Chain Compounds Based on Paddle-wheel Copper(II) Carboxylate Bearing Four Nitroxide Radicals
| Autor: | Masafumi Fukuzaki, Renny Indrawati, Makoto Handa, Shizuka Matsubara, Kazuyuki Yokota, Masahiro Mikuriya, Rieko Hashido, Daisuke Yoshioka, Chizu Nakamura |
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| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Nitroxide mediated radical polymerization
Pyrazine Crystal structure DABCO 010402 general chemistry 010403 inorganic & nuclear chemistry 01 natural sciences lcsh:Chemistry chemistry.chemical_compound Paddle wheel Materials Chemistry Carboxylate Octane organic radical chain compound Ligand 0104 chemical sciences Electronic Optical and Magnetic Materials Crystallography chemistry lcsh:QD1-999 Chemistry (miscellaneous) antiferromagnetic interaction copper(II) carboxylate nitroxide radical |
| Zdroj: | Magnetochemistry, Vol 4, Iss 2, p 22 (2018) Magnetochemistry; Volume 4; Issue 2; Pages: 22 |
| Popis: | Chain compounds of paddle-wheel Cu2-clusters of 3-carboxy-2,2,5,5-tetramethyl-1-pyrrolidinyloxy (Hcaproxy) and 4-carboxy-2,2,6,6-tetramethylpiperidinyloxy (Hcatempo) and N,N’-bidentate ligands (L = 4,4′-bipyridine (4,4′-bpy), 1,2-bis(4-pyridyl)ethane (bpe), trans-1,2-bis(4-pyridyl)ethylene (bpel), 4,4′-dipyridyl disulfide (pds), 1,4-diazabicyclo[2.2.2]octane (dabco), and pyrazine (pyz)), [Cu2(caproxy)4(L)]n, and [Cu2(catempo)4(L)]n, were synthesized and characterized by elemental analysis, infrared and UV-vis spectra and temperature dependence of magnetic susceptibilities (4.5–300 K). The crystal structures of [Cu2(caproxy)4(pds)]n, [Cu2(catempo)4(4,4′-bpy)]n, and [Cu2(catempo)4(bpe)]n revealed zigzag or linear chains consisting of alternate arrangement of the dinuclear cluster bearing four nitroxide radicals and N,N’-bidentate ligand. Temperature dependence of magnetic susceptibilities showed a considerable antiferromagnetic interaction between the two copper(II) ions within the dinuclear cluster, and weak antiferromagnetic interaction between the dinuclear clusters and/or the radical and dinuclear cluster. |
| Databáze: | OpenAIRE |
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