Diol-linked microporous networks of cubic siloxane cages

Yuko Wada, Kenta Iyoki, Ayae Sugawara-Narutaki, Tatsuya Okubo, Atsushi Shimojima

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

A new class of inorganic-organic hybrid porous materials has been synthesized by a reaction between octa(hydridosilsesquioxane) (H 8Si8O12), which has a double-four-ring (D4R) structure, and various diols, such as 1,3-propanediol (PD), 1,4-cyclohexanediol (CHD), and 1,3-adamantanediol (AD). Solid-state 29Si magic-angle-spinning NMR spectroscopic analysis confirmed that most of the corner Si-H groups reacted with diols to form Si-O-C bonds with retention of the D4R cage. Nitrogen adsorption-desorption studies showed that the products are microporous solids with high BET surface areas (up to ≈580 m2 g-1 for CHD- and AD-linked products). If n-alkanediols are used as linkers, the surface area becomes smaller as the number of carbon atoms is increased. The thermal and hydrolytic stability of the products strongly depend on the type of diol linkers. The highest stabilities are found for the AD-linked products, which are thermally stable up to around 400 °C and remain intact even after being soaked in water for 1 day. In contrast, the PD-linked product is easily hydrolyzed in water to give microporous silica. These results offer a new route toward a series of silica-based porous materials with unique structures and properties.

Original languageEnglish
Pages (from-to)1700-1705
Number of pages6
JournalChemistry - A European Journal
Volume19
Issue number5
DOIs
Publication statusPublished - 2013 Jan 28
Externally publishedYes

Fingerprint

Siloxanes
Silicon Dioxide
Porous materials
Silica
Propylene Glycols
Magic angle spinning
Spectroscopic analysis
Water
Hybrid materials
Desorption
Nitrogen
Carbon
Nuclear magnetic resonance
Adsorption
Atoms
1,4-cyclohexanediol
1,3-propanediol
Hot Temperature
1,3-adamantanediol

Keywords

  • alkoxides
  • cage compounds
  • microporous materials
  • organic-inorganic hybrid composites
  • siloxanes

ASJC Scopus subject areas

  • Chemistry(all)

Cite this

Diol-linked microporous networks of cubic siloxane cages. / Wada, Yuko; Iyoki, Kenta; Sugawara-Narutaki, Ayae; Okubo, Tatsuya; Shimojima, Atsushi.

In: Chemistry - A European Journal, Vol. 19, No. 5, 28.01.2013, p. 1700-1705.

Research output: Contribution to journalArticle

Wada, Y, Iyoki, K, Sugawara-Narutaki, A, Okubo, T & Shimojima, A 2013, 'Diol-linked microporous networks of cubic siloxane cages', Chemistry - A European Journal, vol. 19, no. 5, pp. 1700-1705. https://doi.org/10.1002/chem.201202883
Wada, Yuko ; Iyoki, Kenta ; Sugawara-Narutaki, Ayae ; Okubo, Tatsuya ; Shimojima, Atsushi. / Diol-linked microporous networks of cubic siloxane cages. In: Chemistry - A European Journal. 2013 ; Vol. 19, No. 5. pp. 1700-1705.
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