A unique 2-D hollow sheet structure and magnetic behavior of a cyanide- and triamine-bridged (MnCrIII)-Cr-II ferrimagnet

Kaneko W; Kitagawa S; Ohba M

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A unique 2-D hollow sheet structure and magnetic behavior of a cyanide- and triamine-bridged (MnCrIII)-Cr-II ferrimagnet

机译：氰化物和三胺桥连的（MnCrIII）-Cr-II铁氧体的独特二维中空板结构和磁性

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A 2-D cyanide- and triamine-bridged (MnCrIII)-Cr-II ferrimagnet, [Mn-3(dien)(2)(H2O)(2)][Cr(CN)(6)](2) center dot 4H(2)O (1), has been prepared by the combination of Mn2+, diethylenetriamine (dien) co-ligand and [Cr(CN)(6)](3-). This compound forms a unique 2-D hollow sheet structure constructed by 1-D ribbon networks on the basis of triamine (dien)-bridged trinuclear Mn-II units. Compound 1 readily looses all lattice water molecules and irreversibly changes to a dehydrated form, [Mn-3(dien)(2)(H2O)(2)][Cr(CN)(6)](2) (1a), in the air. Cryornagnetic studies of 1 and 1a reveal an antiferromagnetic interaction between Cr-III and Mn-II ions, and an unusual long-range ferrimagnetic ordering below 30 K (1) and 40 K (1a) with multiple magnetic phase changes below T-c. MCD spectra of 1a show a strong Faraday ellipticity associated with the LMCT band of the Cr-CN below 300 nm. Faraday ellipticity is remarkably enhanced below T-C in line with the characteristics long-range ferrimagnetic ordering. (c) 2006 Elsevier Ltd. All rights reserved.

机译：2-D氰化物和三胺桥接（MnCrIII）-Cr-II铁氧体，[Mn-3（dien）（2）（H2O）（2）] [Cr（CN）（6）]（2）中心点4H（2）O（1）是通过Mn2 +，二亚乙基三胺（dien）共配体和[Cr（CN）（6）]（3-）的组合制备的。该化合物形成一种独特的2-D中空片状结构，该结构是由一维带状网络基于三胺（dien）桥联的三核Mn-II单元构建的。化合物1容易失去所有晶格水分子，并且不可逆地变为脱水形式[Mn-3（dien）（2）（H2O）（2）] [Cr（CN）（6）]（2）（1a），空气。对1和1a的冷冻研究表明，Cr-III和Mn-II离子之间存在反铁磁相互作用，并且在30 K（1）和40 K（1a）以下具有异常的远距离亚铁磁有序，并且在T-c以下具有多个磁相变化。 1a的MCD光谱显示出与300 nm以下Cr-CN的LMCT谱带相关的强法拉第椭圆率。法拉第椭圆率在T-C以下显着增强，这符合远距离亚铁磁有序特性。（c）2006 Elsevier Ltd.保留所有权利。

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《Polyhedron: The International Journal for Inorganic and Organometallic Chemistry》 |2007年第11期|共7页
作者
Kaneko W; Kitagawa S; Ohba M;
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正文语种 eng
中图分类化学;
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ferrimagnet; cyanide-bridge; structural change; magnetic change; dehydration; PRUSSIAN BLUE ANALOGS; FIELD;

机译：铁磁性氰化物桥结构变化磁性变化脱水普鲁士蓝模拟场;

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机译：氰化物和三胺桥连的（MnCrIII）-Cr-II铁氧体的独特二维中空板结构和磁性
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A unique 2-D hollow sheet structure and magnetic behavior of a cyanide- and triamine-bridged (MnCrIII)-Cr-II ferrimagnet

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