ICCAS OpenIR
Synthesis, chain helicity, assembling structure, and biological compatibility of poly(phenylacetylene)s containing L-alanine moieties
Cheuk, Kevin K. L.1; Li, Bing Shi1,2; Lam, Jacky W. Y.1; Xie, Yong4; Tang, Ben Zhong1,3
2008-08-26
Source PublicationMACROMOLECULES
ISSN0024-9297
Volume41Issue:16Pages:5997-6005
AbstractA functional phenylacetylene monomer containing a naturally occurring building block Of L-alanine, namely 4-ethynylbenzoyl-L-alanine methyl ester (PA-Ae), was synthesized. The monomer was polymerized by organorhodium catalysts, giving the corresponding "polyester" (PPA-Ae) with high molecular weights (M-w up to 1.2 x 10(6)) and stereoregularities (Z content up to 97%) in high yields (up to similar to 91 %). The polyene backbone of PPA-Ae undergoes irreversible Z-to-E isomerization at similar to 180-250 degrees C. The ester groups in the pendants of the polymer are selectively deprotected by the base-catalyzed hydrolysis, producing a "polyacid" with "free" L-alanine pendants (PPA-A). While PA-Ae monomer is CD-inactive at wavelengths longer than 300 nm, both PPA-Ae and PPA-A polymers exhibit strong Cotton effects in the long wavelength region where their polyene backbones absorb, indicating that the chiral pendants have induced the polymer chain to take a helical conformation with an excess in one-handedness. Upon natural evaporation of its solutions, the amphiphilic chains of PPA-Ae self-associate in a cooperative fashion, furnishing a variety of organizational morphologies including twisting cables, spiral ribbons, spherical vesicles, and helical nanotubes. The polymers are biocompatible: the living cells are all survived after they have been subcultured in the presence of the polymers.
DOI10.1021/ma800976e
Indexed BySCI
Language英语
WOS IDWOS:000258580700012
PublisherAMER CHEMICAL SOC
Citation statistics
Cited Times:81[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/64536
Collection中国科学院化学研究所
Corresponding AuthorTang, Ben Zhong
Affiliation1.Hong Kong Univ Sci & Technol, Dept Chem, Kowloon, Hong Kong, Peoples R China
2.Chinese Acad Sci, Inst Chem, Beijing 100080, Peoples R China
3.Zhejiang Univ, Dept Polymer Sci & Engn, Hangzhou 310027, Zhejiang, Peoples R China
4.Hong Kong Univ Sci & Technol, Dept Biol, Kowloon, Hong Kong, Peoples R China
Recommended Citation
GB/T 7714
Cheuk, Kevin K. L.,Li, Bing Shi,Lam, Jacky W. Y.,et al. Synthesis, chain helicity, assembling structure, and biological compatibility of poly(phenylacetylene)s containing L-alanine moieties[J]. MACROMOLECULES,2008,41(16):5997-6005.
APA Cheuk, Kevin K. L.,Li, Bing Shi,Lam, Jacky W. Y.,Xie, Yong,&Tang, Ben Zhong.(2008).Synthesis, chain helicity, assembling structure, and biological compatibility of poly(phenylacetylene)s containing L-alanine moieties.MACROMOLECULES,41(16),5997-6005.
MLA Cheuk, Kevin K. L.,et al."Synthesis, chain helicity, assembling structure, and biological compatibility of poly(phenylacetylene)s containing L-alanine moieties".MACROMOLECULES 41.16(2008):5997-6005.
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