D'Alessio, Daniel Skelton, Brian W. Lengkeek, Nigel A. Fraser, Benjamin H. Krause-Heuer, Anwen M. Muzzioli, Sara Stagni, Stefano Massi, Massimiliano Ogden, Mark I. Ionophoric properties of a tetra-tetrazole functionalised calix[4]arene <p>The synthesis and characterisation of <i>p</i>-<i>t</i>-butylcalix[4]arene functionalised at the lower rim with four tetrazole moieties is reported. The macrocycle is found to be a poorer ionophore for lanthanoid cations than the bis-tetrazole–substituted analogue. Solution-phase photophysical studies strongly suggested that the cations interacted only weakly with the calixarene ligand. A mixed sodium/triethylammonium salt of the calixarene ligand was crystallised in the presence of lanthanoid cations and structurally characterised. Strong intramolecular interactions are hypothesised to be the cause of the observed behaviour.</p> calixarene;tetrazole;lanthanide;crystal structure 2015-11-26
    https://tandf.figshare.com/articles/journal_contribution/Ionophoric_properties_of_a_tetra_tetrazole_functionalised_calix_4_arene/1583298
10.6084/m9.figshare.1583298.v2