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首页> 外文期刊>Crystal growth & design >Toward a new type of multifunctional metal-organic systems based on nucleobase analogues: First results derived from the use of aliphatic α,ω-dicarboxylates
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Toward a new type of multifunctional metal-organic systems based on nucleobase analogues: First results derived from the use of aliphatic α,ω-dicarboxylates

机译:建立一种基于核碱基类似物的新型多功能金属有机体系:使用脂肪族α,ω-二羧酸盐获得的第一个结果

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摘要

Five new transition metal complexes, containing the purine-mimetic ligands 7-amine-1,2,4-triazolo[1,5-a]pyrimidine (7atp) and 4,5-dihydro-5-oxo-1,2,4- triazolo[1,5-a]pyrimidine (5HtpO), and also malonate (mal ~(2-)) and succinate (suc ~(2-)) as secondary ligands are reported. Their formula are [Mn _2(μ-7atp) _2(μ-mal) _2(H _2O) _2] (1), [Zn _2(μ-7atp) _2(μ- mal) _2(H _2O) _2] (2), [Cu _2(5HtpO) _2(mal) _2(H _2mal) _2(μ-H _2O) _2] (3), [Cu _2(μ-5tpO) _2(μ- Hsuc) _2(H _2O) _2] (4), and [Cd _2(μ- 5tpO) _2(μ _4-suc)(H _2O) _2] _n (5). Single-crystal X-ray analysis show that compounds 1-4 feature all dinuclear units with different topologies while compound 5 exhibits a 3D-network with small-diameter pores. The variety of coordination modes displayed by both triazolopyrimidine derivatives together with the bridging capability of the aliphatic α,ω-dicarboxylates used lead to compounds with interesting structural features and physical properties. The Cu(II) malonate dimer 3 exhibits weak ferromagnetic interactions (J = +1.5 cm ~(-1)) while a weak and a moderately strong antiferromagnetism are displayed, respectively, in the Mn(II) (J = -2.1 cm ~(-1)) and Cu(II) succinate dimer 4 (J = -109.7 cm ~(-1)). On the other hand, solid-state photoluminescent emission is observed for the Zn(II) compound with a Stokes shift of 73 nm.
机译:五个新的过渡金属配合物,包含嘌呤模拟配体7-胺-1,2,4-三唑并[1,5-a]嘧啶(7atp)和4,5-二氢-5-氧-1,2,4 -报道了三唑并[1,5-a]嘧啶(5HtpO),以及丙二酸酯(mal〜(2-))和琥珀酸酯(suc〜(2-))作为二级配体。他们的公式是[Mn _2(μ-7atp)_2(μ-mal)_2(H _2O)_2](1),[Zn _2(μ-7atp)_2(μ-mal)_2(H _2O)_2]( 2),[Cu _2(5HtpO)_2(mal)_2(H _2mal)_2(μ-H_2O)_2](3),[Cu _2(μ-5tpO)_2(μ-Hsuc)_2(H _2O) _2](4)和[Cd _2(μ-5tpO)_2(μ_4-suc)(H _2O)_2] _n(5)。单晶X射线分析表明,化合物1-4具有所有具有不同拓扑结构的双核单元,而化合物5则显示了具有小直径孔的3D网络。由三唑并嘧啶衍生物显示的各种配位模式以及所用脂族α,ω-二羧酸酯的桥连能力导致化合物具有有趣的结构特征和物理性质。丙二酸铜(II)二聚体3表现出弱的铁磁相互作用(J = +1.5 cm〜(-1)),而在Mn(II)中分别显示出弱的和中等强度的反铁磁性(J = -2.1 cm〜 (-1))和琥珀酸铜(II)二聚体4(J = -109.7 cm〜(-1))。另一方面,观察到具有73 nm斯托克斯位移的Zn(II)化合物的固态光致发光。

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