首例Ga~Ⅲ-Dy~Ⅲ单分子磁体
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- 英文论文题名：First Heterometallic Ga~Ⅲ-Dy~Ⅲ Single-Molecule Magnets
- 论文作者：陈斯淮 ; V.Mereacre ; C.E.Anson ; 何长振 ; A.K.Powell
- 英文论文作者：Sihuai Chen ; V.Mereacre ; C.E.Anson ; Z.He ; A.K.Powell ; Fujian Institute of Research on the Structure of Matter ; Chinese Academy of Sciences ; Institute of Inorganic Chemistry ; Karlsruhe Institute of Technology ; Institute of Nanotechnology ; Karlsruhe Institute of Technology
- 年：2016
- 作者机构：中国科学院福建物质结构研究所;Institute of Inorganic Chemistry,Karlsruhe Institute of Technology;Institute of Nanotechnology,Karlsruhe Institute of Technology;
- 论文关键词：单分子磁体 ; 簇合物 ; 磁学性质 ; 镝
- 会议召开时间：2016-07-01
- 会议录名称：中国化学会第30届学术年会摘要集-第十六分会：晶体工程
- 语种：中文
- 分类号：O641.4
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会-第十六分会 ; 晶体工程
- 会议地点：中国辽宁大连
- 主办单位：中国化学会
- 学会名称：中国化学会
- 页数：1
- 文件大小：244k
- 原文格式：D
- 会议级别：全国
摘要
以N-丁基二乙醇胺(nbdeaH_2)为配体,通过辅助自组装反应和溶剂热法合成两组异金属多核簇合物。其中[M_4M'_2(μ_3-OH)_2(nbdea)_4(C_6H_5CO_2)_8]·MeCN(M=Ga~Ⅲ,M'=Dy~Ⅲ(2),M=Fe~Ⅲ,M'=Y~Ⅲ(3))与己发表的3d-4f异金属簇合物[Fe_4Dy_2(μ_3-OH)_2(nbdea)_4(C_6H_5CO_2)_8]·MeCN(1)同构~([1]),而[M_4M'_4(μ_3-OH)_4(nbdea)_4(m-CH_3C_6H_4CO_2)_(12)]·nMeCN(M=Ga~Ⅲ,M'=Dy~Ⅲ,n=4(5),M=Fe~Ⅲ,M'=Y~Ⅲ,n=1(6))与己发表的3d-4f异金属簇合物[Fe_4Dy_4(μ_3-OH)_4(nbdea)_4(m-CH_3C_6H_4CO_2)_(12)]·MeCN(4)同构~([1])。磁性测试表明,在化合物{Ga_4Dy_2}(2)与{Ga_4Dy_4}(5)中,Dy~Ⅲ-Dy~Ⅲ之间存在反铁磁耦合相互作用,而在化合物{Fe_4Y_2}(3)与{Fe_4Y_4}(6)中,Fe~Ⅲ-Fe~Ⅲ之间同样也存在反铁磁相互作用。由此可推测,在己发表的化合物{Fe_4Dy_2}(1)与{Fe_4Dy_4}(4)中,Fe~Ⅲ-Dy~Ⅲ之间应存在铁磁耦合相互作用。簇合物{Ga_4Dy_2}(2)和{Ga_4Dy_4}(5)表现出单分子磁体行为,其中(Ga_4Dy_2)(2)的有效能垒(U_(eff))与己知的同构簇合物{Fe_4Dy_2}(1)十分接近。这也是首次在Ga~Ⅲ-Dy~Ⅲ异金属簇合物中发现单分子磁体的弛豫现象。
The compounds of the system[M_4M'_2(μ_3-OH)_2(nbdea)_4(C_6H_5CO_2)_8]·MeCN,where M = Ga~Ⅲ,M'= Dy~Ⅲ(2),M =Fe~Ⅲ,M' = Y~Ⅲ(3) are isostructural to the known[Fe_4Dy_2]compound(1).Those of the system[M_4M'_4(μ_3-OH)_4(nbdea)_4(m-CH_3C_6H_4CO_2)_(12)]·nMeCN,where M = Ga~Ⅲ,M' = Dy~Ⅲ,n = 4(5),M = Fe~Ⅲ,M' = Y~Ⅲ,n = 1(6) are isostructural to the[Fe_4Dy_4]compound(4).This allows for comparisons between single ion effects of the paramagnetic ions.The structures were determined using single crystal analysis.Magnetic susceptibility measurements reveal that the Ga~Ⅲ-Dy~Ⅲ compounds 2 and 5 are SMMs.The energy barrier for 2 is close to that for the known isostructural Fe_4Dy_2 compound(1),but with a significantly increased relaxation time.
The compounds of the system[M_4M'_2(μ_3-OH)_2(nbdea)_4(C_6H_5CO_2)_8]·MeCN,where M = Ga~Ⅲ,M'= Dy~Ⅲ(2),M =Fe~Ⅲ,M' = Y~Ⅲ(3) are isostructural to the known[Fe_4Dy_2]compound(1).Those of the system[M_4M'_4(μ_3-OH)_4(nbdea)_4(m-CH_3C_6H_4CO_2)_(12)]·nMeCN,where M = Ga~Ⅲ,M' = Dy~Ⅲ,n = 4(5),M = Fe~Ⅲ,M' = Y~Ⅲ,n = 1(6) are isostructural to the[Fe_4Dy_4]compound(4).This allows for comparisons between single ion effects of the paramagnetic ions.The structures were determined using single crystal analysis.Magnetic susceptibility measurements reveal that the Ga~Ⅲ-Dy~Ⅲ compounds 2 and 5 are SMMs.The energy barrier for 2 is close to that for the known isostructural Fe_4Dy_2 compound(1),but with a significantly increased relaxation time.
引文
[1]Chen,S.;Mereacre,V.;Prodius,D.;Kostakis,G.E.;Powell,A.K.Inorg.Chem.2015,54:3218.