Tashev, EmilAtanassova, MariaVarbanov, SabiTosheva, TaniaShenkov, StoychoChauvin, Anne-SophieDukov, Ivan2010-11-302010-11-302010-11-30200810.1016/j.seppur.2008.09.011https://infoscience.epfl.ch/handle/20.500.14299/60710WOS:000262325000005A new lower rim substituted calix[8]arene bearing eight phosphine oxide moieties has been synthesized. The structure of 5,11,17,23,29,35,41,47-octa(1,1,3,3-tetramethylbutyl)-49,50,51,52,53,54,55,56-octakis(dimethylphosphinoylmethyleneoxy)calix[8]arene (S) was identified and confirmed by elemental analysis, IR-, H-1, C-13 and P-31-{H-1} NMR spectroscopy as well as by ES-mass spectrometry.Phosphorus-containing calix[8]areneSynergistic solvent extractionLanthanoids4-Benzoyl-3-methyl-1-phenyl-5-pyrazolonePhosphinoyl Pendant ArmsTrivalent LanthanoidsCalixarenesComplexesMixturesLanthanidesAliquat-336IonsRimtext::journal::journal article::research article