Heptacopper(II) and dicopper(II)-adenine complexes: synthesis, structural characterization, and magnetic properties
authors Ferreira, BJML; Brandao, P; Dos Santos, AM; Gai, Z; Cruz, C; Reis, MS; Santos, TM; Felix, V
nationality International
journal JOURNAL OF COORDINATION CHEMISTRY
author keywords Heptacopper(II); Dicopper(II); Copper cluster; Adenine complexes; Magnetic properties
keywords DINUCLEAR COPPER(II) COMPLEX; ARENE INCLUSION COMPLEXATION; CRYSTAL-STRUCTURE; COORDINATION POLYMERS; BUILDING-BLOCKS; DNA-BINDING; HEPTANUCLEAR; TETRANUCLEAR; CLUSTER; CORE
abstract The syntheses, crystal structures, and magnetic properties of two new copper(II) complexes with molecular formulas [Cu-7((2)-OH2)(6)((3)-O)(6)(adenine)(6)](NO3)(2)6H(2)O (1) and [Cu-2((2)-H2O)(2)(adenine)(2)(H2O)(4)](NO3)(4)2H(2)O (2) are reported. The heptanuclear compound is composed of a central octahedral CuO6 core sharing edges with six adjacent copper octahedra. In 2, the copper octahedra shares one equatorial edge. In both compounds, these basic copper cluster units are further linked by water bridges and bridging adenine ligands through N3 and N9 donors. All copper(II) centers exhibit Jahn-Teller distorted octahedral coordination characteristic of a d(9) center. The study of the magnetic properties of the heptacopper complex revealed a dominant ferromagnetic intra-cluster interaction, while the dicopper complex exhibits antiferromagnetic intra-dimer interactions with weakly ferromagnetic inter-dimer interaction.
publisher TAYLOR & FRANCIS LTD
issn 0095-8972
year published 2015
volume 68
issue 16
beginning page 2770
ending page 2787
digital object identifier (doi) 10.1080/00958972.2015.1061126
web of science category Chemistry, Inorganic & Nuclear
subject category Chemistry
unique article identifier WOS:000359822900003
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