Synthesis of a TiO2 Photocatalyst for Dehydrogenative Cross-Coupling of (Hetero)Arenes
- 作者: Dorosheva I.B.1,2, Rempel A.A.1,2, Trestsova M.A.2, Utepova I.A.2,3, Chupakhin O.N.2,3
-
隶属关系:
- Institute of Solid State Chemistry, Ural Branch, Russian Academy of Sciences
- Yeltsin Federal University
- Postovsky Institute of Organic Synthesis, Ural Branch, Russian Academy of Sciences
- 期: 卷 55, 编号 2 (2019)
- 页面: 155-161
- 栏目: Article
- URL: https://journals.rcsi.science/0020-1685/article/view/158642
- DOI: https://doi.org/10.1134/S0020168519010047
- ID: 158642
如何引用文章
详细
Nanostructured titanium dioxide (TiO2) with a particle size from 7 to 50 nm, photocatalytically active for organic reactions under illumination with visible light, has been prepared by sol–gel synthesis at different pH values of the starting solution. X-ray diffraction data demonstrate the formation of a crystalline anatase phase in an acid medium and an amorphous phase in an alkaline medium. Annealing at a temperature of 350°C for 4 h has led to a phase transition from the amorphous structure to anatase in all of the samples. The particle size has been shown to increase from 7 to 50 nm as the solution pH rises from 3 to 9. Further increasing the pH value to 10 reduces the particle size to 23 nm. Diffuse reflection spectra indicate that the band gap of the samples ranges from 2.9 to 3.4 eV and that annealing reduces it to 2.8–3.2 eV. According to comparative testing results, the efficiency of the synthesized TiO2 as a catalyst for oxidative \({\text{S}}_{{\text{N}}}^{{\text{H}}}\) cross-coupling of acridine with indole is comparable to that of the commercially available catalysts Degussa P25 and Hombifine N, as evidenced by product yields above 50%.
作者简介
I. Dorosheva
Institute of Solid State Chemistry, Ural Branch, Russian Academy of Sciences; Yeltsin Federal University
编辑信件的主要联系方式.
Email: i.b.dorosheva@urfu.ru
俄罗斯联邦, Pervomaiskaya ul. 91, Yekaterinburg, 620219; ul. Mira 19, Yekaterinburg, 620002
A. Rempel
Institute of Solid State Chemistry, Ural Branch, Russian Academy of Sciences; Yeltsin Federal University
Email: i.b.dorosheva@urfu.ru
俄罗斯联邦, Pervomaiskaya ul. 91, Yekaterinburg, 620219; ul. Mira 19, Yekaterinburg, 620002
M. Trestsova
Yeltsin Federal University
Email: i.b.dorosheva@urfu.ru
俄罗斯联邦, ul. Mira 19, Yekaterinburg, 620002
I. Utepova
Yeltsin Federal University; Postovsky Institute of Organic Synthesis, Ural Branch, Russian Academy of Sciences
Email: i.b.dorosheva@urfu.ru
俄罗斯联邦, ul. Mira 19, Yekaterinburg, 620002; ul. S. Kovalevskoi/Akademicheskaya 22/20, Yekaterinburg, 620990
O. Chupakhin
Yeltsin Federal University; Postovsky Institute of Organic Synthesis, Ural Branch, Russian Academy of Sciences
Email: i.b.dorosheva@urfu.ru
俄罗斯联邦, ul. Mira 19, Yekaterinburg, 620002; ul. S. Kovalevskoi/Akademicheskaya 22/20, Yekaterinburg, 620990
补充文件
