Ethylene spacer-linked <i>bis</i>-acetamidopyridine for dicarboxylic acid recognition and polymeric new wave-like <i>anti</i>-<i>perpendicular</i> arrangement of a host–guest in the solid state
作者:Shyamaprosad Goswami、Nirmal Kumar Das、Debabrata Sen、Hoong-Kun Fun
DOI:10.1080/10610278.2010.497208
日期:2010.9.1
significant binding constants are observed, which thus unambiguously support the complexation of receptor 1 with dicarboxylic acids in solution. Receptor 2, simple 2-acetamido-6-methylpyridine, has lower binding constants than receptor 1 due to cooperative binding of two pyridine amide groups with two acid groups of diacids. In the solid phase, the ditopic receptor 1 shows a grid-like polymeric hydrogen-bonded
在这篇论文中,1,2-双(2-乙酰氨基-6-吡啶基)乙烷受体 1 具有乙烯间隔基,据报道可以识别二羧酸。溶液相中的结合研究使用 1H NMR (1:1) 和 UV-vis 实验进行,固相中的结合研究通过单晶 X 射线分析进行。在 1H NMR 中,受体 1 的特定酰胺质子在受体和客体二酸的 1:1 复合物中发生低场位移,在 UV-vis 实验中,观察到等吸收点的出现以及显着的结合常数,因此明确支持受体 1 与溶液中二羧酸的络合。受体 2,简单的 2-乙酰氨基-6-甲基吡啶,由于两个吡啶酰胺基团与二酸的两个酸基团的协同结合,具有比受体 1 低的结合常数。在固相中,