NMR Study of Preferential Endohedral Adsorption of Methanol in Multiwalled Carbon Nanotubes
文献类型：期刊论文
| 作者 | Liu, Xin; Pan, Xiulian; Shen, Wanling; Ren, Pengju; Han, Xiuwen; Bao, Xinhe |
| 刊名 | journal of physical chemistry c
 |
| 出版日期 | 2012-04-12 |
| 卷号 | 116期号:14页码:7803-7809 |
| 产权排序 | 1,1 |
| 通讯作者 | 包信和 |
| 英文摘要 | adsorption of c-13-enriched methanol in multiwalled carbon nanotubes (mwnts) was systematically studied under well-controlled environment by c-13 mas nmr. the results of variable-pressure experiments indicate that the endohedral adsorption of methanol in carbon nanotubes (cnts) is preferential over the exohedral adsorption. the exohedral adsorption does not occur until the endohedral adsorption saturates. the c-13 chemical shift of endohedral methanol exhibits a large upfield shift due to the strong spatial diamagnetic shielding effect induced by the delocalized electrons of nanotubes under the influence of external magnetic field. the exohedral methanol is also shielded, but to a lesser extent. dft calculations support these experimental results. the c-13 spin lattice relaxation times, t-1, of endohedral and exohedral methanol were also measured, and they have different vapor pressure dependence at room temperature. furthermore, variable-temperature experiments suggest that methanol molecules inside cnts may form a layered structure at low temperature with one layer close to the wall and the second layer near the center of the nanotubes. |
| 学科主题 | 物理化学 |
| 类目[WOS] | chemistry, physical ; nanoscience & nanotechnology ; materials science, multidisciplinary |
| 研究领域[WOS] | chemistry ; science & technology - other topics ; materials science |
| 关键词[WOS] | physical adsorption ; water-adsorption ; xe adsorption ; tight-binding ; single ; spectroscopy ; kinetics ; storage ; models ; xenon |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000302591300025 |
| 公开日期 | 2013-10-11 |
| 源URL | [http://159.226.238.44/handle/321008/118352]  |
| 专题 | 大连化学物理研究所_中国科学院大连化学物理研究所 |
| 作者单位 | Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Xin,Pan, Xiulian,Shen, Wanling,et al. NMR Study of Preferential Endohedral Adsorption of Methanol in Multiwalled Carbon Nanotubes[J]. journal of physical chemistry c,2012,116(14):7803-7809. |
| APA | Liu, Xin,Pan, Xiulian,Shen, Wanling,Ren, Pengju,Han, Xiuwen,&Bao, Xinhe.(2012).NMR Study of Preferential Endohedral Adsorption of Methanol in Multiwalled Carbon Nanotubes.journal of physical chemistry c,116(14),7803-7809. |
| MLA | Liu, Xin,et al."NMR Study of Preferential Endohedral Adsorption of Methanol in Multiwalled Carbon Nanotubes".journal of physical chemistry c 116.14(2012):7803-7809. |
入库方式： OAI收割
来源：大连化学物理研究所
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