ICCAS OpenIR
Thermodynamics of hydrophobic interaction of dissymmetric gemini surfactants in aqueous solutions
Bai, GY; Wang, JB; Wang, YJ; Yan, H; Thomas, RK
2002-07-04
Source PublicationJOURNAL OF PHYSICAL CHEMISTRY B
ISSN1520-6106
Volume106Issue:26Pages:6614-6616
AbstractWe have used microcalorimetry to measure the critical micelle concentrations (CMC) and enthalpies of micellization (DeltaH(mic)) of the series of dissymmetric cationic gemini surfactants, [CmH2m+1(CH3)(2)N(CH2)(6)N-(CH3)(2)CnH2n+1]Br-2, designated as CmC6CnBr2, with constant n + m = 24 and n = 6, 8, 10, 11, 12. There is a small decrease in CMC as the ratio m/n increases but this decrease is not much larger than the error. On the other hand there is a very large decrease in the enthalpy of micellization with m/n. This is consistent with a large increase in the hydrophobic contribution to micellization with m/n. To explain the relative invariance of the CMC. there must be a corresponding large increase in the entropy of micellization with m/n. The change in the hydrophobic contribution is explained in terms of the relative strengths of internal and external hydrophobic contacts down the series.
DOI10.1021/jp0143903
Indexed BySCI
Language英语
WOS IDWOS:000176592900002
PublisherAMER CHEMICAL SOC
Citation statistics
Cited Times:51[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/78364
Collection中国科学院化学研究所
Corresponding AuthorYan, H
Affiliation1.Chinese Acad Sci, Inst Chem, Ctr Mol Sci, Beijing 100080, Peoples R China
2.Univ Oxford, Phys & Theoret Chem Lab, Oxford OX1 3QZ, England
Recommended Citation
GB/T 7714
Bai, GY,Wang, JB,Wang, YJ,et al. Thermodynamics of hydrophobic interaction of dissymmetric gemini surfactants in aqueous solutions[J]. JOURNAL OF PHYSICAL CHEMISTRY B,2002,106(26):6614-6616.
APA Bai, GY,Wang, JB,Wang, YJ,Yan, H,&Thomas, RK.(2002).Thermodynamics of hydrophobic interaction of dissymmetric gemini surfactants in aqueous solutions.JOURNAL OF PHYSICAL CHEMISTRY B,106(26),6614-6616.
MLA Bai, GY,et al."Thermodynamics of hydrophobic interaction of dissymmetric gemini surfactants in aqueous solutions".JOURNAL OF PHYSICAL CHEMISTRY B 106.26(2002):6614-6616.
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