Host–Guest complexation process of calixarenehydroxymethylphosphonic acids with 10 amino acids in solution H2O/MeCN (99:1) had been studied. Binding constants of the inclusion complexes from the dependence between capacity factors of the Guest and the calixarene-Host concentration in the mobile phase had been calculated. It was shown the binding constants depend on the nature of the amino acid residue, conformation of the calixarene skeleton, quantity of phosphoryl groups at the upper rim. In accordance with molecular calculation the complexation is determined by the electrostatic interactions between the positively charged nitrogen atom of amino acid and the negatively charged oxygen atom of phosphonic group of calixarene molecule, hydrogen bonds, π–π, CH–π and solvatophobic, interactions.
研究了在
H2O/MeCN 溶液(99:1)中卡利沙雷因
羟甲基膦酸与 10 种
氨基酸的主客体络合过程。根据客体的容量因子与流动相中
钙沙雷因-客体浓度之间的关系,计算出了包合物的结合常数。结果表明,结合常数取决于
氨基酸残基的性质、卡利卡林骨架的构象以及上缘
磷酰基团的数量。根据分子计算结果,
氨基酸带正电荷的氮原子与
钙铝烯烃分子带负电荷的膦基氧原子之间的静电作用、氢键、π-π、CH-π 和疏溶作用决定了复合物。