Synthesis of a Series of Oligo(ethylene glycol)-Terminated Alkanethiol Amides Designed to Address Structure and Stability of Biosensing Interfaces
作者:Sofia Svedhem、Carl-Åke Hollander、Jing Shi、Peter Konradsson、Bo Liedberg、Stefan C. T. Svensson
DOI:10.1021/jo0012290
日期:2001.6.1
oligo(ethylene glycols) with up to 12 units were prepared. Selective monoacylation of the symmetrical tetra- and hexa(ethylene glycol) diols as their mesylates with the use of silver(I) oxide was performed. The synthetic approach was based on carbodiimide couplings of various oligo(ethylene glycol) derivatives to omega-(acetylthio) carboxylic acids via a terminal amino or hydroxyl function. SAM structures on gold
一系列密切相关的寡聚(乙二醇)末端链烷硫醇酰胺(主要是HS(CH(2))(m)CONH(CH(2)CH(2)O)(n)H; m的合成策略= 2、5、11、15,n = 1、2、4、6、8、10、12),并且已经开发出类似的酯。制备这些化合物是为了研究金上自组装单分子膜(SAMs)的结构和稳定性,以期设计出新的生物传感界面。为此,制备了具有多达12个单元的单分散性杂官能低聚(乙二醇)。使用氧化银(I)对对称的四和六(乙二醇)二醇作为甲磺酸酯进行选择性单酰化。合成方法基于各种低聚(乙二醇)衍生物的碳二亚胺通过末端氨基或羟基官能团与ω-(乙酰硫基)羧酸的偶联。研究了金的SAM结构的厚度,润湿性(水接触角约为30度)和构象。对于单层厚度(d)与低聚(乙二醇)链中单元数(n)之间的关系,获得了很好的拟合:d = 2.8n + 21.8(A)。有趣的是,相应的红外光谱分析表明寡聚链的构象从全反式(n =