Nano TiCl4/γ-Al2O3: An efficient heterogeneous solid acid catalyst for rapid and solvent-less synthesis of azo dyes based on 2-naphthol at room temperature

被引：6
|
作者：
Bamoniri, Abdolhamid [1 ]
Yaghmaeiyan, Nahid [1 ]
Omidvar, Sayed Mohammad Hosein [1 ]
机构：
[1] Univ Kashan, Fac Chem, Dept Organ Chem, Kashan, Iran
来源：
RESULTS IN CHEMISTRY | 2023年 / 5卷
关键词：
2-Naphthol; TiCl4/gamma-Al2O3; Nanoparticles; Diazonium salt; Diazo coupling; Solvent-free; ONE-POT SYNTHESIS; ENVIRONMENTALLY FRIENDLY APPROACH; 2,4,5-TRISUBSTITUTED IMIDAZOLES; REUSABLE CATALYST; GREEN SYNTHESIS; KAOLIN-SO3H; NANOPARTICLES; DERIVATIVES; FORMAZANS;
D O I：
10.1016/j.rechem.2023.100853
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
A green heterogeneous solid acid was prepared as an extremely efficient catalyst, through the reaction of gamma-alumina with titanium tetrachloride. Nano TiCl4/gamma-Al2O3 was characterized by fourier transform infrared spectroscopy (FT-IR), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), energy-dispersive X-ray spectroscopy (EDS), Brunner-Emmet-Teller (BET) surface area analysis, X-ray fluorescence (XRF) and thermal gravimetric analysis (TGA). Nano TiCl4/gamma-Al2O3 was used for the synthesis of aryl diazonium salts as the starting reactant and then, diazo coupling with 2-naphthol produced the azo dyes in a solvent-free medium at room temperature (25 degrees C). The work-up of the reaction is easy, and the catalyst is removed from the products by simple filtration.
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页数：7
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