Green synthesis of aryl-(4-oxo-1,2-dihydroquinazolin-4-yl-methylene) pyrazole-TiO2 nanoparticles as dyes removable for waste water treatment,Applied Organometallic Chemistry

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Green synthesis of aryl-(4-oxo-1,2-dihydroquinazolin-4-yl-methylene) pyrazole-TiO2 nanoparticles as dyes removable for waste water treatment
Applied Organometallic Chemistry ( IF 3.7 ) Pub Date : 2023-11-14 , DOI: 10.1002/aoc.7307
Badriah Alotaibi ₁ , Sameh A. Rizk ₂ , Haifa A. Alyousef ₁ , Ali Atta ₃ , Abdelfattah T. Elgendy ₄

Affiliation

Facile synthesis for true intermediate (E)- and Z-2-(((5-bromo-1-(3-chloropyridin-2-yl)-1H-pyrazol-3-yl)methylene)amino)-5-chloro-3-methylbenzoic acid precursors and 2-(5-bromo-1-(3-chloropyridin-2-yl)-1H-pyrazol-3-yl)-6-chloro-3,8-dimethylquinazolin-4(3H)-one (QPP) as electron donor/electron acceptor to be working as efficient dye sensitizers. These new derivatives have a wide-band gap photo-catalysts semiconductor and are performing to spread to the visible-light region to give more stability and efficiency towards biomedicine for different diseases. In the present work, the authors are suggesting the design and synthesis of new structures of QPP molecule with extended visible light absorptivity due to the extended π-π/n-π conjugations, to stimulate TiO₂ nanoparticles in visible-light region. The physicochemical characterizations confirmed the successful synthesis of QPP, TiO₂, and QPP II/TiO₂ samples with the proposed structures. Fixing of QPP on the TiO₂ surface is refining the optical properties of TiO₂ with enhancing the charge separation and generating the efficient antenna in the visible region. Furthermore, the QPP II/TiO₂ sample achieved a threefold enhancement in the observed rate constant of the photo-degradation of rhodamine B dye when compared to the bare TiO₂. Finally, the effect of the scavengers was investigated by

O_{2}^{. -}

to be the most reactive species, and the mechanism of the enhancement was suggested for investigation of the proposed structures in various photo-catalytic and biomedical applications.

中文翻译：

绿色合成芳基-(4-氧代-1,2-二氢喹唑啉-4-基-亚甲基)吡唑-TiO2纳米粒子作为可去除染料用于废水处理

轻松合成真正的中间体 (E)- 和 Z-2-(((5-溴-1-(3-氯吡啶-2-基)-1H-吡唑-3-基)亚甲基)氨基)-5-氯- 3-甲基苯甲酸前体和2-(5-溴-1-(3-氯吡啶-2-基)-1H-吡唑-3-基)-6-氯-3,8-二甲基喹唑啉-4(3H)-酮（QPP）作为电子供体/电子受体，可作为有效的染料敏化剂。这些新衍生物具有宽带隙光催化剂半导体，并且正在扩展到可见光区域，为不同疾病的生物医学提供更多的稳定性和效率。在目前的工作中，作者建议设计和合成由于扩展的π-π/n-π共轭而具有扩展的可见光吸收率的QPP分子的新结构，以在可见光区域激发TiO 2 纳米粒子_。物理化学表征证实了具有所提出结构的QPP、TiO ₂和QPP II/TiO ₂样品的成功合成。将QPP固定在TiO _{2表面上可以改善TiO}₂的光学性质，增强电荷分离并在可见光区域产生高效的天线。此外，与裸TiO ₂相比，QPP II/TiO ₂样品观察到的罗丹明B染料光降解速率常数提高了三倍。最后，考察了清除剂的效果