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Issue 45, 2011
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Synthesis, structure and host-guest properties of (Et4N)2[SnIVCaII(chloranilate)4], a new type of robust microporous coordination polymer with a 2D square grid structure

Brendan F. Abrahams,*a  Martin J Grannas,a  Timothy A. Hudson,a  Steven A. Hughes,a  Naomi H. Pranotoa  and  Richard Robson*a 
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* Corresponding authors

a School of Chemistry, University of Melbourne, Victoria, Australia
E-mail: r.robson@unimelb.edu.au;bfa@unimelb.edu.au
Fax: +61 3 9347 5180, +61 3 9347 5180
Tel: +61 3 8344 6469, +61 3 8344 0341

Abstract

Reaction of chloranilic acid with SnCl4, Ca(NO3)2 and Et4NBF4 in aqueous acetone yields (Et4N)2[SnIVCaII(can)4]. 2 Me2CO which contains 2D coordination polymer sheets of composition [SnIVCaII(can)4]2−. Both metals are 8-coordinate and act as 4-connecting nodes to form a square grid containing “square” holes. The anionic sheets are electrostatically bound together by Et4N+ cations, which align the sheets so that holes are arranged directly above and below each other, generating channels perpendicular to the sheets. The acetone is easily removed, after which single crystal character is retained. Crystallographic studies indicate that (Et4N)2[SnIVCaII(can)4] is able to sorb one molecule per square hole of either acetonitrile, or CS2. Gas sorption measurements indicate that at a pressure of 2000 kPa each square cavity sorbs two CO2 molecules at 273 K, approximately one molecule of N2 at 195 K and approximately 2.4 molecules of H2 at 77 K.

Graphical abstract: Synthesis, structure and host-guest properties of (Et4N)2[SnivCaii(chloranilate)4], a new type of robust microporous coordination polymer with a 2D square grid structure

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Publication details

The article was received on 23 May 2011, accepted on 28 Jul 2011 and first published on 14 Sep 2011


Article type: Paper
DOI: 10.1039/C1DT10962F
Citation: Dalton Trans., 2011,40, 12242-12247
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    Synthesis, structure and host-guest properties of (Et4N)2[SnIVCaII(chloranilate)4], a new type of robust microporous coordination polymer with a 2D square grid structure

    B. F. Abrahams, M. J. Grannas, T. A. Hudson, S. A. Hughes, N. H. Pranoto and R. Robson, Dalton Trans., 2011, 40, 12242
    DOI: 10.1039/C1DT10962F

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