We report herein the synthesis of maltose end-functionalized linear polystyrene (Mal-b-PSt) as well as maltose centered two- and three-branched polystyrene (Mal-b-(PSt)x, x = 2 and 3) via combination of �click� chemistry and atom transfer radical polymerization (ATRP). The azide end-functionalized PSt and branched PSt with an azido group at chain center (N3-PSt, N3-(PSt)2, and N3-(PSt)3) were prepared. Based on the results of size exclusion chromatography (SEC), all the obtained PSts showed monodisperse sharp peak with a narrow polydispersity, resulting that precise polymerizations of styrene were achieved without intra or intermolecular coupling. The chemical structures of the obtained PSts were assigned to the expected structures by proton nuclear magnetic resonance(1H NMR), and the characteristic peaks due to the initiating moiety were observed. Afterwards, the click reaction between the azide-functionalized PSts and N-maltosyl-3-acetamido-1-propyne (ethynyl-Mal) was carried out. Figure 1. <img src='https://acs-archive-assets2.s3.amazonaws.com/240nm/uploads/44485_fig_1.jpg' alt='' /> As a result, the corresponding maltose end-functionalized linear PSt and maltose centered star-shaped PSt (Mal-b-PSt, Mal-b-(PSt)2, and Mal-b-(PSt)3) were obtained and identified by infrared (IR) and 1H NMR spectrometry.

Synthesis of maltose centered star-shaped polystyrenes via atom transfer radical polymerization and click reaction

247th National Meeting (2014)

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