93503-77-6Relevant articles and documents
Path to Industrial Production of Calix[8 and 4]arenes
Haase, Cornelius Heinz Werner
, p. 603 - 611 (2020/02/04)
A highly selective and high yield synthesis for the production of calix[8]arenes in concentrated reaction masses is described. Obtained purities are >98% and yields of >80%, with isolation by simple filtration. The developed approach allows for subsequent
Cation Transport from Multiple Alkali Cation Mixtures Using a Liquid Membrane System Containing a Series of Calixarene Carriers
Izatt, Steven R.,Hawkins, Richard T.,Christensen, James J.,Izatt, Reed M.
, p. 63 - 66 (2007/10/02)
Several new p-tert-pentylcalixarenes have been synthesized.These and other calixarenes have been used to study carrier-mediated alkali-metal cation fluxes at 25 deg C in H2O-(organic solvent)-H2O liquid membranes.In addition to single cation systems, all possible equimolar, two-, three-, and four-cation mixtures of NaOH, KOH, RbOH, and CsOH were used in the study.In each case, alkali cation transport was coupled with the reverse flux of protons.Selective transport of Cs(1+) over Rb(1+), K(1+), and Na(1+) was seen in all mixtures studied.The greatest selectivity for Cs(1+) was found for calixarenes, but the largest flux of Cs(1+) as well as the other alkali cations was seen with the calixarenes and calixarenes.The greater flux in these latter cases may be a result of each calixarene binding two cations.In experiments at low -to- ratios, p-tert-butylcalixarene transports Rb(1+) over Cs(1+).As these ratios increase, transport of Cs(1+) becomes favored over that of Rb(1+), indicating that the cation flux depends, in part, on the relative concentrations of the cations in the source phase.
