Modular [FeIII8MII6]n+ (MII = Pd, Co, Ni, Cu) Coordination Cages
| Autor: | Stergios Piligkos, Priyanka Comar, Amgalanbaatar Baldansuren, Sergio Sanz, Nicholas F. Chilton, Helen M. O'Connor, Høgni Weihe, Paul J. Lusby, Eric J. L. McInnes, Mateusz B. Pitak, Simon J. Coles, Euan K. Brechin |
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| Rok vydání: | 2018 |
| Předmět: |
010405 organic chemistry
Chemistry Metal ions in aqueous solution 010402 general chemistry 01 natural sciences Magnetic susceptibility 0104 chemical sciences Ion law.invention Inorganic Chemistry Metal Magnetization Crystallography law visual_art visual_art.visual_art_medium Antiferromagnetism Physical and Theoretical Chemistry Electron paramagnetic resonance Spectroscopy |
| Zdroj: | Inorganic Chemistry. 57:3500-3506 |
| ISSN: | 1520-510X 0020-1669 |
| Popis: | The reaction of the simple metalloligand [FeIIIL3] [HL = 1-(4-pyridyl)butane-1,3-dione] with a variety of different MII salts results in the formation of a family of heterometallic cages of formulae [FeIII8PdII6L24]Cl12 (1), [FeIII8CuII6L24(H2O)4Br4]Br8 (2), [FeIII8CuII6L24(H2O)10](NO3)12 (3), [FeIII8NiII6L24(SCN)11Cl] (4), and [FeIII8CoII6L24(SCN)10(H2O)2]Cl2 (5). The metallic skeleton of each cage describes a cube in which the FeIII ions occupy the eight vertices and the MII ions lie at the center of the six faces. Direct-current magnetic susceptibility and magnetization measurements on 3–5 reveal the presence of weak antiferromagnetic exchange between the metal ions in all three cases. Computational techniques known in theoretical nuclear physics as statistical spectroscopy, which exploit the moments of the Hamiltonian to calculate relevant thermodynamic properties, determine JFe–Cu = 0.10 cm–1 for 3 and JFe–Ni = 0.025 cm–1 for 4. Q-band electron paramagnetic resonance spectra of 1 reveal a significant... |
| Databáze: | OpenAIRE |
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