Effect of Temperature on the Purity of Product in the Preparation of 1-Butyl-3-methylimidazolium-Based Ionic Liquids

2004 ◽  
Vol 59 (7) ◽  
pp. 763-770 ◽  
Author(s):  
Johanna Kärkkäinen ◽  
Janne Asikkala ◽  
Risto S. Laitinen ◽  
Marja K. Lajunen

The preparation of room-temperature ionic liquids 1-butyl-3-methylimidazolium chloride, hexafluorophosphate, and dicyanamide by microwave-assisted reaction in non-solvent and solvent conditions has been studied in this contribution. A special emphasis is put on the effect of the reaction temperature on the purity of ionic liquids that was monitored by electrospray ionisation mass spectrometry and 1H NMR. The X-ray structure of 1-butyl-3-methylimidazolium chloride is presented.

2019 ◽  
Vol 25 (3) ◽  
pp. 276-280
Author(s):  
Canan URAZ

In this study, electroless nickel (EN) plating on acrylonitrile butadiene styrene (ABS) engineering plastic using room temperature ionic liquids (RTIL) was studied. Electroless plating is a fundamental step in metal plating on plastic. This step makes the plastic conductive and makes it possible to a homogeneous and hard plating without using any hazardous and unfriendly chemical such as palladium, tin, etc. In the industry there are many distinct chemical materials both catalysts and activation solutions for the electroless bath which is one of the most important parts of the process. In this study the effects of the ionic liquid, plating time, and sand paper size were investigated on electroless nickel plating. The etching and the plating processes were performed with environmentally friendly chemicals instead of the chromic and sulphuric acids used in the traditional processes. Experiments were carried out with and without ionic liquid, EMIC, 1-ethyl-3-methyl imidazolium chloride (C6H11N2Cl), and with 400, 500 and 800 grit sandpaper with the application of the sand attrition process and 70, 80, and 90 °C bath temperatures with 30, 60, and 90 minutes of deposition time. The surface morphology and the thickness of deposit analysis were performed using the Fischer scope X-Ray XDL-B System, X-ray Diffraction (XRD), and Scanning Electron Microscopy (SEM). Due to the results of the experiments and analysis, the electroless nickel plating on ABS plastic was a success. The best plating was obtained at 5.010 μm as the maximum plating thickness, at 90 min of plating time and 80 °C as the plating bath temperature for electroless nickel plating on ABS plastic whit the surface activated with 800 grit sandpaper using EMIC ionic liquid. DOI: http://dx.doi.org/10.5755/j01.ms.25.3.20116


2010 ◽  
Vol 114 (50) ◽  
pp. 16838-16846 ◽  
Author(s):  
Harsha V. R. Annapureddy ◽  
Hemant K. Kashyap ◽  
Pablo M. De Biase ◽  
Claudio J. Margulis

2011 ◽  
Vol 287-290 ◽  
pp. 529-534 ◽  
Author(s):  
Feng Liu ◽  
Rong Yi Lin ◽  
Zhi Wang ◽  
Jie Liang

Barium carbonate (BaCO3) crystals with different morphologies were synthesized using BaCl2·2H2O by a carbonation method in water/ionic liquids (ILs) mixed solvents. The as-prepared products were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM), and the results indicated that the types of ILs and the mole ratio of water to ILs played important roles in determining the morphologies of the products. The analysis of the XRD pattern showed that ILs had an influence on the crystallinity of BaCO3. When the mole ratio of water to ILs increased, the size of BaCO3 crystals increased and the morphology gradually changed from spherical to oval and rod-like. A microemulsion model was employed to explain this mechanism.


2011 ◽  
Vol 115 (30) ◽  
pp. 9507-9508 ◽  
Author(s):  
Harsha V. R. Annapureddy ◽  
Hemant K. Kashyap ◽  
Pablo M. De Biase ◽  
Claudio J. Margulis

2016 ◽  
Vol 69 (6) ◽  
pp. 645 ◽  
Author(s):  
Lu Jiang ◽  
Zhe Wang ◽  
Shi-Qiang Bai ◽  
Xian Jun Loh ◽  
T. S. Andy Hor

Three novel 1D coordination polymers [M(L1)2(OH2)2(ClO4)2]n (M = Mn (1), Co (2)) and [Ni(L1)2(OH2)2(NO3)2]n (3), and two mononuclear complexes [Fe(L2)2(MeOH)2(ClO4)2] (4) and [Co(L2)2(OH2)2(ClO4)2] (5) were prepared from 2-(((1-(pyridin-n-ylmethyl)-1H-1,2,3-triazol-4-yl)methyl)thio)pyridine ligands (n = 4 (L1), and 2 (L2)). The complexes 1–5 were characterised by single-crystal X-ray diffraction (XRD), powder XRD, thermogravimetric analysis, elemental analysis, infrared, and electrospray ionisation mass spectrometry analyses. The complexes 1–5 showed good purity and thermal stability. The structural outcome of 1–3 is driven by the double and open-bridging coordination mode preference of the spacer L1 which favours the formation of polymeric 18-member metallomacrocycles. Use of an isomeric L2 with different picolyl nitrogen orientation, which favours chelate formation, resulted in mononuclear complexes 4 and 5. This work demonstrates a simple but powerful spacer-directed strategy to define and construct coordination frameworks tuned by different metal characters and hybrid 1,2,3-triazoles.


2013 ◽  
Vol 68 (5-6) ◽  
pp. 598-604 ◽  
Author(s):  
Shuang Yue ◽  
Da-Wei Fang ◽  
Jun Li ◽  
Shu-Liang Zang ◽  
Ming-Dong Zhou ◽  
...  

A series of air- and water-stable imidazolium perrhenate-based room-temperature ionic liquids [(RT)ILs] of the type [Cnmim][ReO4] (Cnmim = 1-CnH2n+1-3-methylimidazolium, n = 2, 4, 5, 6, 8, 10, 12) have been synthesized and characterized by 1H and 13C NMR spectroscopy, IR spectroscopy, electrospray ionization mass spectrometry (ESI-MS), and elemental analysis (EA). The effect of the variation of the alkyl chain length on physical properties such as melting point, thermal stability, density, and conductivity was examined


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