© The Royal Society of Chemistry 2015. Solution mediated organization of p-sulfonatocalixarene, benzyltriphenylphosphonium cations, and bis(triethylammoniomethyl)-benzene dications in the solid state results in the ammonium dications preferentially binding in the cavities of two opposing calixarenes which take on a -3 charge, with the phosphonium cations arranged in a separate 2D sheet relative to the calixarene bilayer.
Ling, I., Sobolev, A., & Raston, C. L. (2015). Controlling the organization of phosphonium cations relative to p-sulfonatocalixarene anions. CrystEngComm, 17(7), 1526-1530. https://doi.org/10.1039/c4ce02086c