 |
 |
 |
 |
 |
 |
||
 |
 |
 |
 |
 |
| 2 | 1/1 | 返回列表 |
| 查看: 426 | 回復(fù): 1 | |||
| 本帖產(chǎn)生 1 個 翻譯EPI ，點(diǎn)擊這里進(jìn)行查看 | |||
yhc0316銀蟲 (初入文壇)
|
[求助]
求幫忙翻譯，謝謝��！
|
||
|
Absorption and emission spectra of pristine FLA-Cn solids The fluorescence colors of pristine FLA-Cn solids are gradually blue-shifted with the increase of alkyl length, and FLA-C3 and FLA-C12 exhibit yellow (558 nm) and green (515 nm) emission, respectively (Fig. 2a, Table 1). On considering that the only difference between these molecules is the alkyl length, it is concluded that the alkyl chain can affect the solid-stateaggregation behavior of FLA-Cn. It should be noticed that there have been a variety of reports on the effect of length of alkyl chains on the solid-state aggregation and fluorescence properties of organic fluorophores,10i,13,15b,16 however, the reports on the effect of length of alkyl chains on the PFC behaviour are scarce. The chain length-dependent fluorescence properties are believed to be relative to both crystal packing modes (J- or Haggregation) and the distortion degree of the conjugated backbone. To understand the different uorescence emissions of homologous and isomeric uorophores in crystalline states, an effective and accurate way is to prepare and analyze the single crystal structures. Unfortunately, good-quality single crystals of FLA-Cn could not be obtained probably due to the existence of four side alkyl chains in the twisted backbone, which is unfavorable for the highly ordered alignment of molecules and the formation of high-quality single crystals. Recently, Chi et al. have reported that, in the crystalline state, 9,10-bis(p-alkoxystyryl) anthracenes (9,10-DSA) with long alkyl chains (decyl, undecyl and dodecyl) have more twisted conjugated backbones and weaker intermolecular interactions than those with short alkyl chains (heptyl, octyl and nonyl),10i which is believed to be the reason why long alkyl-containing 9,10-DSA derivatives emit shorter PL wavelengths and exhibit larger PFC spectral shifts ΔλPFC |
回復(fù)此樓» 猜你喜歡
本人考085602 化學(xué)工程 專碩
已經(jīng)有23人回復(fù)
-
求調(diào)劑院校信息
已經(jīng)有4人回復(fù)
-
085600材料與化工306
已經(jīng)有4人回復(fù)
-
286求調(diào)劑
已經(jīng)有10人回復(fù)
-
328求調(diào)劑，英語六級551，有科研經(jīng)歷
已經(jīng)有9人回復(fù)
-
一志愿北京化工大學(xué)070300 學(xué)碩336求調(diào)劑
已經(jīng)有4人回復(fù)
-
286分人工智能專業(yè)請求調(diào)劑愿意跨考！
已經(jīng)有8人回復(fù)
-
資源與環(huán)境 調(diào)劑申請(333分)
已經(jīng)有5人回復(fù)
-
280求調(diào)劑
已經(jīng)有12人回復(fù)
-
269專碩求調(diào)劑
已經(jīng)有5人回復(fù)
ssssllllnnnn 
至尊木蟲 (知名作家)
Translator and Proofreader
- 翻譯EPI: 1690
- 應(yīng)助: 452 (碩士)
- 金幣: 31580.9
- 紅花: 100
- 帖子: 7681
- 在線: 19966.6小時
- 蟲號: 3328089
- 注冊: 2014-07-17
- 專業(yè): 腫瘤發(fā)生
【答案】應(yīng)助回帖
★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ...
