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  • Title: A tetranuclear Cu(II)-based 2D aggregate with an unprecedented tetradentate mu(4)-N1,N3,N7,N9-adeninate nucleobase.
    Author: Yang EC, Zhao HK, Feng Y, Zhao XJ.
    Journal: Inorg Chem; 2009 Apr 20; 48(8):3511-3. PubMed ID: 19284760.
    Abstract:
    A unique tetranuclear Cu(II)-based 2D aggregate containing 26-membered Cu(II)ade macrocycles, [Cu(4)(DMF)(6)(mu(4)-ade)(2)(mu(2)-Cl)(2)Cl(4)](n) (1; Hade = adenine, DMF = N,N-dimethylformamide), was isolated by the reaction of CuCl(2) and Hade in a mixed DMF-methanol medium and structurally characterized by X-ray crystallography, elemental analysis, Fourier transform infrared, fluorescence spectroscopy, and thermogravimetry-differential thermal analysis techniques. Unexpectedly, the adeninate in 1 represents an unprecedented tetradentate mu(4)-N1,N3,N7,N9-bridging mode, which significantly contributes to both the aggregate of four Cu(II) cores within the subunit and the extension of the 2D covalent framework. Additionally, 1 displays the intense Hade-based fluorescence emission in solution at room temperature.
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