H4SiW6Mo6O40-Doped Polyaniline-Synthesis, characterization and catalytic properties of acetals and ketals  

作　　者：YANG Shui-jin DU xin—xian PhilippeG．Merle 

机构地区：[1]Hubei Key latboratory of Bioanalytical Technique,College of Chemistry and Enviromnental Engineering,Hubei Normal University．Huangshi435002,China [2]Department of Chemistry and Biochemistry,Concordia University,MontrealH4B IR6,Canada

出　　处：《Journal of Chemistry and Chemical Engineering》2008年第4期35-41,共7页化学与化工（英文版）

摘　　要：A new environmental friendly catalyst, HaSiWrMo6O40/PAn was prepared and identified by means of FT-IR, XRD and TG/DTA. The optimum conditions have been found, that was, mass ratio of m（PAn）： m（HaSiW6Mo6On.） was 1：1.25, volume of methanol was 20 mL, and the reflux reaction time was 2h. The structural identity of Keggin units was preserved after the incorporation into polyaniline matrix. H4SiW6Mo6040/PAn was used as catalyst in catalytic synthesis of acetals and ketals. Effects of n（aldehyde（ketone ））： n（glycol）, catalyst dosage and reaction time on yield were investingated. Optimal conditions were： n（aldehyde（ketone））： n（glycol）=1.0： 1.5; mass fraction of catalyst to reactants, 0.5%; reaction time, 1.0 h and cyclohexane as water-stripped reagent, 15 mL. Under these conditions, yields of actels and ketals were 31.9%-91.6%.

关 键 词：2 4-dimethyl-2-ethoxycarbonylmethyl-1 3-dioxo-lane H4SiW6Mo6O4O polyaniline ACETALATION KETALATION catalyst 

分 类 号：O633.21[理学—高分子化学] TQ224.7[理学—化学]