Three new terpyridine appended pyrene derivatives (Pyr-Tp, Pyr-Ph-Tp, and Pyr-Bp-Tp) have been synthesized by condensation and Suzuki-Miyaura reaction. The photo-physical, electro-chemical and thermal properties of these compounds have been investigated in detail. DFT studies have been carried out to understand the structure-property relationships at the molecular level. Synthesized fluorophores displayed high quantum yield (70-96%) of fluorescence due to triplet to singlet intramolecular energy transfer, delayed fluorescence and positive solvatochromism indicating the presence of intra-molecular charge transfer excited state. In addition, they have high thermal decomposition temperature (T_d: 390-450°C), melting temperature (T_m: 180-220°C) and further with suitable oxidation and reduction potentials makes them favourable molecules for OLED fabrications.

中文翻译：

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附加的吡啶吡啶衍生物作为OLED的电化学发光材料：光物理，热和电化学性质的表征

通过缩合和Suzuki-Miyaura反应合成了三种新的附有吡啶的pyr衍生物（Pyr-Tp，Pyr-Ph-Tp和Pyr-Bp-Tp）。已对这些化合物的光物理，电化学和热性质进行了详细研究。已经进行了DFT研究以了解分子水平上的结构-性质关系。合成的荧光团由于三重态到单重态分子内能量转移，延迟的荧光和正溶剂溶变色而显示出高的量子产率（70-96％），表明存在分子内电荷转移激发态。此外，它们的热分解温度（T _d：390-450°C）和熔化温度（T_m：180-220℃）以及进一步合适的氧化和还原电势使它们成为用于OLED制造的有利分子。