Accumulation of Functional Block Telomers on Metal Surfaces
Accumulation of Functional Block Telomers on Metal Surfaces
复制标题
功能嵌段调聚物在金属表面的积累
作者：
Hiromi Kitano and;K. Ohhori
通过N，N-二乙基二硫代氨基甲酰基甲基苯甲酸琥珀酰亚胺酯与胱胺二盐酸盐的偶联反应，合成了一种具有引发、链转移和终止功能的新型含二硫基的引发转移酯（Cys-BDC）。以甲基丙烯酸（MA）和2-甲基丙烯酰氧乙基-D-吡喃葡萄糖苷（MEGlc）为单体，在引发剂和N，N，N '，N'-二硫化四乙基秋兰姆存在下，通过紫外光连续照射进行嵌段共聚。嵌段调聚物在金电极和真空蒸发的金薄膜上形成了自组装单分子层（SAM），分别通过循环伏安法和红外反射吸收光谱（IRRAS）证实。MA调聚物嵌段在金表面和银胶体上的pH响应性分别通过接触角和接触电位测量来证实。在金表面和银胶体上分别用红外光谱和浊度法测定了凝集素（伴刀豆球蛋白A）对MEGlc块中葡萄糖残基的识别。
A disulfide-group-carrying novel iniferter (a compound which pursues initiation, chain transfer, and termination) (Cys-BDC) was prepared by coupling N,N-diethyldithiocarbamoylmethylbenzoic acid succinimidyl ester with cystamine dihydrochloride. Block copolymerization of methacrylic acid (MA) and 2-methacryloyloxyethyl d-glucopyranoside (MEGlc) was performed by successive UV-irradiation in the presence of the iniferter and N,N,N‘,N‘-tetraethylthiuram disulfide. The block telomer formed a self-assembled monolayer (SAM) on a gold electrode and vacuum-evaporated gold thin film, as confirmed by cyclic voltammetry and infrared reflection−absorption spectroscopy (IRRAS), respectively. The pH-responsiveness of the MA telomer block on the gold surface and silver colloid was confirmed by contact angle and ζ-potential measurements, respectively. Recognition of glucose residues in the MEGlc block by a lectin (Concanavalin A) was followed on the gold surface and silver colloid by IRRAS and turbidity measurements, resp...