang.

Leider ist ein Fehler beim E-Mail-Versand aufgetreten. Bitte versuchen Sie es erneut.

Vorgang fortführen?

Exportieren
  • 1
    Digitale Medien
    Digitale Medien
    17O NMR Investigation of Chemical Homogeneity in Hybrid Systems (1997)
    Springer
    Journal of sol gel science and technology 8 (1997), S. 553-556 
    Details
    ISSN: 1573-4846
    Schlagwort(e): hydrolysis ; condensation ; 17O NMR ; hybrid systems
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Notizen: Abstract 17O NMR experiments using enriched water were performed to followthe hydrolysis-condensation process of dimethyldiethoxysilanetetraethoxysilane and a 1/1 mixture of dimethyldiethoxysilane andtetraethoxysilane (H2O/OEt = 0.5; pH = 2). The spectrarecorded over several hours time period were simulated to followquantitatively the variations of residual water, hydroxyl groups(Si–17 $$\underline {\text{O}} $$ H) and oxo bridges (Si–17 $$\underline {\text{O}} $$ –Si). Presence of a resonance signal due oxo bridges between di- andtetrafunctional Si units clearly demonstrates that co-condensationreactions occur to a large extent between the two alkoxides, and that thesebonds are stable during the aging period.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1023/A:1018335218444
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 2
    Digitale Medien
    Digitale Medien
    17O NMR investigation of chemical homogeneity in hybrid systems (1997)
    Springer
    Journal of sol gel science and technology 8 (1997), S. 553-556 
    Details
    ISSN: 1573-4846
    Schlagwort(e): hydrolysis ; condensation ; 17O NMR ; hybrid systems
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Notizen: Abstract 17O NMR experiments using enriched water were performed to follow the hydrolysis-condensation process of dimethyldiethoxysilane tetraethoxysilane and a 1/1 mixture of dimethyldiethoxysilane and tetraethoxysilane (H2O/OEt=0.5; pH=2). The spectra recorded over several hours time period were simulated to follow quantitatively the variations of residual water, hydroxyl groups (Si−17 OH) and oxo bridges (Si−17 O−Si). Presence of a resonance signal due oxo bridges between di- and tetrafunctional Si units clearly demonstrates that co-condensation reactions occur to a large extent between the two alkoxides, and that these bonds are stable during the aging period.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02436898
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
Schließen ⊗
Diese Webseite nutzt Cookies und das Analyse-Tool Matomo. Weitere Informationen finden Sie hier...