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Data for Octanuclear heterobimetallic {Ni4Ln4} assemblies possessing Ln4 square grid [2×2] motifs: synthesis, structure and magnetism
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Biswas, Sourav, Goura, Joydeb, Das, Sourav, Topping, Craig V., Brambleby, Jamie, Goddard, Paul and Chandrasekhar, Vadapalli (2016) Data for Octanuclear heterobimetallic {Ni4Ln4} assemblies possessing Ln4 square grid [2×2] motifs: synthesis, structure and magnetism. [Dataset]
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Abstract
Octanuclear heterobimetallic complexes, [Ln4Ni4(H3L)4(µ3-OH)4(µ2-OH)4]4Cl·xH2O·yCHCl3 (Dy3+ , x = 30.6, y = 2 (1); Tb3+ , x = 28, y = 0 (2) ; Gd3+ , x = 25.3, y = 0 (3); Ho3+ , x = 30.6, y = 3 (4)) (H5L = N1, N3-bis(6-formyl-2-(hydroxymethyl)
-4-methylphenol) diethylenetriamine) are reported. These are assembled by the cumulative coordination action of four doubly deprotonated compartmental ligands, [H3L] 2- , along with eight exogenous –OH ligands. Within the core of these complexes, four Ln3+ are distributed to the four corners of a perfect square grid while four Ni2+ are projected away from the plane of the Ln4 unit. Each of the four Ni2+ possesses distorted octahedral geometry while all the Ln3+ are crystallographically equivalent and are present in an elongated square antiprism geometry. The magnetic properties of compound 3 are dominated by an easy-plane single-ion anisotropy of the Ni2+ ions [DNi = 6.7(7) K] and dipolar interactions between Gd3+ centers. Detailed ac magnetometry reveals the presence of distinct temperature-dependent out-of-phase signals for compounds 1 and 2, indicative of slow magnetic relaxation. Magnetochemical analysis of complex 1 implies the 3d and the 4f metal ions are engaged in ferromagnetic interactions with SMM behavior, while dc magnetometry of compound 2 is suggestive of an antiferromagnetic Ni-Tb spin-exchange with slow magnetic relaxation due to a field-induced level crossing. Compound 4 exhibits an easy-plane single-ion anisotropy for the Ho3+ ions and weak interactions between spin centers.
| Item Type: | Dataset | ||||||
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| Subjects: | Q Science > QD Chemistry | ||||||
| Divisions: | Faculty of Science > Physics | ||||||
| Type of Data: | Multiple | ||||||
| Library of Congress Subject Headings (LCSH): | Inorganic compounds -- Synthesis, Inorganic compounds -- Magnetic properties | ||||||
| Publisher: | Department of Physics, University of Warwick | ||||||
| Official Date: | 27 July 2016 | ||||||
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| Date of first compliant deposit: | 27 July 2016 | ||||||
| Status: | Not Peer Reviewed | ||||||
| Publication Status: | Published | ||||||
| Media of Output: | ASCII | ||||||
| Access rights to Published version: | Open Access | ||||||
| Description: | Fig10_Data, Fig11_Data, Fig12_Data, Fig13_Data, Fig15_Data, FigS12_Data, FigS13_Data, FigS14_Data, FigS15_Data |
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