Title:Water Soluble Molecular Capsules via Multiple Ionic Interactions
VOLUME: 10 ISSUE: 2
Author(s):Reza Zadmard, Hajar Entezari, Parinaz Ataeian and Maryam Mirza-Aghayan
Affiliation:Chemistry and Chemical Engineering Research Center of Iran, Postal Code: 1496813151, Tehran– Iran.
Keywords:Association constant, Calix[4]arene, ESI-MS, ITC, molecular capsule
Abstract:In this paper we introduced the formation of a novel type of capsules resulting from the self-association between
oppositely charged complementary building blocks in H2O. The assembly is based on the interaction between tetraphosphonatcalix[4]arenes 1 and tetraammonium calix[4]arene 2 and 3. Evidence for the formation of the expected 1:1 assemblies
is provided by ESI-MS. Isothermal titration calorimetry (ITC) was carried out to measure the enthalpy and entropy
of complex formation for capsule 1+3, with association constants in the range of 106 M-1.
