1995 Fiscal Year Final Research Report Summary
Development of Synthetic Methods for New Porous Materials by the Conversion of Inorganic Layred Compounds into Three-dimensional Networks
| Project/Area Number |
05555173
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| Research Category |
Grant-in-Aid for Developmental Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Inorganic materials/Physical properties
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| Research Institution | Waseda University |
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Principal Investigator |
KURODA Kazuyuki Waseda U., School of Sci. & Eng., Prof., 理工学部, 教授 (90130872)
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| Co-Investigator(Kenkyū-buntansha) |
SIGAHARA Yoshiyuki Waseda U., School of Sci.& Eng., Associate Prof., 理工学部, 助教授 (50196698)
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| Project Period (FY) |
1993 – 1995
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| Keywords | Mesoporous Materials / Surface Modification / Intercalation Compounds / Adsorption / Lamellar Phase / Surfactant / Molecular Assembly |
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| Research Abstract |
1) Reactions between a surfactant hexadecyltrimethylammonium ion (C_<16>TMA^+)and kanemite (NaHSi_2O_5・3H_2O) was studied with various C_<16> TMA^+/Si rations. If C_<16>TMA^+/Si was larger than 0.2, lamellar phase was obtained. Solid-state NMR showed that this phase contained Q^4 silicate species, indicating that this reaction was not topotactic intercalation one. When the reaction proceeded at ambient temperature, the lamellar phase at the intial stage contained no Q^4 silicate species, suggesting that the initial product was intercalation compound. Thus, it is assumed that the initially-formed intercalation compound was converted into a cross-linked structure during the reaction.
2) The surface of a porous material derived from kanemite via folded-sheet mechanism was modified by using various silylating reagents. The surface was modified by the reactions with RMe_2SiCl in toluene under protective nitrogen atmosphere. IR,solid-state NMR and DTA showed the successful immobilization of RMe_2Si-groups via siloxane bonding. XRD analysis showed that the structure of the silicate was maintained during the surface modifications. The pore-size distributions indicate that the mean pore size decreased as the length of the alkyl chain increased, suggesting successful control of pore size by surface modification.
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