简介：AnovelBrфnstedacidicionicliquid(IL)basedonthecyclicguanidiniumcationhasbeensynthesized.ThisIL,asastrongBrфnstedacidcatalystorsolvent,showshighcatalyticactivityandbiphsaicbehavorintheesterificationsofcarboxylicacidsandalcohols.TheproducedestersasaseparatephasecanbeconvenientlydecantedoutfromtheILandtheILisrecyclablewithoutanylossofcatalyticactivity.
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