基于软硬酸碱理论，稀土亲氧的特性决定了稀土基单分子磁体（SMMs）的报道多集中于含氧配体化合物，而硫、卤素或氮等非氧原子参与配位的稀土基SMMs报道相对较少。非氧原子的引入可能给稀土提供新的配位环境和晶体场，从而影响稀土的各向异性跟磁性质。因此本课题拟围绕"硫/卤素/氮等非氧原子参与配位的稀土基单分子磁体的设计合成及性质研究"课题开展系列工作，希望观察在晶体场为主要磁影响因素的稀土基SMMs中，非氧原子给稀土提供的新的配位环境和晶体场是否能使稀土基SMMs展现出不同寻常的磁学性质。并详细比较含氧/硫/卤素/氮等配体构建的稀土基SMMs的结构及性能差异之处；深入探讨体系构效关系以及其慢磁驰豫行为的影响因素；进一步探索提高磁化势垒Δeff和TB温的可能因素。

Most reported Ln-based Single-Molecule Magnets (SMMs) are constructed by O-donor ligands,because Ln ions are considered to be hard acids in the Pearson classification of acids and bases which prefer interactions with hard O donor ligands over softer S，halogon or N donor ligands.This project just aims at the synthesis and magnetic study of the less reported Ln-based SMMs constructed by N,S or halogen donor ligands, which can give the new crystal-field environment and may further affect the magetic behavior of Ln ions. We will also study the properties of the novel materials and their magneto-structure correlations, and try to explore how can the ligand fields affect the △eff、TB and/or the phenomenon of quantum tunneling of the SMMs. We want to get the conclusion of the structure and magnetic difference between Ln-based SMMs constructed by O-donner and N/S/Cl-donner ligands.