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Shifting the emission of proton transfer fluorescence with fluorine-boron as the rotation lock
Molecular Crystals and Liquid Crystals ( IF 0.7 ) Pub Date : 2020-06-12 , DOI: 10.1080/15421406.2020.1741800
Weifeng He 1 , Xiaochuan Li 2 , Hyorim Kim 3 , Young-A. Son 3
Affiliation  

Abstract A fluorine-boron (F-B) containing dye was configured and routinely characterized by nuclear magnetic resonance (NMR) and mass spectrometry (MS) technology. The absorption and emission behavior were investigated in selected solvent with different polarity. Both in chloroform and in solid powder state, it is highly emissive. The absolute fluorescence quantum yield was determined to be 0.60. The coordination lock of B atom prevents the free rotation of two fragment of the dye and limited the nonradiation transition, thus leading to the fluorescence emission character. In addition, significant Stoke’s shift (∼190 nm) was observed. Similar emission maximum in solution and solid shows that the emission behavior is insensitive to molecular aggregation behavior. In all the case, the emission colors were demonstrated by Commission internationale de l’éclairage (CIE) chromaticity system.

中文翻译:

以氟-硼为旋转锁转移质子转移荧光的发射

摘要 采用核磁共振 (NMR) 和质谱 (MS) 技术配置并常规表征了一种含氟硼 (FB) 染料。在不同极性的选定溶剂中研究了吸收和发射行为。在氯仿和固体粉末状态下,它都是高发射性的。绝对荧光量子产率被确定为0.60。B原子的配位锁阻止了染料的两个片段的自由旋转并限制了非辐射跃迁,从而导致了荧光发射特性。此外,还观察到明显的斯托克位移 (~190 nm)。溶液和固体中类似的发射最大值表明发射行为对分子聚集行为不敏感。在所有情况下,
更新日期:2020-06-12
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