새로운 산성 이온용액인1-(-sulfonicacid)propyl-3-methylimidazolium bromide ([pmim]Br)과 1-(-sulfonicacid)-butyl-3-methylimidazolium bromide([bmim]Br)을 제조하였다. 이 화합물들을 브롬화 시약 및 용매로 사용하여 , 2시간 반응시켰으며, 간단히 상분리에 의해 1,7-dibromoheptane을 95% 수율로 합성하였다. 이 산성 이온용액을 5회 재사용하였으나 수율 감소가 관찰되지 않았다.
Novel acidic ionic liquids, 1-(-sulfonicacid)propyl-3-methylimidazolium bromide ([pmim]Br)and 1-(-sulfonicacid)butyl-3-methylimidazolium bromide ([bmim]Br), were prepared and used as brominating agents, catalysts and solvents in the synthesis of 1,7-dibromoheptane, respectively. 1,7-dibromoheptan with a yield of 95% was obtained at for 2 h by simple phase separation. The acidic ionic liquid [pmim]Br was recycled for 5 times and the yield of 1,7-dibromoheptane did not decrease remarkably, which indicates that catalysts still maintain good selectivity and activity after recycling. The structure of the acidic ionic liquid [pmim]Br was characterized with IR, and it was found that [pmim]Br had stronger acidity than other ionic liquid.