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[求助]
英语论文翻译，材料类
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| A triphenylamine-based organic luminophor (TPA-CO) with a highly distorted structure has been designed and effortlessly obtained by an Ullmann reaction. The luminophor exhibits a stimuli-induced emission enhancement effect and intramolecular charge transfer properties. The fluorescence efficiency of its crystals is dramatically increased from 0.4% to 12.3% upon grinding. The emission enhancement is also realized by a heating process. The “bright” state can recover its original state and turn “dark”. The luminescence “on–off” behaviour is repeatedly transformed by a grinding–vapour process or by a heating process. The XRD patterns of the “bright” and “dark” states show that the change of emission intensity is related to the reversible transition between the crystalline state and the metastable amorphous state. At the molecular level, the emission enhancement upon external stimuli may be attributed to conformational planarization and weak intermolecular interactions. |
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【答案】应助回帖
★ ★ ★ ★ ★ ★ ★
真强必胜: 金币+2 2014-10-17 13:26:56
团子小姐: 金币+5, 翻译EPI+1, ★★★★★最佳答案, 谢谢 2014-10-18 09:19:49
真强必胜: 金币+2 2014-10-17 13:26:56
团子小姐: 金币+5, 翻译EPI+1, ★★★★★最佳答案, 谢谢 2014-10-18 09:19:49
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已有人设计出结构高度扭曲的三苯胺基有机发光体（TPA-CO），并通过厄尔曼偶联反应较简便地制取了该材料。该发光体具有刺激诱导发光增强效应（即受环境条件等的诱导时，发光性增强），及电荷在分子内可转移的性质。 经研磨后，该晶体的荧光发生率可由0.4%大幅提高至12.3%。而经热处理后，该晶体的发光强度也出现增强。其“发光”状态可恢复至初始的“无光”状态。该发光体的这种“开-关”特性间的相互转换可通过摩擦致热或热处理过程来进行控制。对该发光体处于“发光”及“不发光”状态下的XRD测试表明，其发光强度与材料的晶态及亚稳非晶态间的可逆转变有关。从分子水平上进行分析，其在外界作用下发光增强可以解释为构象的平面化和分子间的弱相互作用。  |
3楼2014-10-17 12:37:28