Metal-Controlled Aggregation-Deaggregation in Calixarene-Based Self-Assemblies

Article abstract of DOI:10.1016/00404-0399(50)0908U-

Supramolecular self-assemblies of complementary components 1 or 2 (calix<4>arene derivatives with two or four 2,6-diaminopyridine units, respectively) and 3 (5,5-dialkyl barbituric acids) in chloroform-acetonitrile solution were confirmed by 1H NMR spectroscopy and light scattering.While derivative 1 interacts with 3 only after addition of Na(1+) cation, which disrupts intramolecular hydrogen bonds, compound 2 creates a complex with 3 even without the presence of Na(1+) cation, indicating much weaker intramolecular bonds in this derivative.