ICCAS OpenIR
Micellization of a series of dissymmetric gemini surfactants in aqueous solution
Wang, XY; Wang, JB; Wang, YL; Ye, JP; Yan, HK; Thomas, RK
2003-10-16
Source PublicationJOURNAL OF PHYSICAL CHEMISTRY B
ISSN1520-6106
Volume107Issue:41Pages:11428-11432
AbstractA series of dissymmetric gemini surfactants, [CmH2m+1(CH3)(2)N(CH2)(6)N(CH3)(2)CnH2n+1]Br-2 (designated as CmC6CnBr2, with constant m + n = 24 and m = 12, 13, 14, 16, 18), have been investigated by electrical conductivity measurement, steady-state fluorescence measurement, and time-resolved fluorescence quenching. The critical micelle concentration (CMC) and the micelle aggregation number (N) were determined and the micropolarity of micelle was characterized. The micelle ionization degree (alpha) was obtained using a combination of electrical conductivity data and N. Furthermore, the Gibbs free energy of micellization (DeltaG(mic)) and the entropy of micellization (DeltaS(mic)) were studied. The results have shown that the degree of dissymmetry (m/n) has an important effect on the micellization in aqueous solution. As the m/n ratio increases, the CMC value decreases linearly, the N value at the CMC increases slightly (from 22 to 30), and alpha decreases slightly down the series. The value of DeltaG(mic) becomes more negative for greater m/n ratios, which supports the belief that the micellization will be more spontaneous and the contribution, per CH2 unit, to micellization increases as the m/n ratio increases. The calculated thermodynamic parameter \TDeltaS(mic)\ is much larger than \DeltaH(mic)\, which indicates that the micellization of the CmC6CBr2 series is entropy-driven. However, the micropolarity of the micelle that is sensed by pyrene varies little, irrespective of the m/n ratio.
DOI10.1021/jp035198z
Indexed BySCI
Language英语
WOS IDWOS:000185857500024
PublisherAMER CHEMICAL SOC
Citation statistics
Cited Times:70[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/80402
Collection中国科学院化学研究所
Corresponding AuthorWang, YL
Affiliation1.Chinese Acad Sci, Inst Chem, Ctr Mol Sci, Key Lab Colloid & Interface Sci, Beijing 100080, Peoples R China
2.Chinese Acad Sci, Inst Chem, Ctr Mol Sci, Key Lab Photochem, Beijing 100080, Peoples R China
3.Univ Oxford, Phys & Theoret Chem Lab, Oxford OX1 3QZ, England
Recommended Citation
GB/T 7714
Wang, XY,Wang, JB,Wang, YL,et al. Micellization of a series of dissymmetric gemini surfactants in aqueous solution[J]. JOURNAL OF PHYSICAL CHEMISTRY B,2003,107(41):11428-11432.
APA Wang, XY,Wang, JB,Wang, YL,Ye, JP,Yan, HK,&Thomas, RK.(2003).Micellization of a series of dissymmetric gemini surfactants in aqueous solution.JOURNAL OF PHYSICAL CHEMISTRY B,107(41),11428-11432.
MLA Wang, XY,et al."Micellization of a series of dissymmetric gemini surfactants in aqueous solution".JOURNAL OF PHYSICAL CHEMISTRY B 107.41(2003):11428-11432.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Wang, XY]'s Articles
[Wang, JB]'s Articles
[Wang, YL]'s Articles
Baidu academic
Similar articles in Baidu academic
[Wang, XY]'s Articles
[Wang, JB]'s Articles
[Wang, YL]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Wang, XY]'s Articles
[Wang, JB]'s Articles
[Wang, YL]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.