Citation: Shen Qiang, Li Gan-Zuo, Huang Yan-Zhang, Ye Jian-Ping. The Influence of Alcohol on the Aggregation Behavior of DDAHPS Molecules in Water[J]. Acta Physico-Chimica Sinica, ;1999, 15(03): 216-221. doi: 10.3866/PKU.WHXB19990305
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The influence of alcohol on the aggregation behavior of the zwitterionic surfactant (dodecyldimethylammonium hydroxyl propanesulfonate, DDAHPS) molecules in water has been investigated by the steady state fluorescence quenching technique and the time resolved fluorescence method. The results show that the aggregation number of surfactant ( N ) decreases with the increasing addition of n butanol in 4.0×10 -2 mol•L -1 DDAHPS aqueous solution. Keeping the concentration of alcohol constant(ie. 2.14×10 -2 mol•L -1 ),the longer of the carbon chain of alcohol, the larger of the N value. The addition of n propanol and n butanol decrease the N value, while the n pentanol, n hexanol and n heptanol increase the N value. We also measured the effect of alcohol on the microenvoirnment polarity, pyrene fluorescence lifetime and efficiency of intramicellar excimer formation by pyrene.
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