• 文献检索
  • 文档翻译
  • 深度研究
  • 学术资讯
  • Suppr Zotero 插件Zotero 插件
  • 邀请有礼
  • 套餐&价格
  • 历史记录
应用&插件
Suppr Zotero 插件Zotero 插件浏览器插件Mac 客户端Windows 客户端微信小程序
定价
高级版会员购买积分包购买API积分包
服务
文献检索文档翻译深度研究API 文档MCP 服务
关于我们
关于 Suppr公司介绍联系我们用户协议隐私条款
关注我们

Suppr 超能文献

核心技术专利：CN118964589B侵权必究
粤ICP备2023148730 号-1Suppr @ 2026

文献检索

告别复杂PubMed语法，用中文像聊天一样搜索，搜遍4000万医学文献。AI智能推荐，让科研检索更轻松。

立即免费搜索

文件翻译

保留排版，准确专业，支持PDF/Word/PPT等文件格式，支持 12+语言互译。

免费翻译文档

深度研究

AI帮你快速写综述，25分钟生成高质量综述，智能提取关键信息，辅助科研写作。

立即免费体验

AsMo7O27 桥联的双核夹心型杂多钼酸盐 Cr(III)和 Fe(III)：[MM'(AsMo7O27)2]12-的磁性，其中 MM' = FeFe、CrFe 和 CrCr。

AsMo7O27-bridged dinuclear sandwich-type heteropolymolybdates of Cr(III) and Fe(III): magnetism of [MM'(AsMo7O27)2]12- with MM' = FeFe, CrFe, and CrCr.

机构信息

Key Laboratory of Synthetic and Natural Functional Molecule Chemistry (Ministry of Education), Department of Chemistry, Northwest University, Xi'an, 710069, China.

出版信息

Inorg Chem. 2009 Nov 2;48(21):10275-80. doi: 10.1021/ic901416m.

DOI:10.1021/ic901416m
PMID:19795877
Abstract

Two new dinuclear sandwich-type heteropolymolybdates based on the mulitidendate inorganic fragment [AsMo(7)O(27)] and Cr(III) and Fe(III) ions, namely, the homometallic sandwich polyoxometalate (POM) (NH(4))(12)[Fe(2)(AsMo(7)O(27))(2)] x 12 H(2)O (1) and the first example of the "symmetrical" heterometallic Cr(III)-Fe(III) sandwich POM, (NH(4))(12)[FeCr(AsMo(7)O(27))(2)] x 13 H(2)O (2), were simultaneously synthesized in high yield. Their magnetic properties are thoroughly investigated together with the homometallic sandwich POM (NH(4))(12)[Cr(2)(AsMo(7)O(27))(2)] x 11 H(2)O (3). The chi(M)T values for compounds 1-3 at 300 K correspond well to the calculated spin-only values for Fe(III) (S = 5/2) and Cr(III) (S = 3/2) with g(Fe) = g(Cr) = 2. Upon cooling, the chi(M)T values decline monotonously and reach 0.14, 1.00, and 0.11 cm(3) K mol(-1) at 2.0 K for 1, 2, and 3, respectively, indicating a significant antiferromagnetic exchange between the magnetic centers with J = -2.09, -4.09, and -6.26 cm(-1), respectively, for 1, 2, and 3. The magnetic results clearly establish that compound 2 is formed by bimetallic Cr(III)-Fe(III) units and not by a mixture of the two antiferromagnetically coupled homometallic species. Their thermal properties are also characterized.

摘要

两种基于多齿无机片段[AsMo(7)O(27)]和 Cr(III)和 Fe(III)离子的新型双核夹心型多金属氧酸盐，即同核夹心聚氧金属酸盐(NH(4))(12)[Fe(2)(AsMo(7)O(27))(2)]x12H(2)O(1)和首例“对称”异核 Cr(III)-Fe(III)夹心 POM(NH(4))(12)[FeCr(AsMo(7)O(27))(2)]x13H(2)O(2)，在高产率下同时合成。还彻底研究了它们的磁性性质，以及同核夹心 POM(NH(4))(12)[Cr(2)(AsMo(7)O(27))(2)]x11H(2)O(3)。化合物 1-3 在 300 K 时的 chi(M)T 值与 Fe(III)(S = 5/2)和 Cr(III)(S = 3/2)的计算自旋仅值非常吻合，g(Fe) = g(Cr) = 2。冷却时，chi(M)T 值单调下降，分别在 2.0 K 时降至 0.14、1.00 和 0.11 cm(3)Kmol(-1)，表明磁性中心之间存在显著的反铁磁交换，J = -2.09、-4.09 和-6.26 cm(-1)，分别为 1、2 和 3。磁性结果清楚地表明，化合物 2 是由双金属 Cr(III)-Fe(III)单元组成的，而不是由两种反铁磁耦合的同核物种的混合物组成的。还对它们的热性能进行了表征。

