A family of amphiphilic diblock Janus dendrimers were synthesized by chemoselective “click” coupling of poly(benzyl ether) dendrons, PBE, and poly(ether–ester), PEE, dendrons based on three different ethylene glycol spacers. The well-defined defect-free structure of these dendrimers was proven by MALDI-TOF. In aqueous solutions these dendrimers were able to self-assemble into vesicles with diameter ranging from 140 nm to 3.6 μm or solid micelles (10 to 14 nm diameter). The form of these assemblies was affected by the spacer length between branching points and by the generations of both dendrons. The ethylene glycol moieties in the PEE dendrons induced notable thermosensitivity with sharp transitions observed for all members of the series. The presence of two triazole groups at each branching point was further exploited to fabricate palladium bearing nanomaterials with potential application in catalysis.

中文翻译：

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具有嵌入的金属结合位点的热敏两性Janus树状聚合物。合成与自组装

通过基于三种不同的乙二醇间隔基的聚（苄基醚）树枝状分子，PBE和聚（醚-酯），PEE，树枝状分子的化学选择性“点击”偶联，合成了两亲性的两嵌段Janus树状聚合物。MALDI-TOF证明了这些树枝状聚合物的明确定义的无缺陷结构。在水溶液中，这些树状聚合物能够自组装成直径范围为140 nm至3.6μm的囊泡或固体胶束（直径为10至14 nm）。这些组件的形式受到分支点之间的间隔物长度以及两个树突的生成的影响。PEE树突中的乙二醇部分引发了显着的热敏性，在该系列的所有成员中均观察到了急剧的跃迁。