scholarly journals Novel and Reusable Mesoporous Silica Supported 4-Methylbenzenesul- fonate-functionalized Ionic Liquids for Room Temperature Highly Efficient Preparation of 2,4,5-Triaryl-1H-imidazoles

2021 ◽  
Vol 65 (4) ◽  
Author(s):  
Yang Liu ◽  
Qi Rong ◽  
Chen Chen ◽  
Hu Yu Lin

Abstract. A series of mesoporous materials supported ionic liquids were prepared and tested as effective and practical catalysts for the synthesis of 2,4,5-triaryl-1H-imidazoles. The effects of type of catalysts, catalyst amount, and catalyst stability have also been investigated in detail, the catalyst Ti-SBA-15@ILTsO exhibited excellent activity in excellent yields of 92 % ~ 99 % with low catalyst amount at room temperature within 1 h. In addition, the supported ionic liquid can be easily recovered and reused for six times with satisfactory catalytic activity. Furthermore, a general synergetic catalytic mechanism for the reaction was proposed. Maybe this work employing Ti-SBA-15@ILTsO as highly efficient and stable catalyst for the synthesis of 2,4,5-triaryl-1H-imidazoles has potential commercial applications.   Resumen. Se prepararon y probaron una serie de materiales mesoporosos soportados con líquidos iónicos como catalizadores eficaces y prácticos para la síntesis de 2,4,5-triaryl-1H-imidazoles. También se investigaron en detalle los efectos del tipo de catalizadores, la cantidad de catalizador y la estabilidad del catalizador. El catalizador Ti-SBA-15@ILTsO mostró una excelente actividad con rendimientos excelentes del 92 % ~ 99% con una baja cantidad de catalizador a temperatura ambiente en 1 h. Además, el líquido iónico soportado puede recuperarse fácilmente y reutilizarse durante seis veces con una actividad catalítica satisfactoria. Por otro lado, se propuso un mecanismo catalítico sinérgico general para la reacción. Este trabajo que emplea Ti-SBA-15@ILTsO como catalizador altamente eficiente y estable para la síntesis de 2,4,5-triaril-1H-imidazoles puede tener aplicaciones potencialmente comerciales.

RSC Advances ◽  
2014 ◽  
Vol 4 (74) ◽  
pp. 39572-39575 ◽  
Author(s):  
Gang Yuan ◽  
Feng Zhang ◽  
Jiao Geng ◽  
You-Ting Wu

The molecular-imprinting like highly efficient reversible absorption of NO2 in the imidazole sulfonate room-temperature ionic liquids was found, which opens a new way to clean the polluted air and re-utilize the wasted energy in nitrogen oxides.


RSC Advances ◽  
2018 ◽  
Vol 8 (12) ◽  
pp. 6288-6292 ◽  
Author(s):  
Wei Feng ◽  
Tingting Huang ◽  
Liqian Gao ◽  
Xianfeng Yang ◽  
Wenbin Deng ◽  
...  

A novel textile-supported nanosilver (TsNS) catalyst was prepared and applied in nitroaromatic reduction with excellent activity, stability and recyclability.


2015 ◽  
Vol 10 (4) ◽  
pp. 221-228 ◽  
Author(s):  
Syed Nasir Shah ◽  
Kallidanthiyil Chellappan Lethesh ◽  
M. I. Abdul Mutalib ◽  
Rashidah Binti Mohd Pilus

Abstract In this study, functionalized silica supported ionic liquids phases (SILPs) were synthesized and characterized using Fourier Transform infrared (FTIR) spectroscopy, CHNS elemental analysis, thermo gravimetric analysis (TGA) and scanning electron microscopy (SEM). The adsorption of model naphthenic acid such as hexanoic acid, benzoic acid and commercial naphthenic acid from dodecane/kerosene was also investigated. The silica supported ionic liquids are good adsorbent for the removal of naphthenic acid from highly acidic model oil. The regeneration of supported ionic liquid phases as well as recovery of naphthenic acids from the supported ionic liquid phases (SILPs) was investigated.


2012 ◽  
Vol 626 ◽  
pp. 509-513
Author(s):  
Mat Dagang Nurul Safiah ◽  
Mohammad Azmi Bustam ◽  
Normawati M. Yunus ◽  
Zakaria Man

Solid supported ionic liquids can be used to overcome the high viscosity issue of ionic liquids and help increase the efficiency of CO2 removal. In this research, [hmi [Tf2 was impregnated into porous silica dioxide (SiO2) and characterized using Porous and Surface Analyzer, Thermogravimetric Analysis (TGA) and Spectroscopy RAMAN. The CO2 solubility was measured at different pressure at room temperature. The mole fraction of CO2 captured was increased as the pressure increased, and the highest mole fraction was at 40 bar. The mole fraction of CO2 captured at 40 bar for SiO2-[hmi [Tf2 was 0.812 which was higher compared to pure [hmi [Tf2, with mole fraction of 0.650. Henrys Law Constant (KH) was higher for SiO2-[hmi [Tf2 with 26.8±5.2 bar while for [hmi [Tf2, the KH was 35.4±3.3 bar.


Heliyon ◽  
2019 ◽  
Vol 5 (7) ◽  
pp. e02183 ◽  
Author(s):  
Bárbara B. Polesso ◽  
Franciele L. Bernard ◽  
Henrique Z. Ferrari ◽  
Evandro A. Duarte ◽  
Felipe Dalla Vecchia ◽  
...  

2019 ◽  
Vol 33 (7) ◽  
pp. 73-77 ◽  
Author(s):  
Ning Deng ◽  
Min Li ◽  
Sergio L. De Rooy ◽  
Bilal El-Zahab ◽  
Isiah Warner

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