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1 INTRODUCTION There has been increasing interest in molecular- based magnetic materials, in which the combination of metal ions and organic radicals are used to construct assembled systems[1, 2]. Nitroxide radicals are normally used as spin carriers … 相似文献
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含多原子桥联异双核配合物的研究对阐明生物体中的电子转移过程以及金属酶活性中心的本质有重要意义,基于草酰胺根的有效成桥功能,Kahn使用N,N′-双(3-氨丙基)草酰胺合铜(Cu(oxpn))作为双齿单核断片合成了双铜配合物[Cu(oxpn)Cu(bpy)](ClO_4)_2,最近,在我们实验室也用此单核断片合成了端接phen、NO_2-phen的双铜配合物和端接不同配体 相似文献
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IntroductionThemajorresearchaimsinthefieldofmolecularmag netismareontheonehandthedesignofmolecularassembliesthatexhibitaspontaneousmagnetizationandontheotherhandtherationalizationofmagnetostructuralcorrelation .1Polynuclearmacrocycliccomplexesandnitroxideradicalmetalliccomplexesaretwoactivefieldsofresearchfordesign ingandsynthesizingnewmagneticmaterials.2 6Polynuclearmacrocycliccomplexescontainingmul tiatomicbridgesuchasphenolateoxygen ,oxamidoandoxi amtogroupshavebeenconsiderablyinvestigated… 相似文献
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本文合成并研究了一个四核锰配合物,[Mn4（HL）4（MeOH）4（SCN）2]·3MeOH（1）和一个基于Mn4单元的一维链锰配合物,[Mn4（HL）4（MeOH）4（N（cN）2）2]·2．5MeOH（2）（H3L=2,6-二羟基-4-甲基苯酚）．配合物1和2分别属于三斜晶系P-1空间群和单斜晶系P21／n空间群．配合物1由混价四核立方烷单元组成,它包含两个MnⅡ离子和两个MnⅢ。离子．配合物2包含类似的[Mn4]单元,通过两个N（CN）2离子连成一维链结构．变温磁化率研究表明配合物1和2的锰离子之间存在铁磁性偶合作用．对配合物进行交流磁化率的测试,低温时的虚部信号表明两个配合物均表现出缓慢磁弛豫现象． 相似文献
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1 INTRODUCTION The scope of exploring magnetic properties of compounds arising from the combination of tran- sition metal with nitroxide radicals is steadily in- creasing. Considerable efforts have been directed in preparing and characterizing metal-radi… 相似文献
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IntroductionNitronylnitroxidesactingasusefulparamagneticbuild ingblockshavebeenextensivelyusedtoassemblemolecularmagneticmaterialsinthepastfewyears .1 4 However,theirweaklybasiccharacterstronglylimitstheircoordinationabili ty .Thishasledtothedevelopmentoffunctionalizednitronylnitroxideradicalsinwhichastrongcoligandisincorporated .Amongfunctionalizednitronylnitroxideradicalligands ,thepyridyl substitutednitroxideradicalsareextensivelyusedtoassembleextendedcoordinationgeometrieswithchangingmagne… 相似文献
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