Abstract Silacyclopentadienes (siloles) are currently of great interest because of their intriguing aggregation-induced emission (AIE) characteristics. In this work, abnormally AIE phenomena were observed from silyl- and hydrogen-substituted siloles respectively. We propose silyl-substituent and hydrogen atom effects to explain this via both experiments and theoretical calculations. It was discovered that trimethylsilyl substituents destroyed the p-interactions with the silole core and resulted in the non-fluorescence. Additionally, 1-chloro-1-H-2,3,4,5-tetraphenylsilole featuring strong fluorescences in both solid and solution states with high fluorescence quantum yields represents a new potential photoelectric material. This work not only reports the silole with strong fluorescences in both solid and solution states for the first time but also contributs to enrich the AIE research of siloles. Graphical Abstract

中文翻译：

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从氢和甲硅烷基取代的硅酮观察到的异常聚集诱导排放

摘要 硅杂环戊二烯（siloles）由于其有趣的聚集诱导发射（AIE）特性，目前引起了人们极大的兴趣。在这项工作中，分别从甲硅烷基和氢取代的硅酮中观察到异常的 AIE 现象。我们提出甲硅烷基取代基和氢原子效应来通过实验和理论计算来解释这一点。发现三甲基甲硅烷基取代基破坏了与silole核的p-相互作用并导致非荧光。此外，1-chloro-1-H-2,3,4,5-tetraphenylsilole 在固态和溶液状态下均具有强荧光，具有高荧光量子产率，是一种新的潜在光电材料。这项工作不仅首次报道了在固体和溶液状态下都具有强荧光的silole，而且有助于丰富silole的AIE研究。图形概要