杯芳烃形成俄罗斯套娃结构的分子 Diffusion-ordered1HNMR spectroscopytechniqueshavebeen usedtodeterminethebindingstrength ofp-sulfonatocalix[4]arene(SO3[4])towards anumberofchargedcrown etherspeciesinaqueousconditions. Forseveral(doubly)charged(di)azacrown ethers,allwereboundbySO3[4] eit