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Encapsulation of Silicon Nanoclusters in Zeolite Y †

He, Jiliang ; Ba, Yong ; Ratcliffe, Christopher I. ; Ripmeester, John A. ; Klug, Dennis D. ; Tse, John S. ; Preston, Keith F.

Journal of the American Chemical Society, 10/1998, Vol.120(41), pp.10697-10705 [Peer Reviewed Journal]

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  • Title:
    Encapsulation of Silicon Nanoclusters in Zeolite Y †
  • Author: He, Jiliang ; Ba, Yong ; Ratcliffe, Christopher I. ; Ripmeester, John A. ; Klug, Dennis D. ; Tse, John S. ; Preston, Keith F.
  • Description: Luminescent silicon clusters have been synthesized by the chemical vapor deposition of Si2H6 into the α-cages of H32Na24Y zeolite. The synthetic process was monitored by FTIR, TGA-MS, and 29Si and 1H solid-state NMR spectroscopies. In the initial step at 100 °C, Si2H6 reacts with the Brønsted acid sites to produce anchored ZO−Si2H5. Si2H6 is also chemisorbed at Na+ cation sites to give Si2H6/NaHY and is possibly physically trapped within the α-cage by the anchored disilyl groups. Multiple quantum 1H NMR spin counting shows that each α-cage contains 38 H atoms. This is equivalent to 14 Si atoms present as a combination of disilyl and disilane. Subsequent thermal treatment of the entrapped disilane precursors leads, via H2 and SiH4 elimination, to the formation of Si clusters. The formation of Si clusters is complete at 550 °C. These clusters are capped by up to 5 H atoms (determined by 1H NMR spin counting) and attached to the zeolite framework through SiO x linkages (determined...
  • Is Part Of: Journal of the American Chemical Society, 10/1998, Vol.120(41), pp.10697-10705
  • Identifier: ISSN: 0002-7863 ; E-ISSN: 1520-5126 ; DOI: http://dx.doi.org/10.1021/ja9816133
  • Subjects: Chemistry
  • Language: English
  • Source: American Chemical Society (via CrossRef)

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