Abstract
Via ion-pair electrostatic interactions with sulfonate anions, the phosphine-ligated Ru(III) complex cations of [RuIIICl4(L)2]+ (L = 1-butyl-2-(diphenylphosphino)-3-methylimidazolium) were successfully immobilized into a sulfonated SBA-15 framework, leading to the formation of the cationic Ru(III) complex and anionic sulfonate co-modified SBA-15 material (referred to as Ru-SO3-SBA-15). This material was characterized by powder X-ray diffraction (PXRD), transmission electron microscopy (TEM), N2 adsorption–desorption isotherms, FT–IR, and elemental analysis techniques. As a heterogeneous catalyst, Ru-SO3-SBA-15 exhibited comparable activity and selectivity to the parent homogeneous catalyst [RuIIICl4(L)2]PF6 in transfer hydrogenation of ketones. However, as a result of the limited durability of Ru-SO3-SBA-15 in strongly alkaline environments at high temperature, the activity of Ru-SO3-SBA-15 could not be maintained during subsequent recycled uses.
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This work was financially supported by the National Natural Science Foundation of China (Nos. 21273077 and 21076083), and 973 Program from the Ministry of Science and Technology of China (2011CB201403).
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Chen, SJ., You, HX., Vo-Thanh, G. et al. Heterogeneous transfer hydrogenation over mesoporous SBA-15 co-modified by anionic sulfonate and cationic Ru(III) complex. Monatsh Chem 144, 851–858 (2013). https://doi.org/10.1007/s00706-012-0889-z
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DOI: https://doi.org/10.1007/s00706-012-0889-z