期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 133, 期 23, 页码 9095-9103出版社
AMER CHEMICAL SOC
DOI: 10.1021/ja202662u
关键词
-
资金
- NSERC Canada
- European Union
- Royal Society
- Deutsche Forschungsgemeinshaft (DFG)
We describe the self-assembly in 2-propanol (2-PrOH) of the triblock copolymer, poly(ferrocenyldimethylsilane-b-2-vinylpyridine-b-2,5-di-(2'-ethylhexyloxy)-1,4-phenylvinylene) (PFS30-b-P2VP(300)-b-PDEHPV13, the subscripts refer to the degree of polymerization). The intense fluorescence of the PDEHPV moieties rendered the resulting cylindrical micelles and their aggregates visible in solution by laser confocal fluorescence microscopy (LCFM). Sonication yielded micelle fragments that could be grown into elongated fiber-like micelles 10 nm in width and nearly monodisperse in length by adding additional block polymer as a solution in tetrahydrofuran. The presence of the conjugated block in the corona promoted slow aggregation of the micelles into hierarchical flower-like structures, but this secondary assembly could be reversed by warming the solution to 50 degrees C for 30 min. When a solution of 500 nm long micelles of PFS30-b-P2VP(300)-b-PDEHPV13 in 2-PrOH was treated sequentially with controlled amounts of the diblock copolymer PFS30-b-P2VP(300), and in intervals of 24 h, with additional aliquots of PFS30-b-P2VP(300)-b-PDEHPV13, PFS30-b-P2VP(30), and PFS30-b-P2VP(300)-b- PDEHPV13, uniform rod-like multiblock co-micelles were obtained with remarkable optical properties: a banded light-emitting barcode structure with fluorescent segments of the triblock copolymer separated by nonemissive segments made up of the diblock copolymer.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据