Synthesis and hierarchical structures of amphiphilic polyphenyl acetylenes carrying L-valine pendants
文献类型：期刊论文
| 作者 | Li, BS; Cheuk, KKL; Ling, LS; Chen, JW; Xiao, XD; Bai, CL; Tang, BZ |
| 刊名 | MACROMOLECULES
 |
| 出版日期 | 2003-01-14 |
| 卷号 | 36期号:1页码:77-85 |
| ISSN号 | 0024-9297 |
| DOI | 10.1021/ma0213091 |
| 英文摘要 | In this work, we synthesized amino acid-containing poly(phenylacetylene)s and demonstrated the possibility of tuning their hierarchical structures by internal and external perturbations. A valine-acetylene adduct, 4-ethynylbenzoyl-L-valine methyl ester (5), was readily polymerized by [Rh(nbd)Cl](2), and the resultant "polyester" (1) was selectively hydrolyzed by KOH to its "polyacid" congener, poly(4-ethynylben zoyl-L-valine) (2). (Supra)molecular structures of the polymers were characterized by NMR, IR, UV, CD, and AFM techniques. The macromolecules took helical chain conformations in solutions. Their Cotton effects varied to different extents, when the polymer, solvent, and pH changed respectively from 1 to 2, from methanol to THF, and from neutral to basic. Upon evaporation of their methanol solutions, 1 and 2 self-assembled into micellar spheres and helical cables, respectively. Changing the solvent of 1 to THF changed its folding structure to helical cables, while increasing the pH of the methanol solution of 2 led to the formation of random threads. The denaturation from helical cables to random threads is probably caused by the cleavage of interstrand hydrogen bonds by base-mediated ionization of carboxyl groups of the valine pendants. |
| 语种 | 英语 |
| WOS记录号 | WOS:000180364900014 |
| 出版者 | AMER CHEMICAL SOC |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/80429]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Bai, CL |
| 作者单位 | 1.Chinese Acad Sci, Inst Chem, Ctr Mol Sci, Beijing 100080, Peoples R China 2.Hong Kong Univ Sci & Technol, Dept Chem, Inst Nano Sci & Technol, Kowloon, Hong Kong, Peoples R China 3.Hong Kong Univ Sci & Technol, Dept Phys, Inst Nano Sci & Technol, Kowloon, Hong Kong, Peoples R China 4.Hong Kong Univ Sci & Technol, Inst Mol Technol Drug Discovery & Synth, Open Lab Chirotechnol, Kowloon, Hong Kong, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, BS,Cheuk, KKL,Ling, LS,et al. Synthesis and hierarchical structures of amphiphilic polyphenyl acetylenes carrying L-valine pendants[J]. MACROMOLECULES,2003,36(1):77-85. |
| APA | Li, BS.,Cheuk, KKL.,Ling, LS.,Chen, JW.,Xiao, XD.,...&Tang, BZ.(2003).Synthesis and hierarchical structures of amphiphilic polyphenyl acetylenes carrying L-valine pendants.MACROMOLECULES,36(1),77-85. |
| MLA | Li, BS,et al."Synthesis and hierarchical structures of amphiphilic polyphenyl acetylenes carrying L-valine pendants".MACROMOLECULES 36.1(2003):77-85. |
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。