A 1H NMR study on the complexation of tetraalkylammonium cations, mono and diprotonated amines, and amino acids with a derivatized cyclotetrachromotropylene in an aqueous solution

The derivatized cyclotetrachromotropylene host forms complexes of 1:1 host to guest stoichiometry with tetraalkylammonium cations and amino acids whereas complexes of 1:2 host to guest stoichiometry are formed with mono and diprotonated amines in an aqueous solution. Both electrostatic and hydrophobic interactions are involved in the complexation.