Jump to main content
Jump to site search

Issue 10, 2003
Previous Article Next Article

One-pot synthesis of phenyl- and amine-functionalized silica fibers through the use of anthracenic and phenazinic organogelators

Author affiliations

Abstract

In a typical one-pot synthesis procedure, hybrid organosilica fibers were grown by templating the co-condensation between TEOS and selected organotrialkoxysilanes (20 mol% of phenyltriethoxysilane, PTES, or aminopropyltriethoxysilane, APTES) through the use of DDOA (2,3-bis(n-decyloxy)anthracene) and DUOP (2,3-bis(n-undecyloxy)phenazine) organogelators in a compatible solvent (ethanol or acetonitrile, respectively). Interestingly, the successful replication of organogelator fibrous assemblies was accomplished working at low pH values (ca. 2–3) in acid catalysed conditions. By SEM and TEM characterizations the hybrid organosilicas were seen to consist of submicronic fibers (100–200 nm) aggregated into highly anisotropic fibrous bundles (1–15 µm thick). In addition, molecular and/or supramolecular interactions between the organogelator and the growing organosiloxane network proved to have an important effect on fiber thickness and on fiber aggregation (intertwined/co-aligned, lamellar- or ribbon-like fibrous bundles). After removal of the organogelator (by calcination or by Soxhlet washing), the fibrous morphologies were perfectly conserved, and the presence of phenyl and amine moieties was confirmed by FTIR spectroscopy and also by elemental chemical analysis. The formation of a well-condensed and interconnected organosiloxane network was proven by 29Si MAS NMR spectroscopy. Moreover, the accessibility and reactivity of the grafted amine groups were also corroborated by performing a simple post-functionalization heterogeneous reaction with diluted benzaldehyde.

Graphical abstract: One-pot synthesis of phenyl- and amine-functionalized silica fibers through the use of anthracenic and phenazinic organogelators

Back to tab navigation

Publication details

The article was received on 23 Apr 2003, accepted on 25 Jul 2003 and first published on 03 Sep 2003


Article type: Paper
DOI: 10.1039/B304479N
Citation: J. Mater. Chem., 2003,13, 2505-2514
  •   Request permissions

    One-pot synthesis of phenyl- and amine-functionalized silica fibers through the use of anthracenic and phenazinic organogelators

    M. Llusar, G. Monrós, C. Roux, J. L. Pozzo and C. Sanchez, J. Mater. Chem., 2003, 13, 2505
    DOI: 10.1039/B304479N

Search articles by author

Spotlight

Advertisements