Long-Range Chirality Transfer in Free Radical Polymerization of Bulky Vinyl Monomers Containing Laterally Attached p-Terphenyl Groups
文献类型：期刊论文
| 作者 | Cui, Jiaxi; Lu, Xiaocun; Liu, Anhua; Wan, Xinhua; Zhou, Qifeng |
| 刊名 | MACROMOLECULES
 |
| 出版日期 | 2009-10-27 |
| 卷号 | 42期号:20页码:7678-7688 |
| ISSN号 | 0024-9297 |
| DOI | 10.1021/ma900879f |
| 英文摘要 | Two series of chiral bulky vinyl monomers, 2-(4'-hexyloxyphenyl)-5-(4'-alkoxycarbonylphenyl)styrene and 2-(4'-alkoxycarbonylphenyl)-5-(4'-hexyloxyphenyl)styrene (abbreviated as S-(+)-HexMm/ R-(-)-HexM0 and S-(+)-MmHex/R-(-)-M0Hex (m = 0, 1, 2, 3), respectively), were designed and synthesized. The former differed the latter only by the relative location of vinyl group, i.e., orientation against or toward the stereocenter. Except for S-(+)-HexM1 and S-(+)-HexM3, all the monomers readily underwent radical polymerization to yield the polymers displaying optical rotations and Cotton effects in the UV-vis absorption region of side groups distinct to the corresponding model compounds and mononmers, implying the formation of main chain chirality, most probable helicity. The influences of the configuration, the distance to p-terphenyl, and the position relative to vinyl group of stereocenter on the chiroptical properties of the resultant polymers were systematically studied. It wits found that inverting the absolute spatial configuration of asymmetric center or changing the parity of methylene number between stereocenter and p-terphenyl alternated the direction of optical rotation of polymer, similar to the odd-even alternation behavior observed in the cholesteric phase of achiral 2,5-bis(4'-hexyloxyphenyl)styrene doped with the corresponding monomers. This parallel indicated an identical driving force for the formation of chiral mesophase and the asymmetric secondary structure of the polymer. When the spatial configuration of stereocenter was Fixed, its distance to p-terphenyl rather than vinyl group played a dominant role in the induction of an excess helical sense. However, the stereogenic center at the ortho position of vinyl group exhibited a larger induction power than those at the meta position. |
| 语种 | 英语 |
| WOS记录号 | WOS:000270807300015 |
| 出版者 | AMER CHEMICAL SOC |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/66717]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Wan, Xinhua |
| 作者单位 | Peking Univ, Beijing Natl Lab Mol Sci, Key Lab Polymer Chem & Phys, Minist Educ,Coll Chem & Mol Engn, Beijing 100871, Peoples R China |
| 推荐引用方式 GB/T 7714 | Cui, Jiaxi,Lu, Xiaocun,Liu, Anhua,et al. Long-Range Chirality Transfer in Free Radical Polymerization of Bulky Vinyl Monomers Containing Laterally Attached p-Terphenyl Groups[J]. MACROMOLECULES,2009,42(20):7678-7688. |
| APA | Cui, Jiaxi,Lu, Xiaocun,Liu, Anhua,Wan, Xinhua,&Zhou, Qifeng.(2009).Long-Range Chirality Transfer in Free Radical Polymerization of Bulky Vinyl Monomers Containing Laterally Attached p-Terphenyl Groups.MACROMOLECULES,42(20),7678-7688. |
| MLA | Cui, Jiaxi,et al."Long-Range Chirality Transfer in Free Radical Polymerization of Bulky Vinyl Monomers Containing Laterally Attached p-Terphenyl Groups".MACROMOLECULES 42.20(2009):7678-7688. |
入库方式： OAI收割
来源：化学研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。