Formation of Layered Silica-Alcohol Nanostructured Materials from Alkoxytrichlorosilanes

Yasuhiro Fujimoto, Atsushi Shimojima, Kazuyuki Kuroda*

*この研究の対応する著者

研究成果: Article査読

49 被引用数 (Scopus)

抄録

Novel layered silica-organic nanostructured materials were prepared by hydrolysis and condensation of alkoxytrichlorosilanes (n-CnH 2n+1OSiCl3, n = 12, 14, 16, 18, and 20) as single precursors. The formation relies on the self-assembly of alkoxysilanetriols (n-CnH2n+1OSi-(OH)3) generated by the preferential hydrolysis of Si-Cl groups in the precursors. The products exhibited the XRD patterns indicative of layered structures whose d spacings varied in the range of 3.95 to 6.13 nm depending on the alkyl chain lengths. The SEM images of the products showed well-defined platelike morphologies on micrometer length scales, reflecting the layered structures of the products. Further structural characterization by solid-state 29Si and 13C NMR and FTIR revealed that the layered structures consisted of bimolecular layers of long-chain alcohols and thin silica layers. Condensation of alkoxysilanetriols proceeded in the solid state to form silica networks, being accompanied by the cleavage of the alkoxy groups. The present results provide a new approach for the construction of silica-based nanostructured materials with well-regulated organic arrays and silica networks.

本文言語English
ページ(範囲)4768-4774
ページ数7
ジャーナルChemistry of Materials
15
25
DOI
出版ステータスPublished - 2003 12 16

ASJC Scopus subject areas

  • 化学 (全般)
  • 化学工学(全般)
  • 材料化学

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