Full metadata record
DC Field | Value | Language |
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dc.contributor.author | Das, Sourav | - |
dc.contributor.author | Dey, Atanu | - |
dc.contributor.author | Kundu, Subrata | - |
dc.contributor.author | Biswas, Sourav | - |
dc.contributor.author | Narayanan, Ramakirushnan Suriya | - |
dc.contributor.author | Titos-Padilla, Silvia | - |
dc.contributor.author | Lorusso, Giulia | - |
dc.contributor.author | Evangelisti, Marco | - |
dc.contributor.author | Colacio, Enrique | - |
dc.contributor.author | Chandrasekhar, Vadapalli | - |
dc.date.available | 2017-07-11T05:43:52Z | - |
dc.date.created | 2017-04-10 | - |
dc.date.issued | 2015-11-16 | - |
dc.identifier.issn | 0947-6539 | - |
dc.identifier.uri | http://hdl.handle.net/20.500.11750/2817 | - |
dc.description.abstract | The reaction of a Schiff base ligand (LH3) with lanthanide salts, pivalic acid and triethylamine in 1:1:1:3 and 4:5:8:20 stoichiometric ratios results in the formation of decanuclear Ln10 (Ln=Dy(1), Tb(2), and Gd (3)) and pentanuclear Ln5 complexes (Ln=Gd (4), Tb (5), and Dy (6)), respectively. The formation of Ln10 and Ln5 complexes are fully governed by the stoichiometry of the reagents used. Detailed magnetic studies on these complexes (1-6) have been carried out. Complex 1 shows a SMM behavior with an effective energy barrier for the reversal of the magnetization (Ueff)=16.12(8) K and relaxation time (τo)=3.3×10-5 s under 4000 Oe direct current (dc) field. Complex 6 shows the frequency dependent maxima in the out-of-phase signal under zero dc field, without achieving maxima above 2 K. Complexes 3 and 4 show a large magnetocaloric effect with the following characteristic values: -ΔSm=26.6 J kg-1 K-1 at T=2.2 K for 3 and -ΔSm=27.1 J kg-1 K-1 at T=2.4 K for 4, both for an applied field change of 7 T. Homometallic complexes: The reaction of a multidentate flexible Schiff base ligand (LH3; see figure) with [LnCl3]6 H2O affords homometallic decanuclear complexes, [Ln10(LH)10(κ2-Piv)10] (Ln=Dy, Tb, and Gd), and homometallic pentanuclear complexes, [Ln5(LH)4(μ2-η1η1Piv)4(η1Piv)(S)] (Ln=Dy, Tb, and Gd). The Dy3+ analogues exhibit single-molecule magnet (SMM) behavior, whereas the Gd3+ complexes show a significant magnetocaloric effect (MCE). © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. | - |
dc.publisher | Wiley-VCH Verlag | - |
dc.title | Decanuclear Ln(10) Wheels and Vertex-Shared Spirocyclic Ln(5) Cores: Synthesis, Structure, SMM Behavior, and MCE Properties | - |
dc.type | Article | - |
dc.identifier.doi | 10.1002/chem.201501992 | - |
dc.identifier.scopusid | 2-s2.0-84946601369 | - |
dc.identifier.bibliographicCitation | Chemistry: A European Journal, v.21, no.47, pp.16955 - 16967 | - |
dc.subject.keywordAuthor | lanthanide complexes | - |
dc.subject.keywordAuthor | ligands | - |
dc.subject.keywordAuthor | macrocycles | - |
dc.subject.keywordAuthor | magnetic properties | - |
dc.subject.keywordAuthor | X-ray diffraction | - |
dc.subject.keywordPlus | Characteristic Value | - |
dc.subject.keywordPlus | COUPLING DY-3 TRIANGLES | - |
dc.subject.keywordPlus | DYSPROSIUM TRIANGLES | - |
dc.subject.keywordPlus | GD | - |
dc.subject.keywordPlus | GROUND-STATE | - |
dc.subject.keywordPlus | Homometallic Complexes | - |
dc.subject.keywordPlus | III COMPLEXES | - |
dc.subject.keywordPlus | Lanthanide Complex | - |
dc.subject.keywordPlus | Lanthanide Complexes | - |
dc.subject.keywordPlus | Ligands | - |
dc.subject.keywordPlus | Macrocycles | - |
dc.subject.keywordPlus | Magnetic Properties | - |
dc.subject.keywordPlus | Magnetization Reversal | - |
dc.subject.keywordPlus | Magnetocaloric Effect (MCE) | - |
dc.subject.keywordPlus | Magnetocaloric Effects | - |
dc.subject.keywordPlus | METAL-ORGANIC FRAMEWORKS | - |
dc.subject.keywordPlus | MOMENT | - |
dc.subject.keywordPlus | Pentanuclear Complexes | - |
dc.subject.keywordPlus | Rare Earth Elements | - |
dc.subject.keywordPlus | SINGLE-MOLECULE-MAGNET | - |
dc.subject.keywordPlus | Single-Molecule Magnet | - |
dc.subject.keywordPlus | SLOW RELAXATION | - |
dc.subject.keywordPlus | Stoichiometric Ratio | - |
dc.subject.keywordPlus | X-Ray Diffraction | - |
dc.subject.keywordPlus | X Ray Diffraction | - |
dc.citation.endPage | 16967 | - |
dc.citation.number | 47 | - |
dc.citation.startPage | 16955 | - |
dc.citation.title | Chemistry: A European Journal | - |
dc.citation.volume | 21 | - |
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