稀土单分子磁体通常具有强磁各向异性和高能垒，因而成为近年分子磁性材料领域的前沿和热点。但是制约该类分子材料发展的一个瓶颈问题是量子隧穿效应（QTM）普遍存在，所以如何有效克服QTM效应，是制备高能垒、高阻塞温度稀土单分子磁体面临的巨大挑战。同时，另一个必须面对的巨大难题是稀土单分子磁体的理性制备和性能调控，它是稀土单分子磁体能否广泛应用的关键。但是从现阶段的技术发展水平来看，在分子设计水平上实现QTM调控、稀土单分子磁体的理性制备和性能调控仍然只是研究者们的憧憬，尚需要研究者们加大力度开展大量的实验和理论研究工作。为解决以上科学难题，本项目拟开展双核稀土单分子磁体的系统研究，通过分子设计手段，实现微调稀土离子配位构型、分子内和分子间的磁相互作用，达到调控QTM效应、稀土单分子磁理性制备以及性能调控等目标，并从中阐明相关构效关系，为最终解决以上两个科学难题提供新思路以及翔实的理论和实验依据。

Lanthanon?single molecule magnets (SMMs) usually hold stronger magnetic anisotropy and higher energy barrier, becoming to be a hot topic in the field of molecular magnetic materials, recently. But for this kind of materials, the isolation of zero-field effective energy barrier is often difficult, due to the prevalent existence of fast quantum tunneling of magnetization (QTM). Thereby, how to suppress QTM effect will be the big challenge for us to obtain lanthanon SMMs with high energy barrier,high blocking temperature. Meantime, we also must realize another big scientific problem about the rational preparation and property modulation of lanthanon SMMs, as it is crucial for whether this kind of materials can be extensively applied.In light of the current state of arts, by means of moleculear design,the achievement of the above-mentioned goals is still a longing.Hence,there is still a lot of academic and experimental work for us to do. Based on this consideration, herein, we try to design a series of dinuclear lanthanon SMMs and carry out system research of it.Upon molecular design we want to first achieve the weak regulation of the coordination geometry of lanthanon ion, the intramolecular and intermolecular magnetic interactions, next resolve the above-mentioned two scientific problem,finally obtain the rule between molecular design and the suppressed QTM effect, the rational preparation of SMMs, the property modulation of SMMs. It is expected that this project will create a new approach and provide abundant academic and experimental data for the resolvation of the two scientific problem.