The solid-state structures of para-sulphonatocalix[4]arene with the biologically active oligoammonium cations of norspermidine and triethyltetramine

Solid-state complexes between para-sulphonatocalix[4]arene and a wide variety of organic cations, especially those containing amino groups are studied due to their potential applications. The structures of the complexes between para-sulphonatocalix[4]arene and norspermidine and triethyltetramine show the expected hydrogen bonding interactions between the ammonium and sulfonate groups.