p-Sulfonatocalix[4]arene binding of monovalent, divalent and trivalent metal ions

Irene Ling, Alexandre N. Sobolev, Colin L. Raston

    Research output: Contribution to journalArticlepeer-review

    Abstract

    Structural studies on p-sulfonatocalix[4]arene coordination compounds involving diverse metal ions with respect to their size and charge, caesium(I), copper(II) and neodymium(III) are reported. The metal coordination-driven self-assembly forms metallosupramolecules, either as a two-dimensional (2 D) or a three-dimensional (3D) network while retaining the commonly established bilayer array for p-sulfonatocalix[4]arene. The complex (Cs5-p-sulfonatocalix[4]arene-H+)·6H2O has five crystallographically independent caesium(I) ions with high coordination numbers. In the divalent complex {[Cu3(H2O)12-2(p-sulfonatocalix[4]arene)]2-}·2([Cu(H2O)5])2+·2NO3-·7H2O, two different copper(II) coordination environments are present, one with octahedral stereochemistry while bridging two opposing calixarenes with the other having a square pyramidal geometry involving one sulfonate group. Eight-coordinate neodymium(III) metal ions prevail in Nd0.25(H2O)1.25(p-sulfonatocalix[4]arene + H+)0.25, involving four sulfonate groups from four different calixarenes.

    Original languageEnglish
    Pages (from-to)40-50
    Number of pages11
    JournalJournal of Coordination Chemistry
    Volume74
    Issue number1-3
    DOIs
    Publication statusPublished - 2021

    Keywords

    • coordination
    • metal
    • p-Sulfonatocalix[4]arene

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