Hierarchical self-assembly in molecularly ordered phenylene-bridged mesoporous organosilica nanofilaments

Beatrice Camarota, Stephen Mann, Barbara Onida, Edoardo Garrone*

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

13 Citations (Scopus)

Abstract

Herein we report on the mechanism of formation of a hybrid 1 phenylene-bridged hexagonally ordered mesoporous organosilica with crystal-like walls (CW-Ph-HMM). Electron microscopy and X-Ray diffraction studies indicate that the formation of CW-Ph-HMM involves the surfactant-mediated hydrothermal transformation of on amorphous organosilica precursor and that the final product is hierarchically ordered. Significantly, the material is in the form of submicrometre-thick sheets that consist of co-aligned aggregates of needle-like particles (up to 500 nm in length and 50 nm in width). The results suggest that preferential growth along the channel direction of the hexagonally ordered meso-structure is coupled with the propagation of molecular periodicity in the pore walls. Together, these factors give rise to the growth of highly anisotropic primary nanofilaments that become co-aligned to produce micrometer-thick sheets consisting of a periodic array of mesoscopic channels oriented perpendicular to the surface of the flake-like particles.

Original languageEnglish
Pages (from-to)2363-2366
Number of pages4
JournalChemPhysChem
Volume8
Issue number16
DOIs
Publication statusPublished - 12 Nov 2007

Keywords

  • SCALE PERIODICITY
  • HYBRID MATERIALS
  • BENZENE-SILICA
  • WALL STRUCTURE
  • SURFACTANT
  • PMOS

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