Bis(nitrate)diaquauranyl(vi) synthon to generate [1 × 2 + 1 × 1] and [1 × 1 + 1 × 1] co-crystalized 3d⋯5f self-assemblies

Sagarika Bhattacharya, Suraj Mondal, Sujit Sasmal, Hazel A. Sparkes, Judith A.K. Howard, Malabika Nayak, Sasankasekhar Mohanta

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40 Scopus citations

Abstract

The syntheses, characterization and crystal structures of four copper(ii)/nickel(ii)⋯uranyl(vi) self-assemblies of composition [{Ni IIL1}2·{(UVIO 2)(NO3)2(H2O)2}] (1), [{CuIIL2}2·{(UVIO 2)(NO3)2(H2O)2}] ·0.68H2O (2), [{NiIIL2} 2·{(UVIO2)(NO3) 2(H2O)2}] (3) and [{CuIIL 3}·{(UVIO2)(NO3) 2(H2O)2}]n (4) are described in this investigation (H2L1, H2L2 and H2L3 are the Schiff base ligands obtained on condensing 3-ethoxysalicylaldehyde with ethylenediamine, o-phenylenediamine and trans-1,2-diaminocyclohexane, respectively). Compounds 1 and 4 crystallized in the monoclinic P21/n and C2/c space groups, respectively, while compounds 2 and 3 crystallized in the triclinic space group P1. Two water molecules of the [(UVIO2)(NO3) 2(H2O)2] moiety in 1-4, have a linear H 2O-U-OH2 arrangement. Each of these two water molecules in 1-3 interacts with the O(phenoxo)2O(ethoxy)2 compartment of a mononuclear copper(ii) or nickel(ii) moiety due to the formation of bifurcated hydrogen bonds between each of the two water hydrogen atoms and a pair of one phenoxo and one ethoxy oxygen atoms resulting in the interlinking of the two mononuclear 3d units by the [(UVIO2)(NO 3)2(H2O)2] synthon and therefore these three compounds may be considered as supramolecular dimers. Compounds 1-3 are also two component [1 × 2 + 1 × 1] co-crystals consisting of two mononuclear copper(ii) or nickel(ii) units and one [(UVIO 2)(NO3)2(H2O)2] moiety. On the other hand, in 4, two water molecules, from two different [(U VIO2)(NO3)2(H2O) 2] moieties, interact with one O(phenoxo)2O(ethoxy) 2 compartment resulting in the formation of a self-assembled one-dimensional topology. Again, since one mononuclear copper(ii) unit and one [(UVIO2)(NO3)2(H2O) 2] moiety exist in a single crystal in 4, this compound is a two component [1 × 1 + 1 × 1] co-crystal. The outcomes of the present study utilize [(UVIO2)(NO3)2(H 2O)2] synthon to derive 3d⋯5f co-crystals, provide the first observation of the interaction of two water molecules with one O(phenoxo)2O(ethoxy)2 compartment, demonstrate the formation of supramolecular dimers and show the first example of a one-dimensional self-assembly resulting from water⋯O4 compartment hydrogen bonds, and the first example of [1 × 2 + 1 × 1] co-crystals in 3-ethoxysalicylaldehyde-diamine ligand system.

Original languageEnglish
Pages (from-to)1029-1036
Number of pages8
JournalCrystEngComm
Volume13
Issue number3
DOIs
StatePublished - 7 Feb 2011
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry (all)
  • Materials Science (all)
  • Condensed Matter Physics

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