期刊
JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
卷 250, 期 1-2, 页码 163-168出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.molcata.2006.01.035
关键词
protic ionic liquids; 2-methylpyridinium; Hammett acidity; Bronsted acidity; acid catalysis
sThree new protic ionic liquids based on 2-methylpyridinium were prepared and characterized. Their catalytic activities for the tert-butylation of phenol and the esterification of cyclic olefins with acetic acid were examined and satisfactory results were obtained over 2-methylpyridinium trifluoromethanesulfonate ([2-MPyH]OTf). Hammett method was used to determine the acidity order of these ionic liquids and the results are consistent with the catalytic activities observed in the acid-catalyzed probe reactions. (c) 2006 Published by Elsevier B.V.
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