关键词: Al-MCM-41分子筛, 三丁基氯化锡, 接枝反应, 表征, 催化, 乙酸异戊酯

Abstract: Surface organometallic chemistry (SOMC) is a recently developed research field. It is of great significance for the quantitative modification , the restoration of solid surface , identification of the physical and chemical nature of the surface and preparation of new catalyst. The high reactivity of Si-OH in Al-MCM-41 was applied. The production of R3Sn-O-MCM-41（R3SnM）was got when the tributyltin chloride and Al-MCM-41 were heated at 170 oC for 5 h under stirring conditions in nitrogen atmosphere. The composition ,structure and surface physical and chemical properties of the samples were characterized by inductively coupled plasma mass spectrometry (ICP-MS), fourier transform infrared spectroscopy (FTIR), N2 adsorption-desorption, X-ray diffraction (XRD), Transmission electron microscopy (TEM) and so on. The results of ICP and organic elemental analysis shows that the grafting yield w（Sn）% was 6.46% for R3SnM. H0 and the number of acid sites for R3SnM respectively were 2.77-0.99 and 4.8mmol•g−1 by Hammett methods. N2 adsorption-desorption, XRD, TEM analysis show that R3SnM keeping the ordered hexagonal mesopore structure, results in decease of the surface areas and the pore size and increase of the mesopours volume and surface acidity, compared to Al-MCM-41. R3SnM was used in the synthesis of isoamyl acetate. The yield of isoamyl acetate is 96% when n (isoamyl alcohol): n (acetic acid) = 1.0:1.0, w (R3SnM) = 5%, 138 oC for 5 h, and the catalyst can be reused. The yield of 86% can be attained when catalyst was reused five times at the same catalytic conditions.