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Synthesis of Dendrimer-Like Copolymers Based on the Star [Polystyrene-Poly(ethylene oxide)-Poly(ethoxyethyl glycidyl ether)] Terpolymers by Click Chemistry.
來源:王國偉講師個人網站 發布日期:2011-06-20
作者:Guowei Wang, Xiaolan Luo, Yannan Zhang, Junlian Huang*
關鍵字:Click Chemistry
論文來源:期刊
具體來源:J. Polym. Sci. Part A: Polym. Chem. 2009, 47, 4800-4810.
發表時間:2009年

The dendrimer-like copolymers [PEEGE-(PS/PEO)]n (n  2) based on the star[Polystyrene-Poly(ethylene oxide)-Poly(ethoxyethyl glycidyl ether)] [star(PS-PEO-(PEEGE-OH))] terpolymers were synthesized by click chemistry. First, the star-shaped copolymers star[PS-PEO-(PEEGE-Alkyne)] (also termed as [PEEGE-(PS/PEO)]1) were synthesized by the reaction of hydroxyl end group at PEEGE arm (on star[PS-PEO-(PEEGE-OH)]) with propargyl bromide. Then, the small molecule 1,4-diazidobutane (DAB) with two azide groups and pentaerythritol tetrakis (2-azidoisobutyrate) (PTAB) with four azide groups were synthesized and reacted with [PEEGE-(PS/PEO)]1 by the click chemistry for dendrimer-like [PEEGE-(PS/PEO)]2 and [PEEGE-(PS/PEO)]4, respectively. However, in the latter case, only the [PEEGE-(PS/PEO)]3 was formed as the main product because of the steric effect. The final dendrimer-like [PEEGE-(PS/PEO)]n copolymers were characterized by SEC and 1H-NMR in detail. Comparing with the SEC of their precursor [PEEGE-(PS/PEO)]1, the curves of [PEEGE-(PS/PEO)]2 was shifted to the shorter elution time, while that of [PEEGE-(PS/PEO)]n (n  3) was shifted to the longer elution time, which was attributed to the different hydrodynamic volume derived from their separate structures and compositions in THF solution.

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