Functionalised beta-diketonate polynuclear lanthanoid hydroxo clusters: Synthesis, characterisation, and magnetic properties
The controlled hydrolysis of lanthanoid trichloride hexahydrate (Ln = Nd, Eu, Ho) in methanol with the beta-diketone ligands dibenzoylmethane and 1,3-bis(4-ethoxyphenyl)propane-1,3-dione yielded tetranuclear and pentanuclear hydroxo clusters for Eu and Ho. In contrast, performing the reaction in the...
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| Format: | Journal Article |
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PERGAMON-ELSEVIER SCIENCE LTD
2009
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| Online Access: | http://hdl.handle.net/20.500.11937/11219 |
| _version_ | 1848747746912108544 |
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| author | Andrews, P. Beck, T. Fraser, B. Junk, P. Massi, Massimiliano Moubaraki, B. Murray, K. Silberstein, M. |
| author_facet | Andrews, P. Beck, T. Fraser, B. Junk, P. Massi, Massimiliano Moubaraki, B. Murray, K. Silberstein, M. |
| author_sort | Andrews, P. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | The controlled hydrolysis of lanthanoid trichloride hexahydrate (Ln = Nd, Eu, Ho) in methanol with the beta-diketone ligands dibenzoylmethane and 1,3-bis(4-ethoxyphenyl)propane-1,3-dione yielded tetranuclear and pentanuclear hydroxo clusters for Eu and Ho. In contrast, performing the reaction in the presence of 1,3-bis(4-methoxyphenyl)propane-1,3-dione yielded a mononuclear complex for Nd. The compounds were structurally characterised by means of single crystal X-ray diffraction, showing that the increased bulkiness of the ligand due to the ethoxy functionalities does not affect the capability of the diketonate to stabilize the cluster core. Variable temperature dc susceptibility magnetic measurements were made on the Clusters and were indicative of very weak to zero antiferromagnetic, intra-cluster Coupling. Variable frequency ac data recorded at low temperatures did not show any evidence for single molecule magnet (SMM) behaviour. unlike the recent reported case of the analogue [Dy-5(OH)(5)(Ph(2)acac)(10)], where Ph(2)acac(-) is the dibenzoylmethanide ligand. |
| first_indexed | 2025-11-14T06:54:03Z |
| format | Journal Article |
| id | curtin-20.500.11937-11219 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T06:54:03Z |
| publishDate | 2009 |
| publisher | PERGAMON-ELSEVIER SCIENCE LTD |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-112192017-09-13T16:03:14Z Functionalised beta-diketonate polynuclear lanthanoid hydroxo clusters: Synthesis, characterisation, and magnetic properties Andrews, P. Beck, T. Fraser, B. Junk, P. Massi, Massimiliano Moubaraki, B. Murray, K. Silberstein, M. beta-Diketones Crystal structures Metal-hydroxo clusters Magnetic susceptibility Lanthanoids The controlled hydrolysis of lanthanoid trichloride hexahydrate (Ln = Nd, Eu, Ho) in methanol with the beta-diketone ligands dibenzoylmethane and 1,3-bis(4-ethoxyphenyl)propane-1,3-dione yielded tetranuclear and pentanuclear hydroxo clusters for Eu and Ho. In contrast, performing the reaction in the presence of 1,3-bis(4-methoxyphenyl)propane-1,3-dione yielded a mononuclear complex for Nd. The compounds were structurally characterised by means of single crystal X-ray diffraction, showing that the increased bulkiness of the ligand due to the ethoxy functionalities does not affect the capability of the diketonate to stabilize the cluster core. Variable temperature dc susceptibility magnetic measurements were made on the Clusters and were indicative of very weak to zero antiferromagnetic, intra-cluster Coupling. Variable frequency ac data recorded at low temperatures did not show any evidence for single molecule magnet (SMM) behaviour. unlike the recent reported case of the analogue [Dy-5(OH)(5)(Ph(2)acac)(10)], where Ph(2)acac(-) is the dibenzoylmethanide ligand. 2009 Journal Article http://hdl.handle.net/20.500.11937/11219 10.1016/j.poly.2009.03.031 PERGAMON-ELSEVIER SCIENCE LTD restricted |
| spellingShingle | beta-Diketones Crystal structures Metal-hydroxo clusters Magnetic susceptibility Lanthanoids Andrews, P. Beck, T. Fraser, B. Junk, P. Massi, Massimiliano Moubaraki, B. Murray, K. Silberstein, M. Functionalised beta-diketonate polynuclear lanthanoid hydroxo clusters: Synthesis, characterisation, and magnetic properties |
| title | Functionalised beta-diketonate polynuclear lanthanoid hydroxo clusters: Synthesis, characterisation, and magnetic properties |
| title_full | Functionalised beta-diketonate polynuclear lanthanoid hydroxo clusters: Synthesis, characterisation, and magnetic properties |
| title_fullStr | Functionalised beta-diketonate polynuclear lanthanoid hydroxo clusters: Synthesis, characterisation, and magnetic properties |
| title_full_unstemmed | Functionalised beta-diketonate polynuclear lanthanoid hydroxo clusters: Synthesis, characterisation, and magnetic properties |
| title_short | Functionalised beta-diketonate polynuclear lanthanoid hydroxo clusters: Synthesis, characterisation, and magnetic properties |
| title_sort | functionalised beta-diketonate polynuclear lanthanoid hydroxo clusters: synthesis, characterisation, and magnetic properties |
| topic | beta-Diketones Crystal structures Metal-hydroxo clusters Magnetic susceptibility Lanthanoids |
| url | http://hdl.handle.net/20.500.11937/11219 |