Metal–metal bond in lanthanide single-molecule magnets,Chemical Society Reviews

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Metal–metal bond in lanthanide single-molecule magnets
Chemical Society Reviews ( IF 40.4 ) Pub Date : 2022-11-07 , DOI: 10.1039/d2cs00516f
Zhenhua Zhu _{1,

2} , Jinkui Tang _{1,

3}

Affiliation

Lanthanide (Ln) compounds represent a unique chemical platform for developing high-temperature single-molecule magnets (SMMs). The shift in research focus from increasing the magnetic anisotropy barrier (U_eff) to raising the blocking temperature (T_B) has upgraded the design criteria from considering only the static crystal field (CF) to paying attention to the effects of molecular vibrations beyond the first coordination environment on the relaxation of magnetization. Although the realization of high working temperatures for Ln SMMs remains a formidable challenge, recent remarkable advances in dimetallofullerenes (di-EMFs) with Ln ions and mixed-valence dilanthanide complexes both feature single-electron Ln–Ln bonds to afford room-temperature molecular magnets. In this review, we provide critical discussion on the achievements of metal–metal (MM) bonded lanthanide SMMs, focusing on the effects of MM bonds on the magnetization dynamics, and shedding light on the future developments of high-temperature Ln SMMs.

中文翻译：

镧系元素单分子磁体中的金属-金属键

镧系元素 (Ln) 化合物代表了用于开发高温单分子磁体 (SMM) 的独特化学平台。研究重点从增加磁各向异性势垒（U _eff）到提高阻挡温度（T _B) 将设计标准从仅考虑静态晶体场 (CF) 升级为关注第一配位环境之外的分子振动对磁化弛豫的影响。尽管实现 Ln SMM 的高工作温度仍然是一项艰巨的挑战，但最近在具有 Ln 离子的双金属富勒烯 (di-EMF) 和混合价二镧系元素络合物方面取得的显着进展均具有单电子 Ln-Ln 键，可提供室温分子磁体. 在这篇综述中，我们对金属-金属 (MM) 键合镧系 SMM 的成就进行了批判性讨论，重点关注 MM 键对磁化动力学的影响，并阐明了高温 Ln SMM 的未来发展。

更新日期：2022-11-07

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