A trinuclear {Fe_(2)^(Ⅲ)Fe^(Ⅱ)} complex involving both spin and non-spin transitions exhibits three-step and wide thermal hysteresis  

作　　者：Xin-Hua Zhao Dong Shao Jia-Tao Chen De-Xuan Gan Jiong Yang Yuan-Zhu Zhang 

机构地区：[1]Department of Chemistry,Southern University of Science and Technology(SUSTech),Shenzhen 518055,China

出　　处：《Science China Chemistry》2022年第3期532-538,共7页中国科学（化学英文版）

基　　金：supported by the Stable Support Plan Program of Shenzhen Natural Science Fund (20200925151834005);the National Natural Science Foundation of China (21671095);the China Postdoctoral Science Foundation (2020M682763)。

摘　　要：The engineering of switchable molecules with magnetic multistability is lying on the cutting-edge research topics for integrating multi-switches and ternary memory devices. Here we presented a cyanide-bridged {Fe_(2)^(Ⅲ)Fe^(Ⅱ)} desolvated complex {[(pzTp)Fe^(Ⅲ)-(CN)3]2[Fe^(Ⅱ)(L)]} (1), obtained through single-crystal-to-single-crystal (SCSC) transformation from its solvated phase {[(pzTp)-Fe^(Ⅲ)(CN)3]2[Fe^(Ⅱ)(L)]}·2CH_(3)OH·5H_(2)O (1·sol). Remarkably, 1 exhibited unprecedented three-step transition in magnetization with wide thermal hysteresis (44, 40, and 36 K) in the temperature range of 80–320 K. The detailed studies demonstrated that the tristable character originates from both an order-disorder structural phase transition (SPT) and a strongly cooperative two-step spin crossover (SCO) process. This work thus provides a new promising strategy for realizing multiple bistablity in magnetization by introducing two different transitions.

关 键 词：magnetic multistability cyanide complex spin crossover phase transition magnetic switching 

分 类 号：O641.4[理学—物理化学]