Heptacopper(II) and dicopper(II)-adenine complexes: synthesis, structural characterization, and magnetic properties

Leite Ferreira, B. J. M.; Brandão, Paula; Dos Santos, A. M.; Gai, Z.; Cruz, C.; Reis, M. S.; Santos, T. M.; Félix, V.

doi:10.1080/00958972.2015.1061126

Title: Heptacopper(II) and dicopper(II)-adenine complexes: synthesis, structural characterization, and magnetic properties

Journal Article · Mon Jul 13 00:00:00 EDT 2015 · Journal of Coordination Chemistry

DOI:https://doi.org/10.1080/00958972.2015.1061126· OSTI ID:1334447

Leite Ferreira, B. J. M. ^[1]; Brandão, Paula ^[2]; Dos Santos, A. M. ^[3]; Gai, Z. ^[4]; Cruz, C. ^[5]; Reis, M. S. ^[5]; Santos, T. M. ^[1]; Félix, V. ^[6]

Univ. of Aveiro (Portugal). Dept. of Chemistry
Univ. of Aveiro (Portugal). Dept. of Mechanical Engineering
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Quantum Condensed Matter Division
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences
Federal Fluminense Univ., Niteroi (Brazil). Inst. of Physics
Univ. of Aveiro (Portugal). Dept. of Chemistry and Dept. of Health Sciences

The syntheses, crystal structures, and magnetic properties of two new copper(II) complexes with molecular formulas [Cu₇(μ₂-OH₂)₆(μ₃-O)₆(adenine)₆(NO₃)₂6H₂O (1) and [Cu₂(μ₂-H₂O)₂(adenine)₂(H₂O)₄](NO₃)₄2H₂O (2) are reported. We composed the heptanuclear compound 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 d⁹ center. Our 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.

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Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1334447

Journal Information:: Journal of Coordination Chemistry, Vol. 68, Issue 16; ISSN 0095-8972

Country of Publication:: United States

Language:: English

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Cited by: 13 works

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Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
Heptacopper(II)
Dicopper(II)
Copper cluster
Adenine complexes
Magnetic properties
DINUCLEAR COPPER(II) COMPLEX
ARENE INCLUSION COMPLEXATION
CRYSTAL-STRUCTURE
COORDINATION POLYMERS
BUILDING-BLOCKS
DNA-BINDING
HEPTANUCLEAR
TETRANUCLEAR
CLUSTER