相似文献

1
AsMo7O27-bridged dinuclear sandwich-type heteropolymolybdates of Cr(III) and Fe(III): magnetism of [MM'(AsMo7O27)2]12- with MM' = FeFe, CrFe, and CrCr.AsMo7O27 桥联的双核夹心型杂多钼酸盐 Cr(III)和 Fe(III)：[MM'(AsMo7O27)2]12-的磁性，其中 MM' = FeFe、CrFe 和 CrCr。
Inorg Chem. 2009 Nov 2;48(21):10275-80. doi: 10.1021/ic901416m.
2
Oxalato-bridged dinuclear complexes of Cr(III) and Fe(III): synthesis, structure, and magnetism of [(C2H5)4N]4[MM'(ox)(NCS)8] with MM' = CrCr, FeFe, and CrFe.
Inorg Chem. 2000 Aug 21;39(17):3771-6. doi: 10.1021/ic990439w.
3
New charge transfer salts based on bis(ethylenedithio)tetrathiafulvalene (ET) and ferro- or antiferromagnetic oxalato-bridged dinuclear anions: syntheses, structures and magnetism of ET5[MM'(C2O4)(NCS)8] with MM' = Cr(III)Fe(III), Cr(III)Cr(III).
Inorg Chem. 2001 Sep 24;40(20):5127-32. doi: 10.1021/ic010197b.
4
Fe2 and Fe4 clusters encapsulated in vacant polyoxotungstates: hydrothermal synthesis, magnetic and electrochemical properties, and DFT calculations.封装在缺位多金属氧酸盐中的Fe2和Fe4簇合物：水热合成、磁性和电化学性质以及密度泛函理论计算
Chemistry. 2008;14(10):3189-99. doi: 10.1002/chem.200700896.
5
Inter-string arrays of bimetallic assemblies with alternative Cu2+-Cl-Cu2+ and Cu-NC-M (M = Co3+, Fe+3, Cr+3) bridges: syntheses, crystal structure, and magnetic properties.具有交替的Cu2+-Cl-Cu2+和Cu-NC-M（M = Co3+、Fe+3、Cr+3）桥连的双金属组装体的串间阵列：合成、晶体结构和磁性
Inorg Chem. 2004 Mar 22;43(6):1969-75. doi: 10.1021/ic034897n.
6
High-nuclearity metal-cyanide clusters: synthesis, magnetic properties, and inclusion behavior of open-cage species incorporating [(tach)M(CN)3] (M = Cr, Fe, Co) complexes.高核金属氰化物簇合物：包含[(tach)M(CN)₃]（M = Cr、Fe、Co）配合物的笼状开放物种的合成、磁性及包合行为
Inorg Chem. 2003 Mar 10;42(5):1403-19. doi: 10.1021/ic026065f.
7
Parametrization of the magnetic behavior of the triangular spin ladder chains organically templated: (C2N2H10)[M(HPO3)F3] (M(III) = Fe, Cr, and V). Crystal structure and thermal and spectroscopic properties of the iron(III) phase.有机模板化三角自旋梯子链的磁行为参数化：(C2N2H10)[M(HPO3)F3]（M(III)=Fe、Cr和V）。铁(III)相的晶体结构、热性质和光谱性质。
Inorg Chem. 2006 Apr 17;45(8):3240-8. doi: 10.1021/ic051804o.
8
Synthesis, crystal structures and magnetic properties of cyanide- and phenolate-bridged [M(III)NiII]2 tetranuclear complexes (M=Fe and Cr).氰化物和酚盐桥联的[M(III)NiII]2四核配合物（M = Fe和Cr）的合成、晶体结构及磁性
Dalton Trans. 2005 Apr 21(8):1357-64. doi: 10.1039/b500168b. Epub 2005 Mar 14.
9
The role of diisopropanolamine (dipaH3) in cluster dimerisation and polymerisation: from spin frustrated S= 5 FeIII 6 clusters to the novel 1-D covalent polymer of mixed valence [CoII3CoIII] tetramers.二异丙醇胺（dipaH3）在簇二聚化和聚合中的作用：从自旋受挫的S = 5 FeIII 6簇到新型的混合价态[CoII3CoIII]四聚体的一维共价聚合物。
Dalton Trans. 2005 Oct 21(20):3344-52. doi: 10.1039/b504270d. Epub 2005 Aug 15.
10
Structural, magnetic, EPR, and electrochemical characterizations of a spin-frustrated trinuclear Cr(III) polyoxometalate and study of its reactivity with lanthanum cations.三核 Cr(III) 多金属氧酸盐的结构、磁性、EPR 和电化学特性及其与镧阳离子反应性的研究。
Inorg Chem. 2010 Mar 15;49(6):2851-8. doi: 10.1021/ic902341w.

引用本文的文献

1
Combined DFT and BS study on the exchange coupling of dinuclear sandwich-type POM: comparison of different functionals and reliability of structure modeling.双核夹心型 POM 交换耦合的 DFT 和 BS 联合研究：不同泛函的比较和结构建模的可靠性。
J Mol Model. 2012 May;18(5):2271-8. doi: 10.1007/s00894-011-1248-4.