Characterization of organic phases in the interlayer of montmorillonite using ftir and c-13 nmr
文献类型：期刊论文
| 作者 | Zhu, JX; He, HP; Zhu, LZ; Wen, XY; Deng, F |
| 刊名 | Journal of colloid and interface science
 |
| 出版日期 | 2005-06-01 |
| 卷号 | 286期号:1页码:239-244 |
| 关键词 | Montmorillonite Alkylammonium Organic phase Ftir Nmr |
| ISSN号 | 0021-9797 |
| DOI | 10.1016/j.jcis.2004.12.048 |
| 通讯作者 | Zhu, lz(lzzhu@mail.hz.zj.cn) |
| 英文摘要 | The molecular conformation and mobility of the intercalated surfactant molecules cetyltrimethylammonium bromide (ctmab) have been studied using fourier transform infrared spectroscopy (ftir) and high-resolution single-pulse c-13 magic angle spinning nuclear magnetic resonance (c-13 sp mas nmr) spectroscopy. the conformation and mobility of alkyl chains were found to be a function of the surfactant concentration. the splitting of the methylene scissoring mode at 1473-1463 cm(-1) and the rocking mode at 730-720 cm-1 in ftir are considered to be diagnostic of the packing density increase of the intercalated surfactants within the clay gallery. compared with the c-13 sp mas nmr spectrum of ctmab in the bulk state, 1-3 ppm upfield chemical shifts for end-methyl (delta c-16) and methylene (delta c-15, delta c2-14) of the intercalated surfactant molecules in the hybrids indicate a freer conformational situation. for these hybrids, the conformational freedom decreases with increased of surfactant concentration. in addition, on similar to 2 ppm downfield shift for the c-1 carbon atom in the hybrids with higher surfactant content suggests a special local environment. this study demonstrates the different mobility of carbon atoms in the intercalated alkyl chain. (c) 2005 elsevier inc. all rights reserved. |
| WOS关键词 | SOLID-STATE NMR ; SURFACTANT MOLECULES ; SILICATE GALLERIES ; LAYERED SILICATES ; N-ALKANES ; MAS NMR ; CONFORMATION ; DYNAMICS ; CHAIN ; HEXADECYLAMINE |
| WOS研究方向 | Chemistry |
| WOS类目 | Chemistry, Physical |
| 语种 | 英语 |
| WOS记录号 | WOS:000228935700027 |
| 出版者 | ACADEMIC PRESS INC ELSEVIER SCIENCE |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2373622 |
| 专题 | 物理研究所 |
| 通讯作者 | Zhu, LZ |
| 作者单位 | 1.Zhejiang Univ, Dept Environm Sci, Hangzhou 310028, Peoples R China 2.Chinese Acad Sci, Guangzhou Inst Geochem, Guangzhou 510640, Peoples R China 3.Chinese Acad Sci, Inst Phys, Natl Lab Magnet Resonance & Atom & Mol Phys, Wuhan 430071, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhu, JX,He, HP,Zhu, LZ,et al. Characterization of organic phases in the interlayer of montmorillonite using ftir and c-13 nmr[J]. Journal of colloid and interface science,2005,286(1):239-244. |
| APA | Zhu, JX,He, HP,Zhu, LZ,Wen, XY,&Deng, F.(2005).Characterization of organic phases in the interlayer of montmorillonite using ftir and c-13 nmr.Journal of colloid and interface science,286(1),239-244. |
| MLA | Zhu, JX,et al."Characterization of organic phases in the interlayer of montmorillonite using ftir and c-13 nmr".Journal of colloid and interface science 286.1(2005):239-244. |
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