Issue 45, 2011

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

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

Supplementary files

Article information

Article type
Paper
Submitted
23 May 2011
Accepted
28 Jul 2011
First published
14 Sep 2011

Dalton Trans., 2011,40, 12242-12247

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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