Sol–gel synthesis of organic–inorganic hybrid materials comprising boehmite, silica, and thiazole dye
摘要:
A hybrid material was prepared from a boehmite sol and a thiazole derived azo dye. The thiazole azo dyes were subjected to hydrolytic polycondensation with vinyltriethoxysilane, tetraethoxysilane, and aluminium isopropoxide in different ratios to afford a hybrid of boehmite, silica, and the thiazole heterocycle azo dye. The structures of these hybrid materials were characterized using X-ray diffraction, Fourier-transform infrared analysis, Si-29- and Al-27-nuclear magnetic resonance, ultraviolet-visible absorption spectrophotometry, and an energy-dispersive X-ray spectroscopy. (C) 2012 Elsevier Ltd. All rights reserved.
The synthesis of vinyltriethoxysilane-modified heteroaryl thiazole dyes and silica hybrid materials
摘要:
Hybrid materials composed of tetraethoxysilane and heteroaryl 4-substituent-2-aminothiazoles were prepared. 4-Substituted acetophenone, thiourea and iodide were used to generate the intermediate, 4-substituted-2-aminothiazole, as coupling component, which was then coupled with p-nitroaniline and p-methoxyaniline to yield heteroaryl 4-substitued thiazole azo dyes. The dyes subsequently underwent hydrolytic polycondensation with vinyltriethoxysilane and tetraethoxysilane to yield hybrid, heteroaryl thiazole azo dyes, whose chemical structure was characterized using FT-IR, Si-29 NMR, H-1 NMR and EDS. (C) 2009 Elsevier Ltd. All rights reserved.