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首页> 外文期刊>ACS Omega >Lanthanide-Oligomeric Brush Films: From Luminescence Properties to Structure Resolution
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Lanthanide-Oligomeric Brush Films: From Luminescence Properties to Structure Resolution

机译：镧系低聚物刷膜：从发光特性到结构分辨率

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Lanthanide (Ln) based luminescent materials are experiencing an increasing interest in their applications in several fields. In this study, we report a series of new lanthanide-oligomeric brush films, supported on quartz substrates and prepared using a layer-by-layer method (LbL). Oligomeric brush films are composed of small oligomers from our previously reported coordination polymers [x-EuL] and [x-TbL] (with x = 1, 3, and 5 generations of Ln complexes), which are grown perpendicularly from a carboxylate self-assembled monolayer. Oligomers composed of our previously described helical lanthanide complex LnL (Ln: Eu and Tb) as a luminescent moiety and benzene-1,4-dicarboxylate acid (bdc) used as a linker. Mixed films having the fifth-generation Ln complexes composed of equimolar mixture of Eu and Tb ions were prepared. Oligomeric brush films are highly transparent and exhibited a colored emission under UV irradiation. Pure Ln (Eu or Tb) films showed a strong luminescence from the Ln ions. Their luminescent properties depended on the number of lanthanide layers in the films composed of the first to third generations of lanthanide complexes. Then, the increase of the complex layers induced no difference in the luminescent properties. An energy transfer from Tb to Eu ions in the mixed films indicated a short distance between lanthanide ions of a fifth layer. The structural analysis together with the observed luminescent properties and some previous studies allowed to clarify the disposition of the oligomers in the films.
机译：基于镧系元素（Ln）的发光材料在多个领域中的应用越来越受到关注。在这项研究中，我们报告了一系列新的镧系低聚物刷膜，这些膜支撑在石英基板上，并使用逐层方法（LbL）制备。低聚刷膜由来自我们先前报道的配位聚合物[x-EuL]和[x-TbL]（具有x = 1、3和5代Ln络合物）的小低聚物组成，它们是从羧酸盐自组装的单层。由我们先前描述的螺旋型镧系元素络合物LnL（Ln：Eu和Tb）作为发光部分和苯-1,4-二羧酸（bdc）作为连接体组成的低聚物。制备具有由Eu和Tb离子的等摩尔混合物组成的第五代Ln络合物的混合膜。低聚物刷膜是高度透明的，并且在紫外线照射下表现出有色发射。纯的Ln（Eu或Tb）膜显示出Ln离子的强发光。它们的发光性能取决于第一代至第三代镧系元素络合物组成的薄膜中镧系元素的层数。然后，复合层的增加不会引起发光性质的差异。混合膜中从Tb到Eu离子的能量转移表明第五层的镧系元素离子之间的距离很短。结构分析以及观察到的发光特性和一些先前的研究可以阐明低聚物在膜中的位置。

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