Dynamic Nitroxide Functional Materials,Chemistry - A European Journal

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Dynamic Nitroxide Functional Materials
Chemistry - A European Journal ( IF 3.9 ) Pub Date : 2018-11-16 , DOI: 10.1002/chem.201804602
Hendrik Woehlk _{1,

2} , Andrea Lauer _{1,

2} , Vanessa Trouillet _{3,

4} , Alexander Welle _{4,

5} , Leonie Barner _{1,

6} , James P. Blinco _{1,

2} , Kathryn E. Fairfull-Smith ₁ , Christopher Barner-Kowollik _{1,

2}

Affiliation

A substrate‐independent and versatile coating platform for (spatially resolved) surface functionalization, based on nitroxide radical coupling (NRC) reactions and the formation of thermo‐labile alkoxyamine functional groups, was introduced. Nitroxide‐decorated poly(glycidyl methacrylate) (PGMA) microspheres, obtained through bioinspired copolymer surface deposition using dopamine and a nitroxide functional dopamine derivative as monomers, were conjugated with small functional groups in a rewritable process. Reversible coding of the nitroxide functional microspheres by NRC and decoding through thermal alkoxyamine fission were monitored and characterized by electron paramagnetic resonance (EPR) spectroscopy and X‐ray photoelectron spectroscopy (XPS). In addition, this nitroxide coating system was exploited in “grafting‐to” polymer surface ligations of poly(methyl methacrylate) (PMMA) and poly(2,2,2‐trifluoroethyl methacrylate) (PTFEMA) in spatially confined areas. Polymer strands terminated with an Irgacure 2959 (2‐hydroxy‐4′‐(2‐hydroxyethoxy)‐2‐methylpropiophenone) photoinitiator were obtained through chain‐transfer polymerization, and subsequently coupled to nitroxide‐immobilized poly(dopamine) (PDA)‐coated silicon substrates by using rapid photoclick NRC reactions. Light‐driven polymer surface coding was visualized by time‐of‐flight secondary ion mass spectrometry (ToF‐SIMS) and XPS imaging.

中文翻译：

动态一氧化氮功能材料

介绍了一种基于氮氧化物自由基偶联（NRC）反应和热不稳定的烷氧基胺官能团形成的，与基材无关的通用涂层平台，用于（空间分辨的）表面功能化。使用多巴胺和一氧化氮官能的多巴胺衍生物作为单体，通过生物启发的共聚物表面沉积获得的装饰有氮氧化物的聚甲基丙烯酸缩水甘油酯（PGMA）微球在可重写的过程中与小官能团结合。通过NRC可逆编码氮氧化物功能微球并通过热烷氧基胺裂变进行解码，并通过电子顺磁共振（EPR）光谱和X射线光电子能谱（XPS）对其进行了表征。此外，该氮氧化物涂层系统被用于在空间受限的区域内将聚（甲基丙烯酸甲酯）（PMMA）和聚（2,2,2-三氟乙基甲基丙烯酸甲酯）（PTFEMA）的聚合物表面“接枝”。通过链转移聚合获得以Irgacure 2959（2-羟基-4'-（2-羟基乙氧基）-2-甲基苯乙酮）光引发剂终止的聚合物链，然后将其偶联至固定有氮氧化物的聚多巴胺（PDA）涂层硅基板通过使用快速的photoclick NRC反应。光驱聚合物表面编码通过飞行时间二次离子质谱（ToF-SIMS）和XPS成像可视化。通过链转移聚合获得以Irgacure 2959（2-羟基-4'-（2-羟基乙氧基）-2-甲基苯乙酮）光引发剂终止的聚合物链，然后将其偶联至固定有氮氧化物的聚多巴胺（PDA）涂层硅基板通过使用快速的photoclick NRC反应。光驱聚合物表面编码通过飞行时间二次离子质谱（ToF-SIMS）和XPS成像可视化。通过链转移聚合获得以Irgacure 2959（2-羟基-4'-（2-羟基乙氧基）-2-甲基苯乙酮）光引发剂终止的聚合物链，然后将其偶联至固定有氮氧化物的聚多巴胺（PDA）涂层硅基板通过使用快速的photoclick NRC反应。光驱聚合物表面编码通过飞行时间二次离子质谱（ToF-SIMS）和XPS成像可视化。

更新日期：2018-11-16

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