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团子小姐

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The desired luminophor TPA-CO was prepared conveniently by an Ullmann reaction with yields over 74%. As depicted in Fig. S1,† as the solvent polarity increased from nonpolar toluene to highly polar acetonitrile, the emission peaks strongly depend on the solvent polarity, revealing an evident bathochromic effect. The fluorescence intensity was also obviously reduced in highly polar media. Additionally, Fig. S2† shows that electron clouds of the highest occupied molecular orbital
(HOMO) levels were mainly concentrated on the electrondonating arylamine units; however, those of lowest unoccupied molecular orbital (LUMO) levels were mostly spread to the electron-accepting benzophenone. These results showed that luminophor TPA-CO was a D–p–A dipole molecule with obvious intramolecular charge transfer (ICT) properties.
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团子小姐: 金币+8, 翻译EPI+1, ★★★★★最佳答案, 谢谢 2014-10-13 12:01:20
所需的发光体TPA-CO由Ullmann反应方便制得,产率超过74%。如图S1†,所示,随着溶剂极性升高,由非极性的甲苯上升到高极性乙腈,发射峰强烈依赖于溶剂的极性,显示一种明显的红移作用。在高极性介质中荧光强度也明显减小。此外,图S2†显示,最高被占分子轨道(HOMO)水平的电子云主要集中在供电子单元的芳基胺; 然而,那些最低未占据分子轨道(LUMO)水平大多分布于电子接受性的二苯甲酮。这些结果表明,发光体TPA-CO是一种D-P-A偶极分子,具有明显的分子内电荷转移(ICT)特性。
3楼2014-10-13 06:42:52
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稻草人的春天

木虫 (正式写手)

楼主,这是哪个方面的文章?

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2楼2014-10-12 22:27:27
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团子小姐

新虫 (初入文坛)

引用回帖:
2楼: Originally posted by 稻草人的春天 at 2014-10-12 22:27:27
楼主,这是哪个方面的文章?

发光材料
4楼2014-10-14 15:45:21
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