Recognition and Sensing of Biologically Relevant Anions in Alcohol and Mixed Alcohol–Aqueous Solutions Using Charge Neutral Cleft-Like Glycol-Derived Pyridyl–Amidothiourea Receptors
作者:Rebecca M. Duke、Thomas McCabe、Wolfgang Schmitt、Thorfinnur Gunnlaugsson
DOI:10.1021/jo202332h
日期:2012.4.6
the synthesis and the spectroscopic investigation of new colorimetric receptors for anions 3–6, possessing a glycol chain at the 4-position of the pyridyl ring, and 1 and 2, which lack such a chain, and the X-ray crystal structure of 2 is presented. Structures 3–6 are able to bind to anions in competitive media, such as alcohol or in a mixture of methanol and water, where the anion recognition gives rise
在本文中,合成和光谱研究的新的比色受体阴离子3 - 6,在吡啶环的4-位具有一个乙二醇链,和1和2,其缺少这样的链,并且所述X射线呈现2的晶体结构。结构3 – 6能够与竞争性介质(例如酒精或甲醇和水的混合物)中的阴离子结合,其中阴离子的识别会引起吸收光谱的变化,吸收光谱发生红移,呈1:1或1:2(传感器/阴离子)化学计量比。1和2的阴离子识别在有机溶剂和DMSO / H 2 O的4:1混合物中也研究了1H 。在DMSO- d 6中使用1 H NMR还评估了1与阴离子如乙酸根,磷酸根和氟的结合。