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首页> 外文期刊>Crystal growth & design >Coordination assemblies of Co ~(II)/Ni ~(II)/ Zn ~(II)/Cd ~(II) with succinic acid and bent connectors: Structural diversity and spin-canted antiferromagnetism
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Coordination assemblies of Co ~(II)/Ni ~(II)/ Zn ~(II)/Cd ~(II) with succinic acid and bent connectors: Structural diversity and spin-canted antiferromagnetism

机译:Co〜(II)/ Ni〜(II)/ Zn〜(II)/ Cd〜(II)与琥珀酸和弯曲连接基的配位组装:结构多样性和自旋倾斜反铁磁性

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摘要

Four bent ligands, (i) 4,4′-abpt, (ii) 4,4′-Hbpt, (iii) 3,4′-Hbpt, and (iv) 3,3′-Hbpt, as well as H _2suc (succinic acid) have been utilized to construct seven coordination polymers: [Co(suc)(4,4′-abpt)(H _2O) _2]?H _2O (1), [M(suc)(4,4′-Hbpt)(H _2O)]?2H _2O (M = Co for 2, Ni for 3), [Cd(suc)(4,4′-Hbpt) _2(H _2O) _2] (4), [Co(suc)(3,4′-Hbpt)(H _2O) _3]?H _2O (5), [Zn(suc)(3,4′-Hbpt)] (6), and [Zn(suc) _(0.5)(3,3′-bpt) (H _2O)] (7) (4,4′-abpt = 4-amino-3,5-bis(4-pyridyl)-1,2,4- triazole, 4,4′-Hbpt = 1H-3,5-bis(4-pyridyl)-1,2,4-triazole, 3,4'-Hbpt = 1H-3-(3-pyridyl)-5-(4-pyridyl)-1,2,4-triazole, and 3,3′-Hbpt = 1H-3,5-bis(3-pyridyl)-1,2,4-triazole). The crystal structure analysis reveals that 1-3 form similar two-dimensional (2D) layer structures, where the adjacent metal centers are connected by a syn-anti carboxylate bridge from suc ligands to furnish a succinate-metal chain, which is further interlinked by bent ligands. 4-7 form different 1D chains via suc anions, and bpt isomers display versatile coordination modes. The magnetic behavior of compounds 1-3 and 5 was studied, and it indicated the existence of interesting spin-canting behavior, where the bent ligands tilting the neighbor metal center could give further contribution to the canting effect. In addition, the luminescent properties of 4, 6, and 7 have been investigated in the solid state at room temperature.
机译:四个弯曲的配体(i)4,4'-abpt,(ii)4,4'-Hbpt,(iii)3,4'-Hbpt和(iv)3,3'-Hbpt以及H _2suc (琥珀酸)已用于构建七种配位聚合物:[Co(suc)(4,4'-abpt)(H _2O)_2]?H _2O(1),[M(suc)(4,4'- Hbpt)(H _2O)] 2H _2O(M = Co表示2,Ni表示3),[Cd(suc)(4,4'-Hbpt)_2(H _2O)_2](4),[Co(suc )(3,4'-Hbpt)(H _2O)_3]?H _2O(5),[Zn(suc)(3,4'-Hbpt)](6)和[Zn(suc)_(0.5) (3,3'-bpt)(H _2O)](7)(4,4'-abpt = 4-氨基-3,5-双(4-吡啶基)-1,2,4-三唑,4,4 ′-Hbpt = 1H-3,5-双(4-吡啶基)-1,2,4-三唑,3,4'-Hbpt = 1H-3-(3-吡啶基)-5-(4-吡啶基)- 1,2,4-三唑和3,3'-Hbpt = 1H-3,5-双(3-吡啶基)-1,2,4-三唑)。晶体结构分析显示1-3形成相似的二维(2D)层结构,其中相邻的金属中心通过自suc配体的顺-抗羧酸盐桥连接以提供琥珀酸盐-金属链,并通过弯曲的配体。 4-7通过蔗糖阴离子形成不同的一维链,而bpt异构体显示出多种配位模式。研究了化合物1-3和5的磁行为,表明存在有趣的自旋行为,其中弯曲的配体使邻近金属中心倾斜可进一步促进倾斜作用。另外,已经在室温下在固态下研究了4、6和7的发光性质。

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