Organically Directed Bimetallic Sulfates Based on the Radii and Coordination Number: Synthesis, Structure and Characterization

A series of organically directed bimetallic sulfates with one- and two-dimensional structures have been synthesized hydrothermally. The 2D structures with formulas (C2H10N2)2[FeIII2FeII(SO4)6(H2O)4]·2H2O, I, (C2H10N2)2[FeIII2CdII(SO4)6(H2O)4]·2H2O, II, and (C2H10N2)2[FeIII2NiII(SO4)6(H2O)4]·2H2O, III, have identical brick-wall layers constructed from infinite ferrinatrite-type {Fe2(SO4)3}n chains jointed by transition metal ions M2+ (M = Fe, Cd, Ni); the 1D structures with the compositions [C2N2H10][Fe3O(SO4)6La(H2O)6]·3H2O, IV, [C2N2H10][Fe3O(SO4)6Ce(H2O)6]·3H2O, V, and [C4N2H12]1.5[Fe3O(SO4)6Cd(H2O)5]·2H2O, VI, possess sulfated trinuclear iron oxo clusters that are interconnected by Ln3+ or Cd2+cations to extended straight or zigzag chains. The assembly of iron sulfate, resulting from the increase of the radii and coordination numbers of second metal centers, was modulated to afford a 1D chain or 0D cluster and further extended to form distinct 2D layer or 1D cluster-containing chain. The magnetic measu...