Details
| Original language | English |
|---|---|
| Pages (from-to) | 699-704 |
| Number of pages | 6 |
| Journal | Journal of molecular structure |
| Volume | 480-481 |
| Publication status | Published - May 1999 |
| Externally published | Yes |
Abstract
Near-infrared Fourier transform Raman spectroscopy represents an excellently suited tool to investigate spectroscopically inorganic and organic molecules occluded in zeolite-type materials as well as interactions between them. Two examples are presented: First, insertion compounds of iodine in various microporous SiO2 modifications (deca-dodecasil 3R, all- silica theta-1 and silicalite-1) are discussed. Intermolecular interaction between the inserted molecules is prevented by occlusion of iodine in the cages of deca-dodecasil 3R, but is allowed in the insertion compounds of hosts with higher pore dimensionalities. The intermolecular coupling is confirmed by an appreciable reduction of the Raman shifts, as observed similarly for liquid and amorphous iodine. The second example deals with pyridine and n-alkylamines (n-propyl-, n-butyl- or n-pentylamine) occluded during synthesis in all-silica ferrierite. Raman spectra reveal for all compounds, regardless of the n-alkylamine used, an interaction between the n- alkylamine and neighboring pyridine molecules, with both amines being located in the ten-membered ring channels. For this reason, it is proposed that bimolecular complexes, consisting of an n-alkylamine weakly bound to a pyridine molecule act as structure-directing agents during synthesis.
Keywords
- Host-guest compounds, Iodine, Porosils, Raman spectroscopy, Zeolite analogues
ASJC Scopus subject areas
- Chemistry(all)
- Analytical Chemistry
- Chemistry(all)
- Spectroscopy
- Chemistry(all)
- Organic Chemistry
- Chemistry(all)
- Inorganic Chemistry
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In: Journal of molecular structure, Vol. 480-481, 05.1999, p. 699-704.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Intermolecular interactions of inorganic and organic molecules embedded in zeolite-type materials probed by near-infrared Fourier transform Raman spectroscopy
AU - Wirnsberger, Gernot
AU - Fritzer, Harald P.
AU - Koller, Hubert
AU - Behrens, Peter
AU - Popitsch, Alois
N1 - Funding information: We thank C. Elis (Research Institute for Electron Microscopy, Technical University of Graz) for preparing SEM images of FER crystals. Moreover, we gratefully acknowledge partial financial support of this work by the Deutsche Forschungsgemeinschaft and the Fonds der Chemischen Industrie (FRG).
PY - 1999/5
Y1 - 1999/5
N2 - Near-infrared Fourier transform Raman spectroscopy represents an excellently suited tool to investigate spectroscopically inorganic and organic molecules occluded in zeolite-type materials as well as interactions between them. Two examples are presented: First, insertion compounds of iodine in various microporous SiO2 modifications (deca-dodecasil 3R, all- silica theta-1 and silicalite-1) are discussed. Intermolecular interaction between the inserted molecules is prevented by occlusion of iodine in the cages of deca-dodecasil 3R, but is allowed in the insertion compounds of hosts with higher pore dimensionalities. The intermolecular coupling is confirmed by an appreciable reduction of the Raman shifts, as observed similarly for liquid and amorphous iodine. The second example deals with pyridine and n-alkylamines (n-propyl-, n-butyl- or n-pentylamine) occluded during synthesis in all-silica ferrierite. Raman spectra reveal for all compounds, regardless of the n-alkylamine used, an interaction between the n- alkylamine and neighboring pyridine molecules, with both amines being located in the ten-membered ring channels. For this reason, it is proposed that bimolecular complexes, consisting of an n-alkylamine weakly bound to a pyridine molecule act as structure-directing agents during synthesis.
AB - Near-infrared Fourier transform Raman spectroscopy represents an excellently suited tool to investigate spectroscopically inorganic and organic molecules occluded in zeolite-type materials as well as interactions between them. Two examples are presented: First, insertion compounds of iodine in various microporous SiO2 modifications (deca-dodecasil 3R, all- silica theta-1 and silicalite-1) are discussed. Intermolecular interaction between the inserted molecules is prevented by occlusion of iodine in the cages of deca-dodecasil 3R, but is allowed in the insertion compounds of hosts with higher pore dimensionalities. The intermolecular coupling is confirmed by an appreciable reduction of the Raman shifts, as observed similarly for liquid and amorphous iodine. The second example deals with pyridine and n-alkylamines (n-propyl-, n-butyl- or n-pentylamine) occluded during synthesis in all-silica ferrierite. Raman spectra reveal for all compounds, regardless of the n-alkylamine used, an interaction between the n- alkylamine and neighboring pyridine molecules, with both amines being located in the ten-membered ring channels. For this reason, it is proposed that bimolecular complexes, consisting of an n-alkylamine weakly bound to a pyridine molecule act as structure-directing agents during synthesis.
KW - Host-guest compounds
KW - Iodine
KW - Porosils
KW - Raman spectroscopy
KW - Zeolite analogues
UR - http://www.scopus.com/inward/record.url?scp=0033522530&partnerID=8YFLogxK
U2 - 10.1016/S0022-2860(98)00725-X
DO - 10.1016/S0022-2860(98)00725-X
M3 - Article
AN - SCOPUS:0033522530
VL - 480-481
SP - 699
EP - 704
JO - Journal of molecular structure
JF - Journal of molecular structure
SN - 0022-2860
ER -