A polyaromatic tube with a subnanometer‐sized cavity was efficiently prepared on a gram‐scale through the stereo‐controlled cyclotrimerization of a diphenylanthracene derivative as a key step. The facile exterior alkylation of the polyaromatic framework leads to a moderately fluorescent tube (R=‐OC₁₀H₂₁; Φ_F=20 %) in the solid state. The emission intensity of the solid‐state alkyl‐substituted tube is remarkably enhanced upon heating (up to 1.6 times, Φ_F=31 %) as well as doping with fluorescent dyes (up to 4.2 times, Φ_F=83 %) through efficient energy transfer.

中文翻译：

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固态芳烃管的烷基化，加热和掺杂诱导的发射增强

作为关键步骤，通过对二苯蒽衍生物进行立体控制的环三聚反应，以克为单位有效地制备了具有亚纳米级腔的聚芳烃管。聚芳族框架引线的外部容易烷基化以适度荧光管（R = -OC ₁₀ ħ ₂₁ ; Φ _˚F = 20％）在固态下。固态烷基取代的管的发光强度在加热时显着地提高（高达1.6倍，Φ _˚F = 31％），以及用荧光染料掺杂（高达4.2倍，Φ _˚F = 83％）通过高效能量转移。