Abstract
Ti‐MCM‐41 catalyst was silylated with a new silylating agent, N‐trimethylsilyl‐imidazole (TMSI). TMSI was found to be more effective to improve the hydrophobicity and the catalytic performance of Ti‐MCM‐41 than other silylating agents. Different levels of silylation were obtained by varying the silylation time. A linear relationship was observed between the degree of silylation and each of the intensity ratios I1260/I1083,I845/I1083 and I760/I1083 of SiMe3 spectra bands detected by FT‐IR or the intensity ratio SiMe3/SiO2 of the 29Si‐MAS‐NMR signals. High level of silylation degree significantly enhances both the catalytic activity and the selectivity to epoxide.
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References
C.T. Kreage, M.E. Leonowicz, W.J. Roth, J.C. Vartuli and J.S. Beck, Nature 359 (1992) 710.
J.S. Beck, J.C. Vartuli, W.J. Roth, M.E. Leonowicz, C.T. Kresge, K.D. Schmitt, C.T.-W. Chu, D.H. Olson, E.W. Sheppard, S.B. McCullen, J.B. Higgins and J.L. Schlenker, J. Am. Chem. Soc. 114 (1992) 10834.
A. Sayari, Chem. Mater. 8 (1996) 1840.
A. Corma, M.T. Navarro and J.P. Pariente, J. Chem. Soc. Chem. Commun. (1994) 147.
K.A. Koyano and T. Tatsumi, J. Chem. Soc. Chem. Commun. (1996) 145.
K.A. Koyano and T. Tatsumi, Micropor. Mater. 10 (1997) 259.
T. Blasco, A. Corma, M.T. Navarro and J.P. Pariente, J. Catal. 156 (1995) 65.
A. Corma, P. Esteve and A. Martinez, J. Catal. 161 (1996) 11.
A. Corma, M. Domine, J.A. Gaono, J.L. Jorda, M.T. Navarro, F. Rey, J.P. Pariente, J. Tsuji, B. McCulloch and L.T. Nemeth, J. Chem. Soc. Chem. Commun. (1998) 2211.
K.A. Koyano, T. Tatsumi, Y. Tanaka and S. Nakata, J. Phys. Chem. B 101 (1997) 9436.
T. Tatsumi, K.A. Koyano and N. Igarashi, J. Chem. Soc. Chem. Commun. (1998) 325.
M.B. D'Amore and S. Schwarz, J. Chem. Soc. Chem. Commun. (1999) 121.
J. Bu and H.-K. Rhee, Catal. Lett. 65 (2000) 141.
T. Blasco, M.A. Camblor, A. Corma and J. Prez-Pariente, J. Am. Chem. Soc. 115 (1993) 11806.
D.R. Anderson, in: Analysis of Silicones, ed. A. Lee Smith (Wiley/Interscience, New York, 1974) ch. 10.
D.W. Sindorf and G.E. Marciel, J. Am. Chem. Soc. 105 (1983) 3767.
X.S. Zhao, G.Q. Lu, A.K. Whittaher, G.J. Millar and H.Y. Zhu, J. Phys. Chem. B 101 (1997) 6525.
D.C.M. Dutoit, M. Schneider and A. Baiker, J. Catal. 153 (1995) 165.
F. Boccuzzi, S. Coluccia, G. Ghiotti, C. Morterra and A. Zecchina, J. Phys. Chem. 82 (1978) 1289.
M. Decottignies, J. Phalippou and J. Zarzycki, J. Mater. Sci. 13 (1978) 2605.
H. Kochkar and F. Figueras, J. Catal. 171 (1997) 420.
F. Figueras and H. Kochkar, Catal. Lett. 59 (1999) 79.
C.B. Khouw, C.B. Dartt, J.A. Labinger and M.E. Davis, J. Catal. 149 (1994) 195.
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Bu, J., Rhee, H. Silylation of Ti‐MCM‐41 by trimethylsilyl‐imidazole and its effect on the olefin epoxidation with aqueous H2O2 . Catalysis Letters 66, 245–249 (2000). https://doi.org/10.1023/A:1019072228411
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DOI: https://doi.org/10.1023/A:1019072228411