Novel soluble and optically active polyimides containing axially asymmetric 9,9 '-spirobifluorene units: Synthesis, thermal, optical and chiral properties
文献类型：期刊论文
| 作者 | Wu ZL ; Han BC ; Zhang CH ; Zhu DY ; Gao LX ; Ding MX ; Yang ZH |
| 刊名 | polymer
 |
| 出版日期 | 2012 |
| 卷号 | 53期号:25页码:5706-5716 |
| 关键词 | FLUORINATED POLY(ETHER IMIDE)S DIFFERENT PENDANT GROUPS AROMATIC POLYIMIDES TARTARIC ACID SIDE-GROUPS MEMORY CHARACTERISTICS CHIROPTICAL PROPERTIES LIQUID-CRYSTALS RUBBED FILMS MAIN-CHAIN |
| ISSN号 | 0032-3861 |
| 通讯作者 | yang zh |
| 中文摘要 | a new optically active spirobifluorene-based diamine monomer, (r)-2,2'-bis(4-amino-2-trifluoromethylphenoxy)-9,9'-spirobifluorene, was synthesized using (r)-2,2'-dihydroxy-9,9'-spirobifluorene as starting material. the absolute stereochemistry of the chiral diamine was determined by single crystal xray diffraction. a series of novel chiral polyimides were prepared from the diamine with various aromatic dianhydrides via a two-stage process with chemical imidization method. all these optically active polyimides were readily soluble in many organic solvents and could afford flexible, tough and transparent films with an uv vis absorption cutoff wavelength at 351-375 nm. the glass transition temperatures of these polyimides were recorded between 262 and 281 degrees c by differential scanning calorimetry, and the 5% weight loss occurred at temperatures above 510 degrees c. the specific rotations of these chiral polyimides ranged from -48.5 degrees to +73.0 degrees depending on the structures of the aromatic dianhydrides. all the optically active polyimides exhibited high chiral stability in solid state or in dmac solvent at high temperature due to introduction of chiral spirobifluorone group into polymer backbones. the circular dichroism (cd) spectroscopic properties of these chiral polyimides in tetrahydrofuran solutions were also studied. (c) 2012 elsevier ltd. all rights reserved. |
| 收录类别 | SCI收录期刊论文 |
| 语种 | 英语 |
| WOS记录号 | WOS:000311818900012 |
| 公开日期 | 2013-03-18 |
| 源URL | [http://ir.ciac.jl.cn/handle/322003/47823]  |
| 专题 | 长春应用化学研究所_长春应用化学研究所知识产出_期刊论文 |
| 推荐引用方式 GB/T 7714 | Wu ZL,Han BC,Zhang CH,et al. Novel soluble and optically active polyimides containing axially asymmetric 9,9 '-spirobifluorene units: Synthesis, thermal, optical and chiral properties[J]. polymer,2012,53(25):5706-5716. |
| APA | Wu ZL.,Han BC.,Zhang CH.,Zhu DY.,Gao LX.,...&Yang ZH.(2012).Novel soluble and optically active polyimides containing axially asymmetric 9,9 '-spirobifluorene units: Synthesis, thermal, optical and chiral properties.polymer,53(25),5706-5716. |
| MLA | Wu ZL,et al."Novel soluble and optically active polyimides containing axially asymmetric 9,9 '-spirobifluorene units: Synthesis, thermal, optical and chiral properties".polymer 53.25(2012):5706-5716. |
入库方式： OAI收割
来源：长春应用化学研究所
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