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| Type |
Poster Presentation |
| Area |
Material Chemistry |
| Room No. |
Event Hall |
| Time |
4월 20일 (금요일) 11:00~12:30 |
| Code |
MAT.P-406 |
| Subject |
Pseudomorphic Transformation of SBA-15 for Heterogeneous Catalysis of Olefin Oxidation with Immobilized Mn(III)-Porphyrin |
| Authors |
Dae-yong Shin, Suk Joong Lee*
Department of Chemistry, Korea University, Korea
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| Abstract |
Among the various applications of meso-porous silica materials (MPSMs) such as MCM-41 and SBA-15, heterogeneous catalysts based on silica support have been attracted much attention. When Mn(III)-porphyrin is used as a homogenous catalyst, it usually exhibits good reactivity and selectivity but shows fast degradation due to μ-oxo dimer formation and ligand oxidation. Therefore, many kinds of heterogeneous catalytic strategies were developed including the immobilization. In particular, silica-based materials have become one of most widely used supporters for the immobilization of active catalyst. Among them, MPSMs attract much attentions because they usually provide well-defined and highly ordered one-dimensional pores. On the other hand, MCM-48 provides 3-D interconnected uni-sized networks and showed outstanding properties. However, MPSMs containing 3-D interconnected networks with multiple diameters of pores are yet reported.
Here, we like to report new kind of MPSM, pSBA-15, which contains 3-D interconnected networked pores with multiple diameters. This material contains main pores with 10 nm of diameter and secondary pores with 3 nm of diameter. Furthermore, we have employed the surface modification with Mn(III)-porphyrin. So we have envisaged that the primary large pores the would be mostly decorated with active catalysts and the secondary small pores would facilitate the transport of reactants and products because of their sizes. Therefore, SBA-15 and pSBA-15 were compared in parallel to verify their reactivity differences in olefin oxidations.
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| E-mail |
sdyion7214@naver.com |
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121st General Meeting of the KCS