抄録
Reduction of 2, 6-dichlorophenol indophenol (DPIP) with diphenylcarbazide (DPC) as a reductant was pH-dependently accelerated by surfactant micelles of anionic SDS, cationic CTAB, zwitterionic sulfobetaine-14 (SB-14) and nonionic lauryldimethylamine-N-oxide (LDAO). The acceleration effect was larger at acidic side than alkaline side with any surfactant, though its degree varied with the species of the surfactants. At pH 4.5, SDS accelerated the reaction by about 50 times which was the largest rate among those given by any surfactant at pH 4.5-8.1. Experimental results suggested that microenvironment as well as concentration of the reactants in micellar sphere might affect pH-dependent acceleration to an inherent extent of surfactant species.
