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Phototriggered Growth and Detachment of Polymer Brushes with Wavelength Selectivity
ACS Macro Letters ( IF 5.8 ) Pub Date : 2018-02-05 00:00:00 , DOI: 10.1021/acsmacrolett.7b00989
Xinhong Xiong 1 , Lulu Xue 1 , Jiaxi Cui 1
Affiliation  

Both phototriggered growth and removal of polymer chains from surfaces are efficient ways to finely tune interface properties. Combining these two capabilities in one system with independent control can significantly increase the feasibility of photoregulation on surface modification but has not been reported yet. Herein we describe a novel approach to control both the growth and the detachment of polymer brushes independently by light with different wavelengths. The approach is based on a nitrodopamine-based initiator (NO2–BDAM) which contains a catechol structure for surface modification, alkyl bromide group for radical polymerization, and o-nitrophenyl ethyl moiety for photolysis. When dimanganese decacarbonyl (Mn2(CO)10) was applied together with NO2–BDAM as an initiating system, visible light (460 nm) can be used to trigger the site-specific growth of polymer brushes. Resulting polymer brushes can be selectively removed by UV light (360 nm). This method is suitable for different monomers on various substrates, suggesting a facile and robust method to regulate surface properties.

中文翻译:

具有波长选择性的聚合物刷的光触发生长和分离

光触发生长和从表面去除聚合物链都是微调界面特性的有效方法。将这两种功能结合在一个具有独立控制的系统中可以显着增加光调节对表面改性的可行性,但尚未报道。在这里,我们描述了一种通过不同波长的光独立控制聚合物刷的生长和分离的新方法。该方法基于硝基多巴胺引发剂 (NO 2 –BDAM),其中包含用于表面改性的儿茶酚结构、用于自由基聚合的烷基溴基团和用于光解的硝基苯基乙基部分。当十羰基二锰(Mn 2 (CO) 10) 与 NO 2 -BDAM 作为引发系统一起使用,可见光 (460 nm) 可用于触发聚合物刷的位点特异性生长。生成的聚合物刷可以通过紫外光(360 nm)选择性地去除。该方法适用于各种基材上的不同单体,为调节表面性质提供了一种简便而稳健的方法。
更新日期:2018-02-05
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