Synthesis and characterization of a three-ring bent-core compound
文献类型：期刊论文
| 作者 | Tang, YH; Mei, CY; Li, SJ; Wang, Y; Wang, XD; Wang, LX; Yan, DH; Ye, C |
| 刊名 | CHINESE SCIENCE BULLETIN
 |
| 出版日期 | 2005-09-01 |
| 卷号 | 50期号:17页码:1849-1853 |
| 关键词 | Banana-shaped Mesogens Bent-core Molecules Anti-ferro-electric Alignment |
| ISSN号 | 1001-6538 |
| DOI | 10.1360/982005-6 |
| 英文摘要 | To investigate the vacuum-deposited films of the banana-shaped mesogens, we prepared a three-ring bent-core (that is, banana-shaped) compound m-bis(4-poctoxysryrenyl)benzene (m-OSB) and used it as a prototype for studying the related film physics. Herein the synthesis and the structural characterization of m-OSB are reported. C-13 and H-1 NMR spectra and IR spectrum confirm that m-OSB has a symmetric and all-trans conformation. The results of differential scanning calorimetry, polarizing optical microscopy and X-ray diffractometry indicate that no liquid crystalline phase but two crystalline phases are present in this material: phase I (T < 66 degrees C) and phase II (66 degrees C < T < 157 degrees C); an isotropic state is observed at above 157 degrees C. Combining the X-ray diffraction and the electronic diffraction, we assign the room-temperature crystalline phase I to orthorhombic system and P2(1)2(1)2(1) space group with cell parameters of a = 7.43 angstrom, b = 6.34 angstrom, c = 72.07 angstrom, and alpha = beta = gamma= 90 degrees. Molecular modeling reveals that the molecules in the unit cell adopt a layered structure with an antiferro-electric alignment. The structure of phase II is very similar to that of phase I. Nonlinear optical measurement shows that m-OSB is active for the second harmonic generation (SHG). Such characterization of the bulk material is necessary for the understanding of the growth and microstructures in the films. |
| 语种 | 英语 |
| WOS记录号 | WOS:000233072700008 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/56335]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Yan, DH |
| 作者单位 | 1.Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China 2.Chinese Acad Sci, Inst Chem, Lab Organ Solid, Ctr Mol Sci, Beijing 100080, Peoples R China |
| 推荐引用方式 GB/T 7714 | Tang, YH,Mei, CY,Li, SJ,et al. Synthesis and characterization of a three-ring bent-core compound[J]. CHINESE SCIENCE BULLETIN,2005,50(17):1849-1853. |
| APA | Tang, YH.,Mei, CY.,Li, SJ.,Wang, Y.,Wang, XD.,...&Ye, C.(2005).Synthesis and characterization of a three-ring bent-core compound.CHINESE SCIENCE BULLETIN,50(17),1849-1853. |
| MLA | Tang, YH,et al."Synthesis and characterization of a three-ring bent-core compound".CHINESE SCIENCE BULLETIN 50.17(2005):1849-1853. |
入库方式： OAI收割
来源：化学研究所
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