Design and engineering of highly efficient emitting materials with assembly-induced luminescence, such as room-temperature phosphorescence (RTP) and aggregation-induced emission (AIE), have stimulated extensive efforts. Here, we propose a new strategy to obtain size-controlled Eu3+-complex nanoparticles (Eu-NPs) with self-assembly-induced luminescence (SAIL) characteristics without encapsulation or hybridization. Compared with previous RTP or AIE materials, the SAIL phenomena of increased luminescence intensity and lifetime in aqueous solution for the proposed Eu-NPs are due to the combined effect of self-assembly in confining the molecular motion and shielding the water quenching. As proof of concept, we also show that this system can be further applied in bioimaging, temperature measurement and HClO sensing. The SAIL activity of the rare-earth (RE) system proposed here offers a further step forward on the roadmap for the development of RE light conversion systems and their integration in bioimaging and therapy applications.

中文翻译：

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Eu3+复合物的自组装诱导发光及其在生物成像中的应用


具有组装诱导发光的高效发光材料的设计和工程，例如室温磷光（RTP）和聚集诱导发光（AIE），已经激发了广泛的努力。在这里，我们提出了一种新策略，无需封装或杂交即可获得具有自组装诱导发光（SAIL）特性的尺寸控制的Eu3+复合纳米粒子（Eu-NP）。与之前的RTP或AIE材料相比，所提出的Eu-NPs在水溶液中发光强度和寿命增加的SAIL现象是由于自组装限制分子运动和屏蔽水猝灭的综合作用。作为概念证明，我们还表明该系统可以进一步应用于生物成像、温度测量和 HClO 传感。这里提出的稀土 (RE) 系统的 SAIL 活动为稀土光转换系统的开发及其在生物成像和治疗应用中的集成的路线图又向前迈出了一步。