Cubic networks and 3⁶ tilings assembled from isostructural trimeric magnesium aryldicarboxylates

Issue title: Papers presented at the ‘Early Main Group Metal Chemistry’ symposium as part of the Pacifichem 2005 conference. Honolulu, Hawaii, December 15th- 20th, 2005.

Article type: Research Article

Authors: Rood, Jeffrey A. | Noll, Bruce C. | Henderson, Kenneth W.

Affiliations: Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana, USA

Note: [] Corresponding author. E-mail: [email protected]

Abstract: Two new metal-organic frameworks [{Mg3(bpdc)3·4DMF}⊃3.8DMF] (1), and [Mg3(bdc)3·4DMSO] (2) have been synthesized by the high temperature equimolar reactions of magnesium nitrate with the appropriate dicarboxylic acid in either neat DMF or mixed DMF/DMSO solutions (where bpdcH2=4,4′-biphenyldicarboxylic acid and bdcH2=1,4-benzenedicarboxylic acid). The crystal structures of 1 and 2 were determined by X-ray analyses and found to be similarly composed of linked trimeric secondary building units. The trimers in 1 act as distorted octahedral nodes to produce a three-dimensional cubic network with guest DMF molecules trapped within square channels. In contrast, the trimeric SBUs in 2 act as pseudoplanar-hexagonal nodes to give an unusual 36 two-dimensional network assembly. Compound 1 is potentially porous and thermogravimetric analysis is consistent with the initial loss of guest DMF and framework-bound DMF in two steps between 68 – 330°C, with decomposition of the material at 580°C.

Keywords: Magnesium, Metal-organic frameworks, Network topology

DOI: 10.1080/10241220600815718

Journal: Main Group Chemistry, vol. 5, no. 1, pp. 21-30, 2006