Lanthanide cation binding properties of homooxacalixarene diethylamide derivatives

An Enchiridion of Supramolecular Thermodynamics: Calix[N]arene (N=4,5,6) Tertiary Amide Derivatives and their Ionic Recognition

“…If this effect is observed, 60,61 other processes besides complexation are taking place in solution. As a result, the data should be referred to as 'apparent' data where ions and ion pairs are present in solution.…”

“…Under the umbrella of thermodynamics, stability constants, enthalpies and entropies of complexation in methanol were reported. 61 Given that these data are dependent on the counter-ion, the data reported are considered as 'apparent' values where besides complexation other processes are taking place as previously discussed.…”

Utilizing electronic effects in the modulation of BTPhen ligands with respect to the partitioning of minor actinides from lanthanides

“…NMR spectroscopic titrations of ligands with diamagnetic metal salts were used to determine the stoichiometries of the complexes in solution. [18][19][20][21] NMR titrations of the C5-BTPhen 7a with a number of trivalent lanthanide (lanthanum and lutetium) salts were thus performed in deuterated acetonitrile (CD 3 CN). La(III) (ionic radius = 116 pm) 15 and Lu(III) (ionic radius = 98 pm) 15 were chosen to give the greatest difference in of the Ln(III) radius.…”

Dinuclear lanthanide complexes supported by a hybrid salicylaldiminato/calix[4]arene-ligand: synthesis, structure, and magnetic and luminescence properties of (HNEt3)[Ln2(HL)(L)] (Ln = SmIII, EuIII, GdIII, TbIII)

“…There are only very few studies reporting thermodynamic data for f-element calixarene complexes in non-aqueous solvents. [93][94][95][96] Danil de Namor and Jafour have studied the complexation of trivalent cations by p-tert-butylcalix [4]arene tetraethanoate, p-tert-butylcalix [4]arene tetramethyl ketone, and p-tert-butylcalix [4]arene tetraacetamide in acetonitrile. 97 Borisova and co-workers have determined stability constants for lanthanide complexes supported by 2,2′-bipyridyl-6,6′-dicarboxylic acid diamide and 2,6-pyridinedicarboxylic acid diamide ligands in the same solvent.…”