gsch_a_1075536_sm9901.pdf (785.87 kB)
Ionophoric properties of a tetra-tetrazole functionalised calix[4]arene
Version 2 2015-11-26, 20:33
Version 1 2015-11-26, 20:33
journal contribution
posted on 2015-11-26, 20:33 authored by Daniel D'Alessio, Brian W. Skelton, Nigel A. Lengkeek, Benjamin H. Fraser, Anwen M. Krause-Heuer, Sara Muzzioli, Stefano Stagni, Massimiliano Massi, Mark I. OgdenThe synthesis and characterisation of p-t-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.