Trinuclear dysprosium cluster compound single-molecular magnet and preparation method thereof

Abstract

A trinuclear dysprosium cluster compound single-molecular magnet has a chemical formulation as [Dy3(HL)(H2L)(NO3)4], wherein L is N,N,N'N'-tetrahydroxyethyl-ethylene diamine; Dy atoms in three different coordinated environments exit in a dysprosium single-molecule magnet to form an unenclosed triangular trinuclear Dy structure; the preparation method of the single-molecular magnet comprises the following steps: taking dysprosium nitrate hexahydrate as metal salt, taking L as a ligand, taking LiOH as an alkaline matter of which the pH value is 7, and enabling mixed solution to be subjected to stirring, baking, separating and solid washing. The single-molecular magnet and the preparation method have the advantages that the synthetic process is changed, the dysprosium single-molecule magnet expresses the single-molecular magnet behavior with the rare double relaxation phenomenon, and two slow magnetic relaxation processes can be independently and separately researched as compared with the previous patent: ZL201110026019, which provides a good way for researching the multiple relaxation processes.

Description

【Technical field】 [0001] The invention relates to the preparation of magnetic materials, in particular to a trinuclear dysprosium cluster single-molecule magnet and its preparation method. 【Background technique】 [0002] Single-Molecule Magnets (SMMs) are new materials between molecular-based magnets and nanomagnetic materials. Gatteschi D. discovered the first single-molecule magnet in 1993 [Mn 12 o 12 (OCMe) 16 (H 2 O) 4 ], opened up a new field of magnetism, see: SessoliR. et al., Nature, 1993, 365; Gatteschi D. et al., Science, 1994, 265. With the development of science in recent years, single-molecule magnets have attracted more and more attention from many scientists at home and abroad. It has superparamagnetic phenomenon at low temperature. The study of its unusual magnetic properties not only contributes to the development of nanomagnetic ion physics and chemistry, but also helps us better understand the quantum tunneling effect of nanomagnets. See: Quantum Tun...

AI Technical Summary

Problems solved by technology

[0003] Tang J.K. et al. successively reported the properties of linear tetranuclear dysprosium single-molecule magnets showing the transition from one relaxation process to another relaxation process, but there are two defects: first, the temperature range is relatively narrow, which is not conducive to The study of quantum chemistry on the multi-step relaxation process; second, an external DC field was introduced to change the pure multi-step relaxation magnetic behavior

Although the compound also exhibits two slow magnetic relaxation processes without introducing a DC field, these two processes are superimposed on each other, which brings great difficulty to the analysis of these two processes

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