Specific Binding of Primary Ammonium Ions and Lysine-Containing Peptides in Protic Solvents by Hexahomotrioxacalix[3]arenes
作者:Simon Lambert、Kristin Bartik、Ivan Jabin
DOI:10.1021/acs.joc.0c01294
日期:2020.8.7
H-bonds with the ethereal macrocycle. The remarkable electronic, size, and shape complementarity between primary ammonium ions and the two cavity-based receptors leads to an unprecedented specificity for primary ammonium ions over secondary, tertiary, and quaternary ones. These binding properties were exploited for the selective liquid–liquid extraction of primary ammonium salts from water and for the
使用NMR光谱法和计算机模拟方法研究了两个基于草胺磷[3]亚芳基的受体对铵离子的结合。即使在质子环境中,这两种受体也显示出内在复杂的多种初级铵离子,包括生物分子。对于所有来宾,氨离子深深插入多环芳族腔及其NH 3 +头几乎在18-crown-3部分的三个氧原子所定义的平面内,因此使其能够与醚大环建立三个H键。伯铵离子与两个基于空穴的受体之间的显着电子,大小和形状互补性,导致伯铵离子相对于仲,叔和季铵离子具有前所未有的特异性。这些结合特性被用于从水中选择性地液-液萃取伯铵盐,以及选择性识别含赖氨酸的肽,为肽传感领域开辟了新的前景。