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p电子诱导的铁磁性和半金属性(half-metallicity)(图)
p电子诱导 铁磁性 半金属性
2020/4/9
中国科学院物理研究所/北京凝聚态物理国家研究中心先进材料与结构分析实验室A02组博士生邓俊、郭建刚副研究员和陈小龙研究员分析了AO2 (A= K, Rb, Cs)中O2-二聚体的磁性相互作用规律,提出了改变化合物中层与层之间O2-二聚体的排布方式来调控磁性,从而诱导长程铁磁序的学术思想,如图1所示。利用第一性原理计算结合结构搜索的方法,他们筛选出了具有铁磁性的三元半金属(half-metal)化合...
Unphysical artifacts are responsible for molecular orientation with half-cycle pulses
Unphysical artifacts molecular orientation half-cycle pulses Chemical Physics
2012/5/31
Sub-cycle electromagnetic pulses in the Terahertz region are considered to be one of the best ways to orient molecules. The simplest option corresponds to half-cycles pulses in the sudden regime, for ...
Synthesis and X-Ray Structural Studies of Amino Acids Half Sandwich Complexes of Osmium(II)
Osmium X-Ray studies N ligands Amino acids Half sandwich Complexes
2010/4/16
The amino acids complexes of osmium(II), i.e. [Os(h 6-p-cymene)(h1-N-(rac)-phenylglycine methyl ester)Cl2] (A) and [Os(h 6-p-cymene) (h1-N,N'-(S)-phenylalanine amido) Cl] (B), were prepared by an ultr...
HY沸石超笼“半三明治”环戊二烯铁物种的接枝(Grafting of “Half-sandwich” Cyclopentadiene Iron Species into HY Supercage)
HY沸石 Cp2Fe 接枝反应 半三明治 环戊二烯铁
2010/8/25
在真空条件下研究了Cp2Fe在HY沸石表面的接枝反应,并用原位FTIR、ICP、XRD、TPD-MS和UV-Vis DRS等方法对接枝产物的组成、结构及性质进行了表征。结果表明,在低于423 K的温度下,Cp2Fe可以强吸附在沸石的超笼内,并被氧化为Cp2Fe+阳离子;当在423 K长时间加热时,Cp2Fe+可与超笼表面的酸性中心发生化学反应,脱除一个环戊二烯基团,在沸石超笼形成“半三明治”环戊二...