Core Cross-Linked Multiarm Star Polymers with Aggregation-Induced Emission and Temperature Responsive Fluorescence Characteristics
Core Cross-Linked Multiarm Star Polymers with Aggregation-Induced Emission and Temperature Responsive Fluorescence Characteristics
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DOI：
10.1021/acs.macromol.7b00506
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发表时间：
2017-05
期刊：
影响因子：
5.5
通讯作者：
Zhen Zhang;P. Bilalis;Hefeng Zhang;Y. Gnanou;N. Hadjichristidis
中科院分区：
文献类型：
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作者：
Zhen Zhang;P. Bilalis;Hefeng Zhang;Y. Gnanou;N. Hadjichristidis
载有聚苯乙烯（PS）、聚乙烯（PE）或聚乙烯-b-聚己内酯的聚集诱导发射（AIE）活性核交联多臂星星聚合物（PE-b-PCL）臂，已经通过“臂优先”策略合成，通过原子转移自由基共聚合（ATRP）的双苯乙烯官能化的四苯乙烯（TPE-2St）用作交叉-具有末端ATRP起始部分的线性臂前体的接头。以二甲基亚砜（DMSO）为起始原料，与三乙基硼烷进行同系化反应，再与2-溴异丁酰溴进行氧化/水解和酯化反应，合成了聚乙烯大分子引发剂（PE-Br）;将同系化反应与开环聚合（ROP）相结合，合成了聚乙烯-嵌段-聚己内酯二嵌段大分子引发剂。所有合成的星星聚合物在溶液或本体中均表现出AIE行为。在良好溶剂（例如，四氢呋喃或甲苯），他们表现出低的光致发光（PL）强度的d。
Aggregation-induced emission (AIE) active core cross-linked multiarm star polymers, carrying polystyrene (PS), polyethylene (PE), or polyethylene-b-polycaprolactone (PE-b-PCL) arms, have been synthesized through an “arm-first” strategy, by atom transfer radical copolymerization (ATRP) of a double styrene-functionalized tetraphenylethene (TPE-2St) used as a cross-linker with linear arm precursors possessing terminal ATRP initiating moieties. Polyethylene macroinitiator (PE–Br) was prepared via the polyhomologation of dimethylsulfoxonium methylide with triethylborane followed by oxidation/hydrolysis and esterification of the produced PE–OH with 2-bromoisobutyryl bromide; polyethylene-block-poly(e-caprolactone) diblock macroinitiator was derived by combining polyhomologation with ring-opening polymerization (ROP). All synthesized star polymers showed AIE-behavior either in solution or in bulk. At high concentration in good solvents (e.g., THF, or toluene) they exhibited low photoluminescence (PL) intensity d...