Microstructured poly(2-oxazoline) bottle-brush brushes on nanocrystalline diamond
作者:Naima A. Hutter、Andreas Reitinger、Ning Zhang、Marin Steenackers、Oliver A. Williams、Jose A. Garrido、Rainer Jordan
DOI:10.1039/b923789p
日期:——
We report on the preparation of microstructured poly(2-oxazoline) bottle-brush brushes (BBBs) on nanocrystalline diamond (NCD). Structuring of NCD was performed by photolithography and plasma treatment to result in a patterned NCD surface with oxidized and hydrogenated areas. Self-initiated photografting and photopolymerization (SIPGP) of 2-isopropenyl-2-oxazoline (IPOx) resulted in selective grafting of poly(2-isopropenyl-2-oxazoline) (PIPOx) polymer brushes only at the oxidized NCD areas. Structured PIPOx brushes were converted by methyl triflate into the polyelectrolyte brush macroinitiator for the living cationic ring-opening polymerization (LCROP) of 2-oxazolines. The LCROP was performed with 2-ethyl-2-oxazoline (EtOx) as well as 2-(carbazolyl)ethyl-2-oxazoline (CarbOx) as monomers, resulting in structured bottle-brush brushes (BBB) with different pendant side chains and functionalities. FT-IR spectroscopy, fluorescence microscopy, and AFM measurements indicated a high side chain grafting density as well as quantitative and selective reactions. Poly(2-oxazoline) BBBs containing hole conducting carbazole moieties on NCD as electrode material may open the way to advanced amperometric biosensing systems.
我们报告了在纳米晶金刚石(NCD)上制备微结构聚(2-噁唑啉)瓶刷刷(BBB)的情况。通过光刻和等离子处理对 NCD 进行结构化处理,使 NCD 表面形成具有氧化区和氢化区的图案。2-isopropenyl-2-oxazoline (IPOx) 的自引发光接枝和光聚合 (SIPGP) 使聚(2-isopropenyl-2-oxazoline)(PIPOx)聚合物刷只选择性地接枝到氧化的 NCD 区域。结构化的 PIPOx 刷通过三late 甲酯转化为聚电解质刷大引发剂,用于 2-噁唑啉的活阳离子开环聚合(LCROP)。LCROP 以 2-乙基-2-噁唑啉(EtOx)和 2-(咔唑基)乙基-2-噁唑啉(CarbOx)为单体,生成了具有不同悬垂侧链和官能度的结构化瓶刷(BBB)。傅立叶变换红外光谱、荧光显微镜和原子力显微镜测量结果表明,侧链接枝密度高,反应定量且具有选择性。在作为电极材料的 NCD 上含有孔导电咔唑分子的聚 (2-oxazoline) BBB 可为先进的安培生物传感系统开辟道路。