New Mn(Ⅱ)Cu(Ⅱ)Mn(Ⅱ) trinuclear complexes with an S = 9/2 ground state

MIAO Mingming; CHENG Peng; LIAO Daizheng; JIANG Zonghui; WANG Genglin

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New Mn(Ⅱ)Cu(Ⅱ)Mn(Ⅱ) trinuclear complexes with an S = 9/2 ground state

机译：S = 9/2基态的新型Mn（Ⅱ）Cu（Ⅱ）Mn（Ⅱ）三核配合物

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The subject of design and synthesis of molecular-based ferromagnets is one of the main challenges in the field of molecular materials. Along this line, the first important step is synthesizing molecular entities with a large spin in the ground state. Recently, Kahn has pointed out that it is possible for ABA linear trinuclear species with local spins 2S_A > S_B + 1/2 to stabilize a state of high-spin multiplicity with no need of imposing ferromagnetic interactions between the nearest neighbor magnetic centers. Several ABA trinuclear complexes with [Cu(pba)]~(2-) bridge (where pba stands for propylene-1, 3-bis (oxamato)) have been reported. However, to our knowledge, no o-phenylene-bis(oxamato) bridged Mn(Ⅱ)Cu(Ⅱ)Mn(Ⅱ) complex has been reported. This note deals with the synthesis and characterization of three new heterotrinuclear complexes, namely {[Mn(L)_2]_2[Cu(ebo)]}-(ClO_4)_2 (where ebo = o-phenylene-bis(oxamado), L = 1, 10-phenanthroline (phen), 5-nitro-1, 10-phenanthroline (NO_2-phen) and 2, 2′-bipyridyl (bpy)). The magnetic analysis of {[Mn(phen)_2]_2 [Cu(ebo)]}(ClO_4)_2 • H_2O indicates that there is an antiferromagnetic coupling between manganese(Ⅱ) and copper(Ⅱ) ions. The χ_M T versus T plot exhibits a minimum at about 198 K, which is the characteristic of this kind of complex with an irregular spin-state structure.

机译：分子基铁磁体的设计与合成是分子材料领域的主要挑战之一。沿着这条路线，第一步很重要，就是合成基态中具有较大自旋的分子实体。最近，卡恩（Kahn）指出，具有局部自旋2S_A> S_B + 1/2的ABA线性三核物种有可能稳定高自旋多重性状态，而无需在最近的相邻磁中心之间施加铁磁相互作用。已经报道了几种带有[Cu（pba）]〜（2-）桥的ABA三核配合物（其中pba代表丙烯-1、3-bis（恶唑））。然而，据我们所知，没有报道邻邻亚苯基-双（恶唑）桥联的Mn（Ⅱ）Cu（Ⅱ）Mn（Ⅱ）配合物。本说明涉及三种新的异三核配合物，即{[Mn（L）_2] _2 [Cu（ebo）]}-（ClO_4）_2的合成和表征（其中ebo =邻亚苯基-双（恶草），L ＝ 1、10-菲咯啉（phen），5-硝基-1、10-菲咯啉（NO_2-phen）和2、2′-联吡啶（bpy））。 {[Mn（phen）_2] _2 [Cu（ebo）]}（ClO_4）_2•H_2O的磁性分析表明，锰（Ⅱ）和铜（Ⅱ）离子之间存在反铁磁耦合。 χ_MT与T的关系图在198 K处显示出最小值，这是这种具有不规则自旋态结构的复合物的特征。

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来源
《Chinese science bulletin》 |1996年第12期|p.995-999|共5页
作者
MIAO Mingming; CHENG Peng; LIAO Daizheng; JIANG Zonghui; WANG Genglin;
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作者单位

Department of Chemistry, Nankai University, Tianjin 300071, China;

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正文语种 eng
中图分类自然科学现状及发展;
关键词
Mn(Ⅱ)Cu(Ⅱ)Mn(Ⅱ); antiferromagnetic coupling; irregular spin state structure;

