کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
177050 | 458962 | 2012 | 6 صفحه PDF | دانلود رایگان |

Imidazolium based nitrite ionic liquid containing trimethoxysilyl group was prepared from the reaction of N-methylimidazole and (3-chloropropyl) trimethoxysilane. This ionic liquid was immobilized on silica covalently to give nanoparticles with the imidazolium nitrite moiety remaining intact. The diazotization reaction was performed as a model reaction to examine the activity of these nanoparticles as a nitrosonium source. Excellent performance was exhibited in the diazotization reaction of various aniline derivatives in the presence of HCl under mild heterogeneous conditions (room temperature and short reaction time). In-situ coupling of diazonium salts to a range of tertiary anilines, phenols and naphthols afforded the requisite azo dyes in good yield, using standard experimental procedures.
► New nano nitrite ionic liquid immobilized on silica was synthesized.
► An efficient diazotization of anilines using this new ionic liquid is described.
► Azo dyes were prepared via in situ azo-coupling reaction in good yields.
Journal: Dyes and Pigments - Volume 92, Issue 3, March 2012, Pages 1308–1313