Solid state structures of the complexes between the antiseptic chlorhexidine and three anionic derivatives of calix[4]arene

The solid state structures of the complexes between antiseptic chlorhexidine and three anionic calix[4]arene derivatives are described. Each of the three calixarenes shows typical self-organisation in the solid-state that will further impose a specific complexation of the active molecule in the co-crystal.