Self-Healable Luminescent Materials Via a Supramolecular Self-Assembly Design
Self-Healable Luminescent Materials Via a Supramolecular Self-Assembly Design
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通过超分子自组装设计的自修复发光材料
DOI：
10.1016/j.cej.2021.131595
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发表时间：
2021
影响因子：
15.1
通讯作者：
Li Huanrong
中科院分区：
文献类型：
--
作者：
Yang Jing;Zhao Di;Yao Decui;Wang Yige;Li Huanrong
镧系离子（Ln3+）诱导的超分子自组装为构建先进的功能材料提供了一条强有力的途径，因为Ln3+具有高度可预测的配体配位性质和独特的物理性质。本文通过超分子自组装设计，将荧光中心掺入聚二甲基硅氧烷聚合物中合成功能发光材料，其中配位连接和氢键使材料在室温下具有快速自愈性和良好的力学性能。(i)在前驱体中引入Ln3+制备的自愈材料PIB- ln由于抑制或促进刺激后的“天线效应”，对酸碱蒸汽的刺激表现出响应（所制备的前驱体命名为PIB）。这种可逆响应的荧光材料在智能传感器中显示出有前景的应用；（ii）将三（2-烷基三氟丙酮）（TTA）铕（III）二水配合物（Eu(TTA)3·2H2O）与前驱体上的联吡啶基团键合，制备出高荧光材料PIB-Eu-TTA。与PIB-Ln相比，PIB-Eu-TTA具有更快的自愈性和更高的可拉伸性，这是由于PIB-Ln- tta具有更小的位阻，而PIB-Eu-TTA具有更好的荧光行为，这是由于PIB-Ln- tta排出了配位水分子，并有效地将能量从三（2-酰三氟丙酮）转移到Eu3+。基于优异的性能，PIB-Eu-TTA展示了在柔性和自修复导体和发光二极管（LED）中的示范应用，从而为电子皮肤和智能光学器件的未来发展提供了新的见解。
Supramolecular self-assembly induced by lanthanide ions (Ln3+) provides a powerful route to construct advanced functional materials, owing to the highly predictable nature of the Ln-ligand coordination and unique physical property of Ln3+. Herein, we synthesized functional luminescent materials by incorporation of fluorescent centers into polydimethylsiloxane polymers via supramolecular self-assembly design, where the coordination connection and hydrogen bond endow the materials with fast self-healability and good mechanical performance at room temperature: (i) the self-healing material PIB-Ln prepared by introducing Ln3+into the precursor exhibits response to stimuli of acid-base vapors on account of the inhibition or promotion of “antenna effect” upon stimulation (the as-prepared precursor is named as PIB). This reversibly responsive fluorochromic material displays promising application in smart sensors; (ii) the highly fluorescent material PIB-Eu-TTA was prepared by bonding Tris(2-thenoyltrifluoroacetonato) (TTA) europium(III) dihydrate complexes (Eu(TTA)3·2H2O) to the bipyridine groups on the precursor. Compared to PIB-Ln, PIB-Eu-TTA shows faster self-healing property and more high stretchable feature on account of the smaller steric hindrance of PIB-Ln-TTA and better fluorescent behavior because of the coordinated water molecules being expelled and energy transfer effectively from tris(2-thenoyltrifluoroacetonato) to Eu3+. On the basis of the superior performance, PIB-Eu-TTA demonstrates an exemplary application in a flexible and self-healable conductor and light-emitting diode (LED), thereby providing new insight into the future development of e-skin and smart optical devices.