Pressure-induced phase transitions on a liquid crystalline Europium(III) complex
文献类型：期刊论文
| 作者 | Yang, YT; Liu, XJ ; Nakamura, A; Binnemans, K; Liu, J; Liu J(刘景)
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| 刊名 | JOURNAL OF PHYSICAL CHEMISTRY B
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| 出版日期 | 2008 |
| 卷号 | 112期号:17页码:5291-5295 |
| 通讯作者 | [Yang, Yuetao ; Liu, Xiaojun] Nanjing Univ, Inst Acoust, Key Lab Modern Acoust MOE, Nanjing 210093, Peoples R China ; [Nakamura, Arao] Nagoya Univ, Dept Appl Phys, Nagoya, Aichi 8603, Japan ; [Binnemans, Koen] Katholieke Univ Leuven, Dept Chem, B-3001 Louvain, Belgium ; [Liu, Jing] Chinese Acad Sci, Inst High Energy Phys, Beijing Synchrotron Radiat Facil, Beijing 100049, Peoples R China |
| 英文摘要 | The effect of pressure on the phase behavior of the liquid crystalline complex [Eu(bta)(3)L(2)] (bta is benzoyltrifluoroacetonate, and L is the Schiff base 2-hydroxy-N-octadecyl-4-tetradecyloxybenzaldimine) was studied by X-ray diffraction, Raman spectroscopy, and luminescence spectroscopy. The pressure was varied between ambient pressure and 8.0 GPa. [Eu(bta)(3)L(2)] exhibits a smectic A (SmA) phase at room temperature. The complex undergoes a transition from the SmA phase to a solid lamellar structure around 0.22 GPa and another transition from the solid lamellar phase to an amorphous state from 1.6 to 3.5 GPa. At low pressures, the smectic layer spacing increases, and the intermolecular distance decreases. Above 3.5 GPa, both the interlamellar and the intermolecular spacings hardly change, but the intensity of X-ray reflections exhibits a remarkable decrease and eventually vanishes. An interpretation of the changes in the molecular structure is given. It was found that less interdigitation of the alkyl chains situated in adjacent layers and/or a full extension of the alkyl chains occurred at low pressures and that the second phase transition was accompanied by a transfer of the hydrogen atom from the nitrogen atom of the imine group to the oxygen atom of the Schiff base ligand. The effect of applying pressure equals that of the lanthanide contraction on the phase behavior. |
| 学科主题 | Chemistry |
| 类目[WOS] | Chemistry, Physical |
| 研究领域[WOS] | Chemistry |
| 原文出处 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000255292300006 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/240024]  |
| 专题 | 高能物理研究所_多学科研究中心 高能物理研究所_粒子天体物理中心 |
| 作者单位 | 中国科学院高能物理研究所 |
| 推荐引用方式 GB/T 7714 | Yang, YT,Liu, XJ,Nakamura, A,et al. Pressure-induced phase transitions on a liquid crystalline Europium(III) complex[J]. JOURNAL OF PHYSICAL CHEMISTRY B,2008,112(17):5291-5295. |
| APA | Yang, YT,Liu, XJ,Nakamura, A,Binnemans, K,Liu, J,&刘景.(2008).Pressure-induced phase transitions on a liquid crystalline Europium(III) complex.JOURNAL OF PHYSICAL CHEMISTRY B,112(17),5291-5295. |
| MLA | Yang, YT,et al."Pressure-induced phase transitions on a liquid crystalline Europium(III) complex".JOURNAL OF PHYSICAL CHEMISTRY B 112.17(2008):5291-5295. |
入库方式： OAI收割
来源：高能物理研究所
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