抄録
Two molecular aggregates, an enzyme and micelle, in supercritical fluids have been studied with respect to their microstructures and activity for chemical reactions. Ester syntheses catalyzed by a lipase have been carried out in supercritical carbon dioxide. In the near-critical region, the rate showed a sharp maximum and (S) - (-) -terpene esters were stereoselectively synthesized from acyl donors and a primary alcohol. The structure of an enzyme and interactions between carbon dioxide and enzyme molecules have been examined by using in situ FTIR and gravimetry. The alkaline fading of crystal violet (CV) is accelerated by using a W/O microemulsion of H2O/AOT/ethane under supercritical conditions. The structure of AOT molecules and the type of interior water molecules may account for the rate enhancement.
