Database of Zeolite Structures
 
Framework Type AST
29Si MAS NMR spectrum of calcined pure silica octadecasil


Note: Toggle plots by clicking on the legend

Peak
T site
Q-type
Chemical Shift
Relative
Peak Width
Peak Shape
Assigment
(topological)
(ppm)
Peak Area
(ppm)
(x)L (1-x)G
Si2
T2
Q4(0Al)
-114.72
1.000
1.76
0.726
Si1
T1
Q4(0Al)
-111.77
4.000
0.58
0.726


References
Spectrum

  Authors: Villaescusa, L.A., Barrett, P.A., Camblor, M.A.
  Title: Calcination of Octadecasil: Fluoride Removal and Symmetry of the Pure SiO2 Host
  Reference: Chem. Mater., 10, 3966-3973 (1998)
  Figure: Figure 4  

Peak Assignment

  Authors: Villaescusa, L.A., Barrett, P.A., Camblor, M.A.
  Title: Calcination of Octadecasil: Fluoride Removal and Symmetry of the Pure SiO2 Host
  Reference: Chem. Mater., 10, 3966-3973 (1998)
  Method: relative intensities

Crystal Structure

  Authors: Villaescusa, L.A., Barrett, P.A., Camblor, M.A.
  Title: Calcination of Octadecasil: Fluoride Removal and Symmetry of the Pure SiO2 Host
  Reference: Chem. Mater., 10, 3966-3973 (1998)

Digitization and Modeling of Spectrum

  To reference this collection of solid-state NMR spectra, we suggest:
  Authors: Brouwer, D.H., Brouwer, C.C., Mesa, S., Semelhago, C.A., Steckley, E.E., Sun, M.P.Y., Mikolajewski, J.G., and Baerlocher, Ch.
  Title: Solid-state 29Si NMR spectra of pure silica zeolites for the International Zeolite Association Database of Zeolite Structures
  Reference: Microporous Mesoporous Mat., 297, 110000 (2020)
Spectrum information

  Obs. freq. 79.459 MHz (Field = 9.4 Tesla)
  Pulse sequence single pulse
  MAS frequency 5.5 kHz
  Spectrum Digitized and processed by Brouwer Lab, Redeemer University
  Data processing Spectrum digitized with WebPlotDigitizer and deconvoluted with Mathematica notebook
 

Chemical Formula

  [Si - O]-AST

Downloads

  Download digitized spectrum in JCAMP-DX format
(This file includes also the data listed on this page)
  Download all lines from the above plot in .csv format
(This file contains only the plotted data)

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