Multifunctional stimuli‐responsive materials have attracted tremendous attention because of their great potential in a variety of applications. However, conventional stimuli‐responsive emitting materials are limited to single‐stimulus response with rare attention paid to triplet excitons controlling. Herein, a multi‐stimuli‐responsive molecule (SPh‐TP) with tuning of triplet excitons is reported. During illumination, the SPh‐TP crystals with unique twisted structure and loose packing have a high probability to contact with neighboring oxygen atoms, followed by the occurrence of triplet–triplet energy transfer, and thus showing a photosensitive property. Meanwhile, the photosensitive property is also observed for the crystalline sample in vacuum, which is associated with oxygens locked in crystal pores. Upon mechanical stress, the crystalline morphology is broken and the molecules become more planar with tighter stacking, revealing its mechanochromism. In comparison to the crystalline sample, the ground sample can respond to light with different rates depending on the ratio of oxygen. This multi‐stimuli‐responsive material shows potential applications in oxygen detection and double‐encryption of information.

中文翻译：

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通过灵活调整三重态激子对光，氧和机械应力的响应的多刺激响应分子

多功能刺激响应材料因其在各种应用中的巨大潜力而​​备受关注。但是，传统的刺激响应发射材料仅限于单刺激响应，很少关注三重态激子的控制。在本文中，报道了具有三重态激子调节的多刺激响应分子（SPh-TP）。在照明过程中，具有独特的扭曲结构和疏松堆积的SPh-TP晶体极有可能与相邻的氧原子接触，随后发生三重态-三重态能量转移，从而显示出光敏性。同时，在真空中还观察到晶体样品的光敏性质，这与锁定在晶体孔中的氧有关。在机械应力下 晶体形态被破坏，分子变得更加平坦，堆积更加紧密，从而揭示了其机械变色现象。与晶体样品相比，研磨后的样品可以根据氧气的比例以不同的速率响应光。这种多刺激反应性材料显示了在氧检测和信息双重加密中的潜在应用。