自旋交叉和价态异构是两种被广泛研究的经典的分子双稳态体系，在高密度信息存储、分子开关及传感等方面具有潜在应用价值。然而，分子多稳态体系不仅可以实现多重开关，而且在多进制计算中具有更高的效率，成为近年来新材料领域的研究热点。本项目提出结合自旋交叉及价态异构这两种经典分子双稳态体系来构筑多稳态分子磁性材料的新构想。本项目的分子设计策略和核心研究思路是：（1）设计并构筑自旋交叉和价态异构基本构筑单元；（2）通过可控合成得到多金属中心分子多稳态磁性配合物；（3）通过提高分子内协同作用，厘清磁构关系，最终提高分子多稳态磁性材料的性能。本项目旨在为分子多稳态体系提供新的理论和实验依据。

Spin crossover and valence tautomerism are two classical and widely studied molecular bistable systems, which have potential applications in high-density information storage, molecular switches and sensing. However, molecular multistable systems can not only realize multiple switches, but also have higher efficiency in multi-base calculation, which has become a hot research topic in the field of new materials in recent years. In this project, a new concept of building multistable molecular magnetic materials is proposed by combining two classical molecular bistable systems, namely, spin crossover and valence tautomerism. The molecular design strategy and core research ideas of this project are: (1) Design and construction of the basic building blocks of spin crossover and valence tautomerism; (2) Preparation of the multistable magnetic complexes with polymetallic centres by controlled synthesis; (3) Improving the performance of multistable molecular magnetic materials through improving the intramolecular synergy and clarifying the relationship of magnetic properties and structures. This project aims to provide a new theoretical and experimental basis for molecular multistable systems.