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yhc0316銀蟲 (初入文壇)
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Very recently, it was reported that 9,10-bis(p-alkoxystyryl) anthracences only with sufficient long alkyl chains (decyl, undecyl and dodecyl) are effective PFC materials;10i in contrast, the shorter alkyl-containing 9,10-bis[(N-alkylcarbazol-3-yl)vinyl] anthracenes show more remarkable PFC behaviour.13 These two forms of chain length-dependent PFC behaviour underline not only the complexity of the structure–property relationship of PFC materials but also the signicant effect of the nature ofend-arylenes and substituents at the aryl rings on the solidstate fluorescence and piezochromic luminescence of 9,10- bis(arylvinyl)anthracene derivatives. To further understand this phenomenon and develop new PFC materials, in the current work, we have designed and synthesized some AIE-active 9,10- bis[(9,9-dialkyluorene-2-yl)vinyl]anthracenes with propyl, pentyl and dodecyl as side alkyl chains (FLA-Cn, Scheme 1) to investigate their fluorescence properties. We report here that FLA-Cn not only exhibit chain length-dependent PFC behaviour, in that longer alkyl-containing FLA-Cn show larger spectral shifts, but also the fluorescence color and emission of ground FLA-C12 solid can recover spontaneously at room temperature. |
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至尊木蟲 (知名作家)
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- 翻譯EPI: 1690
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yhc0316: 金幣+50, 翻譯EPI+1 2014-10-19 14:11:38
yhc0316: 金幣+50, 翻譯EPI+1 2014-10-19 14:11:38
| 最近，據(jù)報道，9,10 - 雙（對 - 烷氧基苯乙烯基）蒽只有具有足夠長的烷基鏈（癸基，十一烷基和十二烷基）時才是有效的PFC材料【10】與此相對，9,10-雙[（N-烷基咔唑-3 - 基）乙烯基]蒽含有更短的烷基鏈時具有更卓越的PFC性能【13】。這兩種形式的鏈長依賴性的PFC性能不僅說明了PFC材料的結(jié)構(gòu) - 性能關(guān)系的復雜性，而且末端亞芳基和芳環(huán)上的取代基的性質(zhì)對9,10-二（芳基乙烯基）蒽衍生物固態(tài)熒光和壓致變色發(fā)光的顯著影響。為了進一步理解這種現(xiàn)象，并開發(fā)新的PFC材料，在本工作中我們設(shè)計并合成了一些AIE活性9,10-雙[（9,9 - 二烷基芴-2 - 基）乙烯基]蒽和丙基，戊基和十二烷基作為側(cè)烷基鏈（FLA-Cn，方案1），以研究它們的熒光性質(zhì)。我們在本文報告，F(xiàn)LA-Cn不僅具有鏈長度依賴性PFC性能，因為FLA-Cn中烷基鏈越長，光譜移位越大，而且熒光色和研磨FLA-C12的固態(tài)發(fā)光可在室溫下自發(fā)地恢復。 |
2樓2014-10-19 09:16:53
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