Ion size dominated 1D and 2D Salen lanthanide coordination complexes and their luminescence

Ion size dominated 1D and 2D Salen lanthanide coordination complexes and their luminescence
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离子尺寸主导的一维和二维 Salen 镧系元素配位化合物及其发光

DOI:
10.1016/j.poly.2007.08.011
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发表时间:
2007-11
期刊:
影响因子:
2.6
通讯作者:
Hou, Guang-Feng
Hou, Guang-Feng
中科院分区:
化学3区
文献类型:
--
作者:
Gao, Jin-Sheng;Gao, Ting;Yan, Peng-Fei;Li, Guang-Ming;Hou, Guang-Feng

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Ln(NO3)3·6 H2O(Ln=Pr,Nd,Sm,Eu,Tb和Lu)与H2salen [H2salen=N,N′-亚乙基双水杨醛亚胺]之间的刘易斯酸碱加成反应生成了一系列配位聚合物结构.晶体结构分析表明,Salen在这些化合物中起着桥连配体的作用.镧系离子的大小控制了这些Salen镧系配合物的结构。报道了两个具有代表性的一维和二维拓扑结构的配合物[Pr(H2salen)(NO3)3(CH 3OH)2]n(1)和[Ln(H2salen)1.5(NO3)3]n[Ln=Pr(2),Nd(3),Sm(4),Eu(5),Tb(6)和Lu(7)]。配合物4和配合物5的发光光谱均呈现出典型的金属中心发射谱线。然而,无论是在溶液中还是在络合物6的固态中,都没有观察到铽(III)离子的特征发光。
Lewis acid/base addition between Ln(NO3)3·6H2O (Ln=Pr, Nd, Sm, Eu, Tb and Lu) and H2salen [H2salen=N,N′-ethylenebis(salicylideneimine)] gives rise to an array of coordination polymeric structures. Crystal structural analysis reveals that Salen effectively functions as a bridging ligand in these compounds. The size of the lanthanide ions controls the structures of these Salen lanthanide complexes. Two representative structures with one dimensional and two dimensional topologies, viz. [Pr(H2salen)(NO3)3(CH3OH)2]n(1) and [Ln(H2salen)1.5(NO3)3]n[Ln=Pr (2), Nd (3), Sm (4), Eu (5), Tb (6) and Lu (7)] are reported. Luminescent spectra of complexes 4 and 5 exhibit characteristic metal-centered emission lines. However, the characteristic luminescence of the terbium(III) ion is not observed either in solution or in the solid state of complex 6.
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