Reversible light-driven magnetic switching of salen cobalt complex  

作　　者：Song Wan Mengqi Li Zhipeng Zhang Hancheng Xi Hong Yang Qianfu Luo Wei-Hong Zhu 

机构地区：[1]Shanghai Key Laboratory of Functional Materials Chemistry,Key Laboratory for Advanced Materials and Institute of Fine Chemicals,Joint International Research Laboratory of Precision Chemistry and Molecular Engineering,Feringa Nobel Prize Scientist Joint Research Center,Frontiers Science Center for Materiobiology and Dynamic Chemistry,School of Chemistry and Molecular Engineering,East China University of Science&Technology,Shanghai 200237,China

出　　处：《Science China Chemistry》2020年第9期1191-1197,共7页中国科学（化学英文版）

基　　金：the National Natural Science Foundation of China for the Science Center Program(21788102);the Creative Research Groups(21421004)and Key Project(21636002);the National Natural Science Foundation of China(21905091);the Shanghai Municipal Science and Technology Major Project(Grant 2018SHZDZX03);the Innovation Program of Shanghai Municipal Education Commission;Scientific Committee of Shanghai(15XD1501400);the Program of Introducing Talents of Discipline to Universities(B16017);the Shanghai Pujiang Program(18PJ1402200);China Postdoctoral Science Foundation(2019M651418)。

摘　　要：Spin-crossover(SCO)metal complexes are expected to be widely used in data storage materials,display devices and sensors.Although a lot of spin-crossover photoswitches have been developed,the reversible photomodulation cases that work at room temperature are limited.Herein,a novel cobalt complex o-1-Co(II)wherein the salen unit bridges with bis-diarylethene has been designed as switch to construct"off-on"logic operation at room temperature.The complex o-1-Co(II)displays an abrupt,reversible and hysteretic spin crossover(T1/2↓=166 K,T1/2↑=177 K,andΔT1/2=11 K)between the high-spin(HS)and low-spin(LS)states.Meanwhile,photocyclization of o-1-Co(II)with UV light produces a photoresponsive closed form c-1-Co(II),which always stays at low-spin without SCO at all.Moreover,the magnetic switching of the complex can also be achieved with redox reactions between Co(II)and Co(III).

关 键 词：PHOTOCHROMISM DIARYLETHENE salen complex SPIN-CROSSOVER magnetic switch 

分 类 号：TM564[电气工程—电器] O641.4[理学—物理化学]