报告题目：ElectronicState Modulation (ESM): A Newly Discovered Mechanism to Control the Magnetismof Porous Magnets
报告人：张俊博士后(Tohoku University, Japan)
报告时间：2020年12月16日（周三）晚上18:30
报告地点：腾讯会议ID：201538 273
主办单位：机械结构力学及控制国家重点实验室、航空学院、科协、国际合作与交流处
报告简介：
The molecule-basedmagnet has attracted increased interests for potential applications as sensor,memory, chemical switch, and quantum computing. A material showing a reversiblemagnetic change in response to chemical stimuli (solvents or gases) is desirablein both fields of metal-organic frameworks/porous coordination polymers(MOFs/PCPs) and molecule-based magnets. The ability to change the intrinsicspin state in MOF will enable us to hugely tune its magnetic behavior in anunprecedented level, but this ultimate goal was left as a formidable challenge.So, the electronic state modulation (ESM) in an electronically-correlatedcoordination lattice can provide solution to achieving a drastic change intheir magnetism, which will be realized via the dynamic control ofintra-lattice electron transfer/charge transfer in response to externalstimuli.
In thispresentation, I will report a class of layered porous magnets, in which thevoid space exists between the layers for the guest accommodation. Such space hasbeen utilized as a powerful tool for ESM of porous magnets by chemical stimuli(solvents or gases), resulting in the switch of the magnetic properties.Several examples of reversible magnetic changes closely associated with ESM andstructural modifications realized by solvents or gases insertion/removalcycles, as well as their theoretical studies will be demonstrated. Through ESM,the magnetic change is not only huge and drastic but also suitable for all thechemical species. These results provide an insight into the molecular magnetsand further the development of stimuli-responsive materials.
报告人简介：
张俊博士本科毕业于南京航空航天大学，在日本东北大学获得硕士和博士学位后。目前就职于日本东北大学金属材料研究所从事博士后研究。
张俊博士长期从事配位化学领域多孔分子磁体的研究。博士期间独立发现了一种能够有效调控分子材料磁性的新机制—电子状态调制（Electronic State Modulation, ESM）—为多孔分子材料的磁性调控提供了新的有力手段。基于该项发现，相关成果分别发表在了Nature Chem., JACS, ACIE等期刊上。并有相关工作被选为“Very Important Paper (VIP)” 、“Frontispiece”、“Inside cover”、“Editor’s Highlights”等。曾任日本学术振兴会特别研究员，获得“国家优秀自费留学生奖学金”、国际配位化学会议“Rising star award”等奖项，并主持日本学术振兴会青年科学基金等2项。