Synthesis of Organic/Inorganic Hybrid Quatrefoil-Shaped Star-Cyclic Polymer Containing a Polyhedral Oligomeric Silsesquioxane Core
Synthesis of Organic/Inorganic Hybrid Quatrefoil-Shaped Star-Cyclic Polymer Containing a Polyhedral Oligomeric Silsesquioxane Core
复制标题
含多面体低聚倍半硅氧烷核的有机/无机杂化四叶形星环聚合物的合成
DOI：
10.1021/ma802585k
复制
发表时间：
2009-04-28
期刊：
影响因子：
5.5
通讯作者：
Liu, Shiyong
中科院分区：
文献类型：
--
作者：
Ge, Zhishen;Wang, Di;Liu, Shiyong
We report the synthesis of quatrefoil-shaped star-cyclic polystyrene, star-cyclic PS, containing a polyhedral oligomeric silsesquioxane (POSS) core via the combination of atom transfer radical polymerization (ATRP) and click chemistry techniques. The obtained star-cyclic PS represents a new chain topology in the category of nonlinear-shaped polymers. Using octa(3-chloropropyl) polyhedral oligomeric silsesquioxane, POSS-(Cl)8, as the starting material, its azidation and subsequent click reaction with a slight excess of propargyl 2-bromobutyrate afforded octafunctional initiator, POSS-(Br)8. 8-arm star-linear PS-N3 was obtained by the azidation of star-linear PS-Br, which was synthesized by the ATRP of styrene using POSS-(Br)8 as the initiator. Model reaction between α,ω-diazido-terminated PS (N3-PS-N3) and difunctional propargyl ether confirmed that bimolecular click cyclization reaction can effectively occur under highly dilute conditions. Next, intramolecular click ring closure of star-linear PS-N3 was c...
