Inside-Out/Outside-In Tunability in Nanosized Lanthanide-Based Molecular Cluster-Aggregates: Modulating the Luminescence Thermometry Performance via Composition Control,ACS Applied Materials & Interfaces

当前位置： X-MOL 学术 › ACS Appl. Mater. Interfaces › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Inside-Out/Outside-In Tunability in Nanosized Lanthanide-Based Molecular Cluster-Aggregates: Modulating the Luminescence Thermometry Performance via Composition Control
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2021-09-24 , DOI: 10.1021/acsami.1c13684
Diogo A Gálico ₁ , Muralee Murugesu ₁

Affiliation

Modulating the optical property of a material via structural modification is a powerful tool for obtaining the desired optical output. If a material can be tuned inside (core) and outside (outer shell), then the degree of control is greater toward application. Herein, we present a lanthanide-based nanosized molecular cluster aggregate (MCA) that allows fine-tuning of the inner core via composition control akin to nanoparticles. At the same time, the tunable outer shell enables light-harvesting properties similar to molecular systems. As such {Eu₄Tb₁₆}, {Eu₃Gd₅Tb₁₂}, {Eu₂Gd₁₀Tb₈}, and {Eu₁Gd₁₅Tb₄} compositions were synthesized, and their photophysical properties were investigated in solution and in the solid state. Controlling the composition and spacing of the emitter ions with the optically silent Gd^III ions results in a decrease in the Tb^III → Eu^III energy-transfer process efficiency. Consequently, ratiometric luminescence thermometry performance is fine-tuned to reach a maximum relative sensitivity of 4.17% °C^–1 at 36 °C for the {Eu₄Tb₁₆} MCA. This study demonstrates that the optical properties are intrinsic to individual MCA species rather than a collective intermolecular effect. The color change observed close to room temperature for {Eu₂Gd₁₀Tb₈} suggests potential applications such as multistage anticounterfeiting technology.

中文翻译：

基于纳米镧系元素的分子簇聚集体的由内向外/由外向内可调性：通过成分控制调节发光测温性能

通过结构改性来调制材料的光学特性是获得所需光输出的有力工具。如果一种材料可以在内部（核心）和外部（外壳）进行调整，那么对应用程序的控制程度就更大。在此，我们提出了一种基于镧系元素的纳米级分子簇聚集体 (MCA)，它允许通过类似于纳米粒子的成分控制来微调内核。同时，可调外壳能够实现类似于分子系统的光捕获特性。因此{Eu ₄ Tb ₁₆ }、{Eu ₃ Gd ₅ Tb ₁₂ }、{Eu ₂ Gd ₁₀ Tb ₈ }和{Eu ₁ Gd ₁₅合成了Tb ₄ } 组合物，并在溶液和固态下研究了它们的光物理性质。用光学沉默的 Gd ^III离子控制发射极离子的组成和间距会导致 Tb ^III → Eu ^III能量转移过程效率的降低。因此，比例发光测温性能经过微调，以达到{Eu ₄ Tb ₁₆ } MCA在 36 °C 时的最大相对灵敏度 4.17% °C ^–1。这项研究表明，光学特性是单个 MCA 物种固有的，而不是集体分子间效应。{Eu 在接近室温时观察到的颜色变化₂ Gd ₁₀ Tb ₈ } 暗示了多级防伪技术等潜在应用。

更新日期：2021-10-06

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11