The interplay of mechanical grinding and aniline vapor fuming on the fluorescence of the pentiptycene‐anthracene‐pentiptycene π‐conjugated molecules PAP‐Cn, where n is 4, 8, 12, or 16 and refers to the number of carbon atom in the terminal alkyl chains, in solid films are reported. The differences and similarities among the four homologs have led to a conclusion of the formation of an emissive triplex state for the ground and fumed films. Thermogravimetric analysis reveals the guest‐host molar ratio and the retention ability of the aniline on the various types of films. A stepwise protocol of fuming‐grinding‐annealing is developed for fluorimetric differential sensing of eight substituted aniline vapors with a single probe of PAP‐C8. The role of the bulky pentiptycene groups in the observed fluorescence properties is also discussed.

中文翻译：

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庞大π系统的机械变色和气相变色荧光：烷基链长效应，三重态发射和对苯胺蒸气的差分传感

机械研磨和苯胺蒸气发烟对戊烯-蒽-戊烯-烯π共轭分子PAP-C n的荧光的相互作用，其中n是在固体膜中报道的4、8、12或16，是指末端烷基链中的碳原子数。四个同系物之间的差异和相似性已得出结论，即地面薄膜和气相薄膜形成了发射三重态。热重分析揭示了客体与主体之间的摩尔比以及苯胺在各种类型薄膜上的保留能力。开发了一个分步的烟熏研磨退火方案，用一个PAP-C8探针对八种取代的苯胺蒸气进行荧光差分检测。还讨论了庞大的戊烯并茂基团在观察到的荧光性质中的作用。