Trapping of Organophosphorus Chemical Nerve Agents in Water with Amino Acid Functionalized Baskets
作者:Yian Ruan、Erdin Dalkiliç、Paul W. Peterson、Aroh Pandit、Arif Dastan、Jason D. Brown、Shane M. Polen、Christopher M. Hadad、Jovica D. Badjić
DOI:10.1002/chem.201304779
日期:2014.4.7
We prepared eleven amino‐acidfunctionalizedbaskets and used 1H NMR spectroscopy to quantify their affinity for entrapping dimethyl methylphosphonate (DMMP, 118 Å3) in aqueous phosphate buffer at pH=7.0±0.1; note that DMMP guest is akin in size to chemicalnerveagent sarin (132 Å3). The binding interaction (Ka) was found to vary with the size of substituent groups at the basket′s rim. In particular
我们制备了11个氨基酸的官能篮和用于1 H NMR光谱量化其亲和力截留甲基膦酸二甲酯(DMMP,118埃3在水性磷酸盐缓冲液),在pH = 7.0±0.1; 需要注意的是DMMP客人类似于大小与化学神经毒剂沙林(132 3)。结合相互作用(K a)被发现随着篮子边缘的取代基的大小而变化。特别是,每个取代基的第一个碳原子的支化程度对主客体相互作用的影响最大,如Verloop的B1位阻参数所述。然而,在偏远碳原子上的分支并没有干扰封装,这对于指导将来设计更有效的主体和催化剂很重要。