Restriction of intramolecular motion (RIM) is the widely-accpeted mechanism of aggregation-induced emission (AIE). In this concise and comprehensive perspective, four mechanistic models related to different nonradiative pathways are summarized with examples to disclose the connotation of RIM, and meaningful mechanistic topics for future researches are advised.

中文翻译：

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限制分子内运动 (RIM) 的机械内涵

分子内运动 (RIM) 的限制是广泛接受的聚集诱导发射 (AIE) 机制。在这个简洁而全面的视角下，通过实例总结了与不同非辐射途径相关的四种机械模型，以揭示 RIM 的内涵，并为未来研究提供有意义的机械主题。