Fluorescent sensors with advantages of excellent sensitivity, rapid response, and easy operation are emerging as powerful tools in environmental monitoring, biological research, and disease diagnosis. However, conventional fluorophores featured with π-planar structures usually suffer from serious self-quenching in the aggregated state, poor photostability, and small Stokes’ shift. In contrast to conventional aggregation-caused quenching (ACQ) fluorophores, the newly emerged aggregation-induced emission fluorogens (AIEgens) are featured with high emission efficiency in the aggregated state, which provide unique opportunities for various sensing applications with advantages of high signal-to-noise ratio, strong photostability, and large Stokes’ shift. In this review, we will first briefly give an introduction of the AIE concept and the turn-on sensing principles. Then, we will discuss the recent examples of AIE sensors according to types of analytes. Finally, we will give a perspective on the future developments of AIE sensors. We hope this review will inspire more endeavors to devote to this emerging world.

中文翻译：

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基于聚集诱导发射的荧光传感器：最新进展和展望

具有出色的灵敏度，快速响应和易于操作等优点的荧光传感器正在成为环境监测，生物学研究和疾病诊断中的强大工具。然而，具有π-平面结构特征的常规荧光团通常在聚集状态下遭受严重的自猝灭，光稳定性差和斯托克斯位移小。与传统的聚集引起的猝灭（ACQ）荧光团相反，新出现的聚集诱导的发射荧光素（AIEgens）在聚集状态下具有高发射效率，这为具有高信噪比优势的各种传感应用提供了独特的机会-噪声比大，光稳定性强，斯托克斯位移大。在这篇评论中，我们将首先简要介绍AIE概念和开启感应原理。然后，我们将根据分析物的类型讨论AIE传感器的最新示例。最后，我们将对AIE传感器的未来发展进行展望。我们希望这次审查会激发更多致力于这个新兴世界的努力。