Cationites Based on Calix[4]resorcinarene Derivatives

Modeling of cation diffusion in bifunctional polymers based on cis-tetraphenylcalix[4]resorcinarene

“…As was previously reported in [5], monofunctional polymer 1, includes only weakly acidic phenol -OH groups. Bifunctional polymer 2 contains strongly acidic -SO3H groups which dissociate with the formation of free protons over a wide pH range (0-14), and weakly acidic phenol OH groups.…”

“…Polymer 1 was produced by resol polycondensation of cis-tetraphenylcalix [4]resorcinarene with formaldehyde as spherical granules of an adjustable size [4,5]. Polymer 2 was produced by sulfonatation of polymer 1 according to the procedure [7].…”

“…For realizing its properties cis-tetraphenylcalix [4]resorcinarene was immobilized into the phase of network polymers. New network functional polymers were synthesized by immobilization of calix [4]arenes on cross-linked polysterene [3] and by catalytic resol polycondensation of cis-tetraphenylcalix [4]resorcinarene derivatives with formaldehyde [4][5][6][7]. It was shown that immobilized cis-tetraphenylcalix [4]resorcinarenes are nanoreactors for catalytic hydrogenation processes [8], solid polyelectrolytes [9], cation exchangers [4,10,11] and biomemetics, the latter making it possible to consider the processes occurring in biological polymer systems [12,13] at the molecular level.…”

Thermodynamics of ion exchange of H+ by Na+ or NH4 + on ion-exchange resins based on C-tetramethylcalix[4]resorcinarene

“…Logarithms of the corrected selectivity coefficient of ion exchange of H + by NH 4 + in cation exchange resins 1a (1) and 1b(2) and of H + by Na + in cation exchange resins 1a (3) and 1b (4) vs. molar fraction of ions NH 4 + or Na + in the cation exchange resins at 298 Differential enthalpies of the ion exchange of H + by NH 4 + in 1a (1) and 1b(2) and of H + by Na + in 1a (3) and 1b (4) vs. molar fraction of ions NH4 + or Na + in the cation exchange resins at 298 K.…”

“…The total ion exchange capacity of the calix containing ion exchange resins with 0.1 M NaOH corre sponds to the substitution of four protons in one calix resorcinarene fragment of the polymer. 2 The purpose of this work is to consider from the ther modynamic viewpoint the sorption of Na + and NH 4 + cations by cation exchange resins based on C tetramethyl calix [4]resorcinarene and, specifically, in the reaction , (1) where the line refers to the component in the polymeric phase; Cat + is the Na + or NH 4 + cation, and is cation exchange resin 1a or 1b in the H form. To solve the problem, we obtained the data on the equilibrium com positions of the phases and derived the selectivity of ion exchange reactions.…”