The formation and characterization of molecular capsules resulting from the self-assembly between oppositely charged (thia)calix[4]arenes in polar solvents like MeOH and MeOH–H2O are reported. The multiple ionic interactions allow the self-assembly of the complementary (thia)calix[4]arenes 1 and 2a–d into 1∶1 complexes as revealed by 1H NMR and mass spectrometry (ESI-MS). Isothermal titration calorimetry (ITC) was used to determine the association constants, which, depending on the ionic groups involved in the complexes, vary between 103 and 106 M−1. An X-ray structure of the assembly 1•2d was also obtained. Unlike in solution, in the solid state 1•2d forms a 1∶1 three-dimensional network in which 2d adopts a 1,2-alternate conformation.
报告了带相反电荷的(
硫杂)杯[4]
芳烃在
甲醇和
甲醇-
水等极性溶剂中自组装产生的分子胶囊的形成和表征。 1H NMR 和质谱 (ESI-MS) 表明,多重离子相互作用使得互补的 (thia)calix[4]
芳烃 1 和 2a-d 自组装成 1:1 复合物。等温滴定量热法 (ITC) 用于确定缔合常数,根据配合物中涉及的离子基团,缔合常数在 103 到 106 M−1 之间变化。还获得了组件1•2d的X射线结构。与溶液不同,在固态中1•2d 形成1∶1 三维网络,其中2d 采用1,2-交替构象。