Synthesis and characterization of decanuclear Ln(III) cluster of mixed calix[8]arene-phosphonate ligands (Ln = Pr, Nd)

Abstract

Two novel decanuclear Ln(III) compounds (Ln = Pr for 1, Nd for 2) have been solvothermally obtained by using p-tert-butylcalix[8]arene (H8TBC8A) and phenylphosphonate (PhPO3H2) as ligands. Single crystal X-ray diffraction studies reveal that both compounds are stacked by dumbbell-like Ln10 clusters, which are capped by two TBC8A8 - supports and linked by four complementary PhPO32 - ligands as well as other bridging anions. In addition, the self-assembly behavior of both compounds is interesting: the cationic Ln10 cluster layers are separated by the layers of H6TBC8A2 - ligands. Moreover, the luminescent and magnetic properties of both compounds were examined.