Fluorescence Quenching of 4,4′-Dimethoxytriphenylamine-Substituted Diketopyrrolopyrrole via Intramolecular Photoinduced Electron Transfer,The Journal of Physical Chemistry C

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Fluorescence Quenching of 4,4′-Dimethoxytriphenylamine-Substituted Diketopyrrolopyrrole via Intramolecular Photoinduced Electron Transfer
The Journal of Physical Chemistry C ( IF 3.3 ) Pub Date : 2019-09-24 , DOI: 10.1021/acs.jpcc.9b07275
Tae Gyu Hwang ₁ , Gi Rim Han ₂ , Jae Moon Lee ₁ , Jong Woo Lee ₂ , Hong Mo Kim ₁ , Doyk Hwang ₂ , Seong Keun Kim ₂ , Jae Pil Kim ₁

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Herein, we report significant fluorescence quenching induced by intramolecular photoinduced electron transfer (PET) in electron donor–acceptor-type π-conjugated organic molecules with methoxy-containing donor moieties. The fluorescence quenching of the diketopyrrolopyrrole (DPP, a well-known highly emissive luminophore) derivatives seemed to be affected by the methoxy moieties. Steady-state optical properties of the synthesized materials were analyzed in the solution, aggregate (N-methyl-2-pyrrolidone/H₂O), and solid states in order to understand the influence of the surrounding environment. The mechanistic aspect of the intramolecular PET process in methoxy-containing DPP derivatives was revealed by singlet oxygen generation measurements and ultrafast femtosecond transient absorption spectroscopy. These results could provide crucial insights toward designing emissive π-conjugated organic molecules.

中文翻译：

分子内光诱导电子转移对4,4'-二甲氧基三苯胺取代的二酮吡咯并吡咯的荧光猝灭

在本文中，我们报道了分子内光诱导电子转移（PET）在具有含甲氧基的供体基团的电子供体-受体型π-共轭有机分子中引起的显着荧光猝灭。二酮基吡咯并吡咯（DPP，一种众所周知的高发射发光体）衍生物的荧光猝灭似乎受到甲氧基部分的影响。在溶液中分析了合成材料的稳态光学性质，聚集体（N-甲基-2-吡咯烷酮/ H ₂O）和固态，以便了解周围环境的影响。通过单重态氧生成测量和超快速飞秒瞬态吸收光谱法揭示了含甲氧基的DPP衍生物中分子内PET过程的机理。这些结果可以为设计发射π-共轭有机分子提供重要的见识。

更新日期：2019-09-25

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