NMR investigation on micellization of ammonium/tetraalkylammonium perfluorooctanoates
文献类型：期刊论文
| 作者 | Xing, Hang1; Lin, Shrong-Shi1; Lu, Run-Chao1; Xiao, Jin-Xin1,2 |
| 刊名 | COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
 |
| 出版日期 | 2008-04-01 |
| 卷号 | 318期号:1-3页码:199-205 |
| 关键词 | Fluorinated Surfactant Tetraalkylammonium Perfluorooctanoate Counterion Conformation Nmr |
| ISSN号 | 0927-7757 |
| DOI | 10.1016/j.colsurfa.2007.12.033 |
| 英文摘要 | The micellization of ammonium/tetraalkylammonium perfluorooctanoates (C7F15COON(CnH2n+1)(4), n = 0-4) was investigated by H-1 and F-19 NMR. Tetraalkylammonium chlorides were also studied by H-1 NMR to simulate the layer of bound counterions on micellar surface. The critical micelle concentration (cmc) determined by NMR was found to decrease with the size of counterions. It was directly proved from the chemical shift change that the longer the alkyl moieties of counterions, the tighter is the contact between perfluorooctanoate headgroups and counterions. Possible conformations of counterions bound to micellar surface were proposed from the chemical shift analysis. The hydrophobicity and structures of counterions with long alkyl chains such as N(C3H7)(4)(+) and N(C4H9)(4)(+) seemed to result in folded, shrink or penetration conformation, rather than ideal models with symmetrically stretched alkyl chains. (C) 2007 Elsevier B.V. All rights reserved. |
| 语种 | 英语 |
| WOS记录号 | WOS:000255623000022 |
| 出版者 | ELSEVIER SCIENCE BV |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/63919]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Xiao, Jin-Xin |
| 作者单位 | 1.Peking Univ, Beijing Natl Lab Mol Sci, Coll Chem & Mol Engn, Beijing 100871, Peoples R China 2.Beijing FLUOBON Surfactant Inst, Beijing 100080, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xing, Hang,Lin, Shrong-Shi,Lu, Run-Chao,et al. NMR investigation on micellization of ammonium/tetraalkylammonium perfluorooctanoates[J]. COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS,2008,318(1-3):199-205. |
| APA | Xing, Hang,Lin, Shrong-Shi,Lu, Run-Chao,&Xiao, Jin-Xin.(2008).NMR investigation on micellization of ammonium/tetraalkylammonium perfluorooctanoates.COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS,318(1-3),199-205. |
| MLA | Xing, Hang,et al."NMR investigation on micellization of ammonium/tetraalkylammonium perfluorooctanoates".COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS 318.1-3(2008):199-205. |
入库方式： OAI收割
来源：化学研究所
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