title: A tetranuclear Cu(II)-based 2D aggregate with an unprecedented tetradentate mu(4)-N1,N3,N7,N9-adeninate nucleobase.
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.
authors.affiliation: College of Chemistry and Life Science, Tianjin Key Laboratory of Structure and Performance for Functional Molecule, Tianjin Normal University, Tianjin 300387, People's Republic of China.
authors.forename: En-Cui
authors.initials: EC
authors.lastname: Yang
authors.forename: Hong-Kun
authors.initials: HK
authors.lastname: Zhao
authors.forename: Yan
authors.initials: Y
authors.lastname: Feng
authors.forename: Xiao-Jun
authors.initials: XJ
authors.lastname: Zhao
mesh_terms: D000225:Adenine / Q000737:chemistry*; D003300:Copper / Q000737:chemistry*; D018360:Crystallography, X-Ray; D004126:Dimethylformamide / Q000737:chemistry; D008958:Models, Molecular; D009942:Organometallic Compounds / Q000138:chemical synthesis / Q000737:chemistry*
chemical_list: D009942:Organometallic Compounds; D003300:Copper; D004126:Dimethylformamide; D000225:Adenine