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首页> 外文期刊>Optical Materials >The modification in the photo-physical properties via transformation of synthetic dihydrated Znq_2 to anhydrous (Znq_2)4 tetramer by sublimation process
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The modification in the photo-physical properties via transformation of synthetic dihydrated Znq_2 to anhydrous (Znq_2)4 tetramer by sublimation process

机译：通过升华法将合成的二水合Znq_2转化为无水（Znq_2）4四聚体来改善光物理性质

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摘要

A prominent green emitting anhydrous (Znq(2))(4) tetramer phosphor has been produced by the sublimation in Ar-atmosphere from dihydrated Znq(2). The dihydrated Znq 2 was synthesized by the co-precipitation method under normal atmospheric condition. Structural changes which are responsible for change in their photo-physical properties have been confirmed by the XRD, FTIR, NMR analysis and relative stability by the TGA/DTA analysis. The dependence of UV-visible absorption spectrum, in different acidic and basic mediums at different concentrations on the alteration of phase from dihydrated Znq(2) to anhydrous (Znq(2))(4) tetramer leading to the change in the band gap, has been noted. A photoluminescence spectrum of solid and of solution state and structural dependence on emission and excitation wavelength, revealing the modification in the structure, is responsible for a prominent green emission. Solvato-chromatic effect on PL emission leading to blue shift by the addition of acidic solvents and a red shift by basic solvents has also been reported. The structural formation and experimental band gap energy information has been supported by the quantum chemical calculations using DFT Computational study. We conclude from the study that the produced anhydrous (Znq(2))(4) tetramer phosphor has a potential application as a prominent green dopant in OLEDs including indoor lighting. Additionally, this study gives an insight into the spectroscopy of Zinc (II) quinolate complex.
机译：通过在Ar气氛中从二水合Znq（2）升华，产生了一种显着的绿色发射无水（Znq（2））（4）四聚体荧光粉。在正常大气条件下，通过共沉淀法合成了二水合的Znq 2。 XRD，FTIR，NMR分析和TGA / DTA分析的相对稳定性已经证实了负责其光物理性质变化的结构变化。在不同浓度的不同酸性和碱性介质中，UV-可见吸收光谱对二水合Znq（2）到无水（Znq（2））（4）四聚体的相变的依赖性，导致带隙的变化，已经注意到。固态和溶液态的光致发光光谱以及结构对发射和激发波长的依赖性，揭示了结构的变化，是引起绿色发射的原因。还已经报道了溶剂色对PL发射的影响，通过加入酸性溶剂导致蓝移，而碱性溶剂导致红移。使用DFT计算研究的量子化学计算已支持了结构形成和实验带隙能信息。我们从研究中得出结论，所产生的无水（Znq（2））（4）四聚体荧光粉作为潜在的绿色掺杂剂在包括室内照明的OLED中具有潜在的应用。此外，这项研究还提供了对喹诺酮酸锌（II）配合物光谱的深入了解。

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