基于多金属氧酸盐的单核镧系单分子磁体。

Mononuclear lanthanide single-molecule magnets based on polyoxometalates.

作者信息

Aldamen Murad A, Clemente-Juan Juan M, Coronado Eugenio, Martí-Gastaldo Carlos, Gaita-Ariño Alejandro

机构信息

Instituto de Ciencia Molecular, Universidad de Valencia, Polígono de la Coma s/n, 46980 Paterna, Spain.

出版信息

J Am Chem Soc. 2008 Jul 16;130(28):8874-5. doi: 10.1021/ja801659m. Epub 2008 Jun 18.

DOI:10.1021/ja801659m

PMID:18558687

Abstract

[ErW10O36]9- is the first polyoxometalate behaving as a single-molecule magnet (SMM). It shows frequency-dependent out-of-phase magnetization and a thermally activated single relaxation process with an effective barrier of 55.8 K. This single lanthanide ion polyoxometalate is the inorganic analogue of the bis(phthalocyaninato)lanthanide SMMs, both exhibiting very similar ligand field symmetries around the lanthanide ion (idealized D4d). It is chemically stable and offers new avenues for organization and processing of single-molecule magnets. Furthermore, it can be made free from nuclear spins and opens the possibility to be used for studies of decoherence on unimolecular qubits.

摘要

[ErW₁₀O₃₆]⁹⁻是首个表现为单分子磁体（SMM）的多金属氧酸盐。它呈现出频率依赖的异相磁化以及具有55.8 K有效势垒的热激活单弛豫过程。这种单镧系离子多金属氧酸盐是双（酞菁基）镧系单分子磁体的无机类似物，两者在镧系离子周围都表现出非常相似的配体场对称性（理想化的D₄d）。它化学性质稳定，为单分子磁体的组装和加工提供了新途径。此外，它可以无核自旋，为用于单分子量子比特退相干研究开辟了可能性。