N,N'-bis(salicylidene)propane-1,2-diamine lanthanide(III) coordination polymers: Synthesis, crystal structure and luminescence properties
N,N'-bis(salicylidene)propane-1,2-diamine lanthanide(III) coordination polymers: Synthesis, crystal structure and luminescence properties
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DOI：
10.1016/j.jssc.2008.11.016
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发表时间：
2009-02
影响因子：
3.3
通讯作者：
Wenbin Sun;Pengfei Yan;Guangming Li;Hui-Jun Xu;Ju-wen Zhang
中科院分区：
文献类型：
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作者：
Wenbin Sun;Pengfei Yan;Guangming Li;Hui-Jun Xu;Ju-wen Zhang
Ln(NO3)3·6H2O与H2L [H2L=N,N ' -双（水杨基）丙烷-1,2-二胺]反应生成了5种新的配位聚合物，即[Pr(H2L)(NO3)3(MeOH)] N(1)和[Ln(H2L)1.5(NO3)3] N [Ln=La (2), Eu (3), Sm(4)和Gd(5)]。晶体结构分析表明，H2L有效地作为桥接配体形成一维（1D）链和二维（2D）开框架聚合物。3和4的固态荧光光谱在室温下表现为典型的Eu（III）和Sm（III）离子的红色荧光，而2则表现为配体H2L的蓝色荧光。根据5的磷光光谱计算出配体H2L的最低三重态水平。对镧系聚合物中的能量传递机理进行了描述和讨论。
Reaction of Ln(NO3)3·6H2O with H2L [H2L=N,N′-bis(salicylidene)propane-1,2-diamine] gives rise to five new coordination polymers, viz. [Pr(H2L)(NO3)3(MeOH)]n(1) and [Ln(H2L)1.5(NO3)3]n[Ln=La (2), Eu (3), Sm (4) and Gd (5)]. Crystal structural analysis reveals that H2L effectively functions as a bridging ligand forming one-dimensional (1D) chain and two-dimensional (2D) open-framework polymers. Solid-state fluorescence spectra of 3 and 4 exhibit typical red fluorescence of Eu(III) and Sm(III) ions at room temperature while 2 emits blue fluorescence of ligand H2L. The lowest triplet level of ligand H2L was calculated on the basis of the phosphorescence spectrum of 5. The energy transfer mechanisms in the lanthanide polymers were described and discussed.