机译：Mn（Ⅱ）Cu（Ⅱ）Mn（Ⅱ）;反磁耦合;不规则自旋态结构;

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1. One-pot synthesis of an Mn(III)-Cu(II)-Mn(III) trinuclear heterometallic compound formed by Mn...S-Cu-S...Mn supramolecular interactions:Crystal structure of [{Mn~(III)(salph)(H_2O)}_2{Cu~(II)(mnt)_2}] centre dot 4DMF [J] . VEDICHI MADHU, SAMAR K DAS Journal of chemical sciences . 2006,第6期

机译：一锅合成由Mn ... S-Cu-S ... Mn超分子相互作用形成的Mn（III）-Cu（II）-Mn（III）三核异金属化合物：[{Mn〜（III ）（salph）（H_2O）} _ 2 {Cu〜（II）（mnt）_2}]中心点4DMF
2. Syntheses, structures, and properties of trinuclear complexes [M(bpca)(2){M '(hfaC)(2)}(2)], constructed with the complexed bridging ligand [M(bpca)(2)] [M, M ' = Ni(II), Mn(II); Cu(II), Mn(II); Fe(II), Mn(II); Ni(II), Fe(II); and Fe(II), Fe(II); hbp [J] . Kamiyama A., Noguchi T., Kajiwara T., Inorganic Chemistry: A Research Journal that Includes Bioinorganic, Catalytic, Organometallic, Solid-State, and Synthetic Chemistry and Reaction Dynamics . 2002,第3期

机译：三核配合物[M（bpca）（2）{M'（hfaC）（2）}（2）]的合成，结构和性质，由复合桥联配体[M（bpca）（2）] [M， M'= Ni（II），Mn（II）; Cu（II），Mn（II）; Fe（II），Mn（II）; Ni（II），Fe（II）;和Fe（II），Fe（II）; hbp
3. One-pot synthesis of an Mn(III)-Cu(II)-Mn(III) trinuclear heterometallic compound formed by Mn$cdots$S-Cu-S$cdots$Mn supramolecular interactions: Crystal structure of [{MnIII(salph)(H2O)}2{CuII(mnt)2}]$cdot$4DMF [J] . Samar K Das1, Vedichi Madhu Journal of Chemical Sciences . 2006,第6期

机译：一锅合成由Mn $ cdots $ S-Cu-S $ cdots $ Mn超分子相互作用形成的Mn（III）-Cu（II）-Mn（III）三核异金属化合物：[{MnIII（salph）的晶体结构（H2O）} 2 {CuII（mnt）2}] $ cdot $ 4DMF
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机译：外延LA_（2/3）CA_（1/3）MNO_3 / YBA_2CU_3O_（7-DELTA）/ LA_（2/3）CA_（1/3）MNO_3和LA_（2/3）CA_（1/3）CA_（1 /）中的磁各向异性3）MNO_3 / LA_（1/3）CA_（2/3）MNO_3 / YBA_2CU_3O_（7-DELTA）三层结构
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6. Ground State Electronic and Magnetic Properties of a μ3-Oxo Bridged Trinuclear Cu(II) Complex: Correlation to the Native Intermediate of the Multicopper Oxidases [O] . Jungjoo Yoon, Edward I. Solomon -1

机译：μ3-Oxo桥联的三核Cu（II）配合物的基态电子和磁性性质：与Multicopper氧化酶的天然中间体的相关性。
7. The effect of the orientation of the Jahn–Teller distortion on the magnetic interactions of trinuclear mixed-valence Mn(ii)/Mn(iii) complexes [O] . Rahman Bikas, Elaheh Shahmoradi, Santiago Reinoso, 2019

机译：Jahn-Teller畸变取向对三核混合价Mn（II）/ Mn（III）配合物的磁相互作用的影响

New Mn(Ⅱ)Cu(Ⅱ)Mn(Ⅱ) trinuclear complexes with an S = 9/2 ground state

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