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Issue 38, 2010
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Stabilization of acyclic water tetramer in a copper(II) malonate framework structure

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Abstract

Copper(II) complex [Cu(dpq)(mal)(H2O)]·3H2O (1) (dpq = dipyrido-[3,2-d:2′,3′-f]-quinoxaline, mal = malonato) was synthesized and characterized by elemental analysis, infrared spectroscopy, thermogravimetric analysis and single-crystal X-ray crystallography. The single-crystal X-ray structure of 1 reveals a square pyramidal structure, with the dipyrido-[3,2-d:2′,3′-f]-quinoxaline and malonato at the equatorial positions and a water molecule at the axial position. The molecule acts as a building block generating a supramolecular three-dimensional metal–organic framework (MOF) encapsulating metal linked acyclic water tetramer. The H-bonding capacity of malonato and the π–π stacking interactions of dipyrido-[3,2-d:2′,3′-f]-quinoxaline further reinforce the framework. The copper(II) bound hydroxyl group is demonstrated to mediate hydrolytic cleavage of plasmid pBR322 DNA under dark conditions.

Graphical abstract: Stabilization of acyclic water tetramer in a copper(ii) malonate framework structure

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Publication details

The article was received on 24 Mar 2010, accepted on 25 Jun 2010 and first published on 27 Aug 2010


Article type: Paper
DOI: 10.1039/C0DT00672F
Citation: Dalton Trans., 2010,39, 9146-9152
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    Stabilization of acyclic water tetramer in a copper(II) malonate framework structure

    M. S. Deshpande, A. S. Kumbhar and C. Näther, Dalton Trans., 2010, 39, 9146
    DOI: 10.1039/C0DT00672F

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