yhc0316: 金幣+70, 翻譯EPI+1 2014-10-20 13:55:34
yhc0316: 金幣+70, 翻譯EPI+1 2014-10-20 13:55:34
|
原始FLA-Cn固體的吸收和發(fā)射光譜 與烷基長度的增加，原始FLA-Cn固體的熒光顏色逐漸藍(lán)移，F(xiàn)LA-C3和FLA-C12分別具有黃色（558納米）和綠色（515納米）發(fā)光（圖2a，表1）�？紤]到這些分子之間的唯一差別是其烷基長度，可以得出結(jié)論，該烷基鏈可影響FLA-Cn的固態(tài)聚合行為。但應(yīng)當(dāng)注意到，關(guān)于烷基鏈長度對有機(jī)熒光團(tuán)的固態(tài)聚合和熒光性能的影響已經(jīng)有了相當(dāng)多的報道【10i，13,15b，16】。但有關(guān)烷基鏈長度對PFC性能影響的影響卻很少見。鏈長依賴性熒光性能對兩種晶體堆積模式（J-或H-聚合）和共軛主鏈的扭曲程度是被認(rèn)為是相對的。 為了解在結(jié)晶狀態(tài)下，同源和同分異構(gòu)體的熒光團(tuán)的不同熒光發(fā)光，一種有效而準(zhǔn)確的方法是制備和分析單晶結(jié)構(gòu)。不幸的是，無法得到高質(zhì)量的單晶FLA-Cn，可能是由于在扭曲主鏈上存在四個側(cè)烷基鏈，這不利于分子的高度有序取向和高品質(zhì)的單晶形成。最近Chi等人報道稱，在結(jié)晶狀態(tài)下，9,10 - 二（對 - 烷氧基苯乙烯基）蒽（9,10-DSA）具有長鏈烷基（癸基，十一烷基和十二烷基），與含短烷基鏈（庚基，辛基和壬基）相比，有更多扭曲的共軛主鏈和較弱的分子間相互作用【10I】，這被認(rèn)為是含長鏈烷基-9,10-DSA衍生物發(fā)短PL波長，并具有更大PFC光譜移位ΔλPFC的原因 |
2樓2014-10-20 12:27:17
相關(guān)版塊跳轉(zhuǎn)
我要訂閱樓主 yhc0316 的主題更新
| 2 | 1/1 | 返回列表 |
| 最具人氣熱帖推薦 [查看全部] | 作者 | 回/看 | 最后發(fā)表 | |
|---|---|---|---|---|
|
[考研] 328求調(diào)劑，英語六級551，有科研經(jīng)歷 +5 | 生物工程調(diào)劑 2026-03-17 | 9/450 |
|
|---|---|---|---|---|
|
[考研] 280求調(diào)劑 +11 | 咕嚕曉曉 2026-03-18 | 12/600 |
|
|
|
[考研] 材料求調(diào)劑 +5 | @taotao 2026-03-21 | 5/250 |
|
|
|
[考研] 0703化學(xué)調(diào)劑 ，六級已過，有科研經(jīng)歷 +14 | 曦熙兮 2026-03-15 | 14/700 |
|
|
|
[考研] 311求調(diào)劑 +3 | 勇敢的小吳 2026-03-20 | 3/150 |
|
|
|
[考研] 307求調(diào)劑 +3 | 余意卿 2026-03-18 | 3/150 |
|
|
|
[考研] 310求調(diào)劑 +3 | baibai1314 2026-03-16 | 3/150 |
|
|
|
[考研] 機(jī)械專碩299求調(diào)劑至材料 +3 | kkcoco25 2026-03-16 | 4/200 |
|
|
|
[考研] 070300化學(xué)319求調(diào)劑 +7 | 錦鯉0909 2026-03-17 | 7/350 |
|
|
|
[考研] 307求調(diào)劑 +3 | wyyyqx 2026-03-17 | 3/150 |
|
|
|
[考研] 299求調(diào)劑 +6 | △小透明* 2026-03-17 | 6/300 |
|
|
|
[考研] 考研調(diào)劑求學(xué)校推薦 +3 | 伯樂29 2026-03-18 | 5/250 |
|
|
|
[考研] 一志愿西安交通大學(xué) 學(xué)碩 354求調(diào)劑211或者雙一流 +3 | 我想要讀研究生 2026-03-20 | 3/150 |
|
|
|
[考研] 一志愿985，本科211，0817化學(xué)工程與技術(shù)319求調(diào)劑 +10 | Liwangman 2026-03-15 | 10/500 |
|
|
|
[考研] 材料工程專碩調(diào)劑 +5 | 204818@lcx 2026-03-17 | 6/300 |
|
|
|
[考研] 293求調(diào)劑 +11 | zjl的號 2026-03-16 | 16/800 |
|
|
|
[考研] 一志愿蘇州大學(xué)材料工程（085601）專碩有科研經(jīng)歷三項國獎兩個實用型專利一項省級立項 +6 | 大火山小火山 2026-03-16 | 8/400 |
|
|
|
[考博] 26申博 +4 | 八6八68 2026-03-16 | 4/200 |
|
|
|
[考研] 275求調(diào)劑 +4 | 太陽花天天開心 2026-03-16 | 4/200 |
|
|
|
[考研] 0856求調(diào)劑 +3 | 劉夢微 2026-03-15 | 3/150 |
|