| Project/Area Number |
02650551
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
無機工業化学・無機材料工学
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| Research Institution | Osaka University |
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Principal Investigator |
MACHIDA Ken-ichi Osaka University, Applied Chemistry, Associate Professor, 工学部, 助教授 (00157223)
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| Co-Investigator(Kenkyū-buntansha) |
KODAIRA Kohei Hokkaido University, Applied Chemistry, Professor, 工学部, 教授 (60002002)
ADACHI Gin-ya Osaka University, Applied Chemistry, Professor, 工学部, 教授 (60029080)
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| Project Period (FY) |
1990 – 1991
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| Project Status |
Completed (Fiscal Year 1991)
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| Budget Amount *help |
¥1,900,000 (Direct Cost: ¥1,900,000)
Fiscal Year 1991: ¥300,000 (Direct Cost: ¥300,000)
Fiscal Year 1990: ¥1,600,000 (Direct Cost: ¥1,600,000)
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| Keywords | Silicates / Zeolites / Hydrothermal Method / Organic Template Reagent / Rare Earth Complexes / Luminescence Property / 希土類元素 |
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| Research Abstract |
This study was carried out on the influences of pressure conditions and organic ions on the morphology of the silicates prepared by high-pressure hydrothermal method. Also, the physicochemical environmental characteristics of the micropores of zeolites were investigated by using the rare earth ion with excellent luminescence properties as a probe.
(1) Influence of the organic template ions on the morphology of resulting zeolites
A series of unsymmetrical tetraalkyl ammonium salts with the composition formula of R_3R'N^+X^- (R=R') were synthesized and were used to prepare the pentasil-type ZSM-5 zeolite. The composition and morphology of the zeolites obtained by using them were considerably different from those of ZSM-5 zeolite. This indicates that the unsymmetrical ammonium salts possess a possibility for the formation of new zeolites.
(2) Physicochemical environment of the micropores of zeolites
The zeolites ion-exchanged with Eu^<3+> ions showed a red emission bands based on the f-f transition, and this luminescence properties were modified by introductions of organic ligands such as 2, 2' -bipyridene, 2, 6-pyridinecarboxylic acid, and acetylacetone. Particularly, the luminescence intensity was considerably increased. The symmetry around the Eu^<3+> ion in zeolites was discussed on the basis of the luminescence patterns.
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