Highly Efficient Nitric Oxide Capture by Azole‐Based Ionic Liquids through Multiple‐Site Absorption

Abstract

A novel method for highly efficient nitric oxide absorption by azole-based ionic liquid was reported. The NO absorption capacity reached up to 4.52 mol per mol ionic liquid and is significant higher than the capacity other traditional absorbents. Moreover, the absorption of NO by this ionic liquid was reversible. Through a combination of experimental absorption, quantum chemical calculation, NMR and FT-IR spectroscopic investigation, the results indicated that such high capacity originated from multiple-site interactions between NO and the anion through the formation of NONOate with the chemical formula R R N-(NO )-N=O, where R and R are alkyl groups. We believe that this highly efficient and reversible NO absorption by an azole-based ionic liquid paves a new way for gas capture and utilization.

Design and tuning of ionic liquid–based HNO donor through intramolecular hydrogen bond for efficient inhibition of tumor growth

“…We thereby designed several primary amine-contained, anion-functionalized ILs (Fig. 1B) A facile neutralization reaction was applied to prepare the ILs, by which the reaction between amino acid and phosphonium or imidazolium hydroxide in ethanol yielded the amino-functionalized ILs (6). The structures of these ILs were confirmed by nuclear magnetic resonance (NMR) spectroscopy (see the Supplementary Materials).…”

Investigating the Effect of NO on the Capture of CO2 Using Superbase Ionic Liquids for Flue Gas Applications

“…[17][18][19] The amount of NO captured by the chemically absorbing superbase IL, trihexyltetradecylphosphonium tetrazolide ([P 66614 ][Tetz]), was 4.52 nNO:nIL with a pure feed of NO at 30 °C and 1 atm. 19 The capture of NO at concentrations (<0.25 %) has also been investigated, 20 with the effect of O 2 and H 2 O being considered, 21,22 often showing a negative impact on the system, and adversely affecting the reversibility of the system. For ILs to remain cost-effective for capturing CO2 in an industrial application, NO must have little effect on the IL, or an effective method of trapping/reducing the NO before exposure of the gas stream to the IL should be used, in order to minimise any negative impacts and extend the sorbents lifetime.…”

“…These desorption conditions were the same as applied after CO2 absorption whereby the ILs absorption capacity was fully restored.15 The small loss in weight (1.73 to 1.39 nNO:nIL) could be due to removal of physisorbed or weakly bound NO. In contrast, using [P66614][Tetz], 13 h was required for the weight to stabilise with 3.56 nNO:nIL captured (30 °C, 0.1 bar, 100 % NO) 19. 4.52 nNO:nIL was absorbed by [P66614][Tetz] at a higher NO partial pressure (30 °C, 1 atm, 100 % NO), however, 2.79 nNO:nIL remained after desorption (80 °C, 1 atm, N2),…”

Ionic Liquids Catalysis for Carbon Dioxide Conversion With Nucleophiles

“…Azole-functionalized ILs are another kind of versatile ILs that can be utilized in the absorption of different gases (Wang et al, 2011a , b ; Chen et al, 2015 , 2016c ; Cui et al, 2016 ). Also in the formation of urea, Deng and co-workers investigate the performance of various ILs in the reaction of CO 2 with 1,6-hexamethylenediamine to form polyurea (Wang et al, 2016b ).…”