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Heterometallic trinuclear {CoIII2LnIII} (Ln = Gd, Tb, Ho and Er) complexes in a bent geometry. Field-induced single-ion magnetic behavior of the ErIIIand TbIIIanalogues
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Goura, Joydeb, Brambleby, Jamie, Topping, Craig V., Goddard, Paul, Suriya Narayanan, Ramakirushnan, Bar, Arun Kumar and Chandrasekhar, Vadapalli (2016) Heterometallic trinuclear {CoIII2LnIII} (Ln = Gd, Tb, Ho and Er) complexes in a bent geometry. Field-induced single-ion magnetic behavior of the ErIIIand TbIIIanalogues. Dalton Transactions, 45 (22). pp. 9235-9249. doi:10.1039/c5dt03871e ISSN 1477-9226.
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Official URL: http://dx.doi.org/10.1039/C5DT03871E
Abstract
Through the use of a multi-site compartmental ligand, 2-methoxy-6-[{2-(2-hydroxyethylamino)ethylimino}methyl]phenol (LH3), the family of heterometallic, trinuclear complexes of the formula [CoIII2Ln(L)2(μ-O2CCH3)2(H2O)3]·NO3·xMeOH·yH2O has been expanded beyond Ln = DyIII to include GdIII (1), TbIII (2), HoIII (3) and ErIII (4) for 1, 3 and 4 (x = 1; y = 1) and for 2 (x = 0; y = 2). The metallic core of these complexes consists of a (CoIII–LnIII–CoIII) motif bridged in a bent geometry resulting in six-coordinated distorted CoIII octahedra and nine-coordinated LnIII monocapped square-antiprisms. The magnetic characterization of these compounds reveals the erbium and terbium analogues to display a field induced single-ion magnetic behavior similar to the dysprosium analogue but at lower temperatures. The energy barrier for the reversal of the magnetization of the CoIII2TbIII analogue is Ueff ≥ 15.6(4) K, while for the CoIII2ErIII analogue Ueff ≥ 9.9(8) K. The magnetic properties are discussed in terms of distortions of the 4f electron cloud.
| Item Type: | Journal Article | ||||||||
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| Subjects: | Q Science > QD Chemistry | ||||||||
| Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||||
| Library of Congress Subject Headings (LCSH): | Complex compounds -- Magnetic properties, Ligands | ||||||||
| Journal or Publication Title: | Dalton Transactions | ||||||||
| Publisher: | Royal Society of Chemistry | ||||||||
| ISSN: | 1477-9226 | ||||||||
| Official Date: | 27 April 2016 | ||||||||
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| Volume: | 45 | ||||||||
| Number: | 22 | ||||||||
| Page Range: | pp. 9235-9249 | ||||||||
| DOI: | 10.1039/c5dt03871e | ||||||||
| Status: | Peer Reviewed | ||||||||
| Publication Status: | Published | ||||||||
| Access rights to Published version: | Restricted or Subscription Access | ||||||||
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