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yhc0316銀蟲 (初入文壇)
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[求助]
求幫忙翻譯,謝謝!!
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Solid-state fluorescence properties and reversible piezochromic luminescence of aggregation-induced emission-active 9,10-bis[(9,9-dialkylfluorene-2-yl)vinyl] anthracenes In this work, we have synthesized 9,10-bis[(9,9-dialkylfluorene-2-yl)vinyl]anthracene derivatives (FLA-Cn) with propyl, pentyl, and dodecyl side chains to investigate their fluorescence properties. The results show that FLA-Cn exhibit not only an aggregation-induced emission effect but also reversible piezofluorochromic (PFC) behaviour. Interestingly, the fluorescence emission and grinding-induced spectral shifts Δλ(PFC) of FLA-Cn solids are alkyl length-dependent: the longer alkyl-containing FLA-Cn solids show more blue-shifted emission and larger DlPFC. Moreover, the fluorescence emission of ground FLA-C12 solid can recover spontaneously at room temperature, Powder wide-angle X-ray diffraction and differential scanning calorimetry experiments reveal that the transformation between crystalline and amorphous states under various external stimuli is responsible for the PFC behaviour, and the spontaneous recovering emission of amorphized FLA-C12 solid is ascribed to its low cold-crystallization temperature. This work demonstrates once again the accessibility of tuning the solid-state optical properties of organic fluorophores by combining the simple alternation of molecular chemical structure and the physical change of aggregate morphology under external stimuli. |
至尊木蟲 (知名作家)
Translator and Proofreader
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聚集誘導(dǎo)發(fā)光活性9,10 - 雙[(9,9 - 二烷基-2 - 基)乙烯基]蒽的固態(tài)熒光性能和可逆壓致變色發(fā)光 在本工作中,我們已經(jīng)用異丙基,戊基,和十二烷基側(cè)鏈合成了9,10 - 雙[(9,9 - 二烷基-2 - 基)乙烯基]蒽衍生物(FLA-Cn),并研究它們的熒光性質(zhì)。結(jié)果表明,F(xiàn)LA-Cn不僅具有聚集誘導(dǎo)發(fā)光的作用,而且具有可逆壓氟致變色(PFC)性能。有趣的是,固態(tài)FLA-Cn的熒光發(fā)光和研磨引起的光譜位移Δλ是烷基長度依賴性的:FLA-Cn所含烷基越長,發(fā)光藍(lán)移約多,DIPFC也越大。此外,研磨FLA-C12固態(tài)的熒光發(fā)光在室溫下能自行恢復(fù),粉末廣角X射線衍射和差示掃描量熱法的實(shí)驗(yàn)表明,在各種外界刺激下,晶態(tài)和非晶態(tài)之間的轉(zhuǎn)變決定了PFC性能,而非晶化FLA-C12固體的自發(fā)恢復(fù)發(fā)光則歸因于它的低冷結(jié)晶溫度。這項(xiàng)工作再次證明,在外部刺激下,把分子化學(xué)結(jié)構(gòu)的簡單改變和聚集形態(tài)下的物理變化結(jié)合起來就可以調(diào)整有機(jī)熒光固態(tài)光學(xué)性能。 |
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