| Autor: |
Liu, Cai-Ming, Zhang, De-Qing, Hao, Xiang, Zhu, Dao-Ben |
| Předmět: |
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| Zdroj: |
Dalton Transactions: An International Journal of Inorganic Chemistry; 2/21/2020, Vol. 49 Issue 7, p2121-2128, 8p |
| Abstrakt: |
Three novel isostructural Zn2Ln2 cluster complexes with carbonate bridging ligands, {Zn2Ln2(μ3-CO3)2L2(acacF6)2}·CH3OH [H2L = N,N′-dimethyl-N,N′-(2-hydroxy-3-methoxy-5-methyl-benzyl)ethylenediamine; HacacF6 = hexafluoroacetylacetone; Ln = Dy, 1; Ln = Gd, 2; Ln = Eu, 3], have been prepared by fixing carbon dioxide in the atmosphere. Such carbonate bridging ligands may mediate ferromagnetic exchange between Ln3+ ions. The Zn2Dy2 compound (1) displays the properties of a single molecule magnet (SMM), showing slow magnetic relaxation at a 1500 Oe dc field, with an obviously larger Ueff/k value (83 K) with respect to the other carbonate-bridged Zn2Dy2 SMMs (≤34 K) and ZnDy dinuclear SMMs derived from the same ligand H2L used in this work (≤36.5 K), while the Zn2Gd2 compound (2) shows a moderate magnetocaloric effect and can be looked upon as a potential molecular material for low temperature magnetic refrigeration. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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