Deep-violet lasing at the microscale is crucial for the realization of highly integrated nano-photonic and communication devices. In the work reported herein, we fabricated a type of deep-violet organic microwire laser by suppressing the intermolecular π–π stacking interaction and aggregation based on a hydrogen-bonded-assisted molecular encapsulation mechanism. Interestingly, a regular supramolecular encapsulation layer can be constructed by controlling SO⋯H–C hydrogen-bonded superstructures in crystalline frameworks and simultaneously effectively inhibiting the intermolecular π–π stacking interactions, allowing for single-molecular excitonic behavior. For the synergistic effects of shorter effective conjugated-length and negligible intermolecular excitonic coupling, the microwire therein can act as a high-quality whispering-gallery-mode microcavity for low threshold deep-violet lasing (41 W cm⁻², 6 tims lower than those of controlled materials) with an emission peak of 405 ± 2 nm, attributed to 0–1 band emission of a single molecule in diluted solution. Therefore, our work provides a proof-of-concept trial for developing a highly stable and easily processed single crystal via a molecular encapsulation strategy in a supramolecular crystalline framework.

中文翻译：

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用于纯紫激光的氢键辅助超分子微丝：防止单晶中π-π分子间堆积和聚集的好处†

微米级的深紫激光对于实现高度集成的纳米光子和通信设备至关重要。在本文报道的工作中，我们基于氢键辅助的分子包封机制，通过抑制分子间π-π堆积相互作用和聚集来制造了一种深紫色有机微线激光器。有趣的是，可以通过控制S来构造规则的超分子包封层O⋯H–C在晶体框架中氢键结合的上层结构，同时有效地抑制了分子​​间π–π堆积相互作用，从而实现了单分子激子行为。对于较短的有效共轭长度和可忽略的分子间激子耦合，其协同作用，其中的微丝可以充当高质量的耳语-画廊模式微腔，以实现低阈值的深紫激光（41 W cm ^-2，比低6 tims）那些受控物质）的发射峰为405±2 nm，这归因于稀释溶液中单个分子的0-1带发射。因此，我们的工作提供了一种概念验证试验，可以通过以下方式开发高度稳定且易于加工的单晶 超分子晶体框架中的分子包封策略。