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https://doi.org/10.1002/chem.201100218
Title: | Structure, Magnetism and Theory of a Family of Nonanuclear Cu(5)(II)Ln(4)(III)-Triethanolamine Clusters Displaying Single-Molecule Magnet Behaviour | Authors: | Langley, Stuart K Ungur, Liviu Chilton, Nicholas F Moubaraki, Boujemaa Chibotaru, Liviu F Murray, Keith S |
Keywords: | Science & Technology Physical Sciences Chemistry, Multidisciplinary Chemistry cluster compounds copper lanthanides magnetic properties N,O ligands NEUTRON-SCATTERING SPECTRA HIGH-SPIN MOLECULES SLOW RELAXATION GROUND-STATE ANISOTROPY BARRIERS DY-3 TRIANGLES ENERGY-LEVELS SMM BEHAVIOR TB-III TETRANUCLEAR |
Issue Date: | 1-Aug-2011 | Publisher: | WILEY-BLACKWELL | Citation: | Langley, Stuart K, Ungur, Liviu, Chilton, Nicholas F, Moubaraki, Boujemaa, Chibotaru, Liviu F, Murray, Keith S (2011-08-01). Structure, Magnetism and Theory of a Family of Nonanuclear Cu(5)(II)Ln(4)(III)-Triethanolamine Clusters Displaying Single-Molecule Magnet Behaviour. CHEMISTRY-A EUROPEAN JOURNAL 17 (33) : 9209-9218. ScholarBank@NUS Repository. https://doi.org/10.1002/chem.201100218 | Abstract: | Synthesis, crystal structures and magnetic studies are reported for four new heterometallic CuII-LnIII clusters. The reaction of Cu(NO3)2̇3H2O with triethanolamine (teaH3), pivalic acid, triethylamine and Ln(NO3) 3̇6H2O (Ln=Gd, Tb, Dy and Ho) results in the formation of four isostructural nonanuclear complexes of general formula [Cu II5LnIII4O2(teaH) 4{O2CC(CH3)3}2(NO 3)4(OMe)4]̇2MeOḢ2Et2O [Ln=Gd (1), Tb (2), Dy (3) and Ho (4)]. The metal core of each cluster is made up of four face- and vertex-sharing tetrahedral units. Solid-state DC magnetic susceptibility studies reveal competing anti- and ferromagnetic interactions within each cluster leading to large-spin ground states for 1-4. Solid-state AC magnetic susceptibility studies show frequency-dependent out-of-phase (χ″ M) signals for 2-4 below 4 K, suggestive of single-molecule magnet behaviour. Ab initio calculations on one of the anisotropic examples (3) provided a rare set of J values for Dy-Cu and Cu-Cu exchange interactions (Dy-Dy zero), some ferro- and some antiferromagnetic in character, that explain its magnetic behaviour. © 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. | Source Title: | CHEMISTRY-A EUROPEAN JOURNAL | URI: | https://scholarbank.nus.edu.sg/handle/10635/228753 | ISSN: | 09476539 15213765 |
DOI: | 10.1002/chem.201100218 |
Appears in Collections: | Elements Staff Publications |
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Langley_CEJ_2011.cif.txt | Supporting information | 119.25 kB | Text | CLOSED | None | |
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Langley_CEJ_2011_SI.pdf | Supporting information | 897.04 kB | Adobe PDF | CLOSED | None |
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