Creation of a ternary complex between a crown ether, 4-aminobenzoic acid and 3,5-dinitrobenzoic acid

Inclusion of 18-crown-6 into the co-crystallization of 3,5-dinitrobenzoic acid and 4-aminobenzoic acid results in the creation of a ternary complex. The enhanced match between the crown and the protonated form of 4-aminobenzoic acid directs the formation of the complex system.