Improvement in hydrophobicity of Ti-MCM-41 using a new silylation agent MSTFA

被引：51

作者：

Bu, J

Rhee, HK ^{[1
]}

机构：

[1] Seoul Natl Univ, Sch Chem Engn, Seoul 151742, South Korea

[2] Seoul Natl Univ, Inst Chem Proc, Seoul 151742, South Korea

来源：

CATALYSIS LETTERS | 2000年 / 65卷 / 1-3期

关键词：

silylation; MSTFA; hydrophobicity; Ti-MCM-41; epoxidation; cyclohexene;

D O I：

10.1023/A:1019096617082

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A new silylation agent, N-methyl-N-(trimethylsilyl) trifluoroacetamide (MSTFA), has been employed for the trimethylsilylation of Ti-MCM-41. The FT-IR spectra revealed that the hydrophobic trimethylsilyl group, -Si(CH3)(3), in MSTFA can replace the hydrogen in the silanol at room temperature. By virtue of their high volatility, MSTFA and its derivative, N-methyl trifluoroacetamide, can be readily removed after silylation. The MSTFA silylated Ti-MCM-41 is found to be more hydrophobic than that silylated by BSTFA and to bring about a significant enhancement in the yield of epoxide from cyclohexene epoxidation with aqueous H2O2.

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页码：141 / 145

页数：5

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