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【前沿讲坛】英国曼彻斯特大学Richard Winpenny教授学术报告
点击数:1335    更新时间:2016/4/5 16:16:08

讲座人:Prof. Richard Winpenny ,The University of Manchester

讲座题目:Lanthanide Complexes as Single Molecule Magnets

地点:前沿院西一楼 A306,曲江校区

时间:2016年4月5日(星期二),上午10:00

简介:
Richard Winpenny教授是英国皇家科学院院士,英国曼彻斯特大学(The University of Manchester)化学系系主任兼光电技术学院院长,西安交通大学客座教授。2009年获英国皇家科学院乌尔夫森终身成就奖(Royal Society Wolfson MeritAward),2011年获英国皇家化学会提尔登奖(Tilden Prize of the RoyalSociety of Chemistry),长期从事纳米金属团簇、分子磁体的合成及其在量子计算中的应用研究。他所带领的研究团队在欧洲乃至全世界的影响力巨大,是目前该研究领域的国际带头人之一。目前,他带领的团队已在包括Nature/Nature子刊等重要期刊发表SCI论文332篇,
引用超过11000次,H-因子为58。

摘要:
The 4f-elements offer a fascinating opportunity for molecular magnetism, as they provide complexes that are isostructural but where the metal ion can have a diverse range of magnetic behaviour. Here we will focus on dysprosium(III) complexes as DyIII has a high magnetic moment and is very anisotropic, which makes it ideal for forming single molecule magnets. Dysprosium alkoxides have extremely high energy barriers for magnetic relaxation, and studies of such complexes allow us to make initial predictions concerning the relaxation pathways in such complexes. 1 From these studies we have developed an ideal structure for a single molecule magnet,2 and have pursued new chemistry to achieve this ideal structure. This has led to studies of [Dy(BIPM)2]- complexes3 (BIPM = {C(PPh2NSiMe3)2}2-) both as pure compound and doped into [Y(BIPM)2]- complexes. Very high energy barriers to magnetic relaxation are seen, which can be explained using CASSCF calculations ; luminescence spectroscopy confirms that the energy levels derived by CASSCF are broadly correct. We have also investigated magnetic exchange between Dy….Dy centres in other single molecule magnets, using a range of physical techniques to measure the exchange directly for the first time.

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