Heptacopper(II) and dicopper(II)-adenine complexes: synthesis, structural characterization, and magnetic properties
Abstract
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.
- Authors:
-
- 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
- Publication Date:
- Research Org.:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1334447
- Grant/Contract Number:
- AC05-00OR22725
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Coordination Chemistry
- Additional Journal Information:
- Journal Volume: 68; Journal Issue: 16; Journal ID: ISSN 0095-8972
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 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
Citation Formats
Leite Ferreira, B. J. M., Brandão, Paula, Dos Santos, A. M., Gai, Z., Cruz, C., Reis, M. S., Santos, T. M., and Félix, V. Heptacopper(II) and dicopper(II)-adenine complexes: synthesis, structural characterization, and magnetic properties. United States: N. p., 2015.
Web. doi:10.1080/00958972.2015.1061126.
Leite Ferreira, B. J. M., Brandão, Paula, Dos Santos, A. M., Gai, Z., Cruz, C., Reis, M. S., Santos, T. M., & Félix, V. Heptacopper(II) and dicopper(II)-adenine complexes: synthesis, structural characterization, and magnetic properties. United States. https://doi.org/10.1080/00958972.2015.1061126
Leite Ferreira, B. J. M., Brandão, Paula, Dos Santos, A. M., Gai, Z., Cruz, C., Reis, M. S., Santos, T. M., and Félix, V. Mon .
"Heptacopper(II) and dicopper(II)-adenine complexes: synthesis, structural characterization, and magnetic properties". United States. https://doi.org/10.1080/00958972.2015.1061126. https://www.osti.gov/servlets/purl/1334447.
@article{osti_1334447,
title = {Heptacopper(II) and dicopper(II)-adenine complexes: synthesis, structural characterization, and magnetic properties},
author = {Leite Ferreira, B. J. M. and Brandão, Paula and Dos Santos, A. M. and Gai, Z. and Cruz, C. and Reis, M. S. and Santos, T. M. and Félix, V.},
abstractNote = {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.},
doi = {10.1080/00958972.2015.1061126},
journal = {Journal of Coordination Chemistry},
number = 16,
volume = 68,
place = {United States},
year = {Mon Jul 13 00:00:00 EDT 2015},
month = {Mon Jul 13 00:00:00 EDT 2015}
}
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