Pressure-induced mesoscopic disorder in protic ionic liquids: first computational study

2016 ◽  
Vol 18 (4) ◽  
pp. 2297-2302 ◽  
Author(s):  
A. Mariani ◽  
R. Caminiti ◽  
M. Campetella ◽  
L. Gontrani

The application of high pressure to protic ionic liquids with short alkyl chains induces a progressive homogenization of the structure.

2021 ◽  
pp. 113036
Author(s):  
Emanuel A. Crespo ◽  
Liliana P. Silva ◽  
Cristina I.P. Correia ◽  
Mónia A.R. Martins ◽  
Ramesh L. Gardas ◽  
...  

2018 ◽  
Vol 196 ◽  
pp. 32-40 ◽  
Author(s):  
Murilo L. Alcantara ◽  
Pedro I.S. Ferreira ◽  
Gerardo O. Pisoni ◽  
Andressa K. Silva ◽  
Lúcio Cardozo-Filho ◽  
...  

2018 ◽  
Vol 20 (28) ◽  
pp. 19071-19081 ◽  
Author(s):  
Víctor Gómez-González ◽  
Borja Docampo-Álvarez ◽  
Hadrián Montes-Campos ◽  
Juan Carlos Otero ◽  
Elena López Lago ◽  
...  

Nanostructured solvation of Al3+ in an EAN ionic liquid, forming octahedral complexes with nitrate anions.


2013 ◽  
Vol 111 (22) ◽  
Author(s):  
Z. Wojnarowska ◽  
Y. Wang ◽  
J. Pionteck ◽  
K. Grzybowska ◽  
A. P. Sokolov ◽  
...  

2011 ◽  
Vol 56 (3) ◽  
pp. 224-230 ◽  
Author(s):  
Silvana Mattedi ◽  
Pedro J. Carvalho ◽  
João A.P. Coutinho ◽  
Víctor H. Alvarez ◽  
Miguel Iglesias

2021 ◽  
Vol 333 ◽  
pp. 115883
Author(s):  
José M. Otero-Mato ◽  
Alejandro Rivera-Pousa ◽  
Hadrián Montes-Campos ◽  
Oscar Cabeza ◽  
A. Heuer ◽  
...  

2021 ◽  
Vol 125 (5) ◽  
pp. 1416-1428
Author(s):  
Jing Ma ◽  
Yutong Wang ◽  
Xueqing Yang ◽  
Mingxuan Zhu ◽  
Baohe Wang

Molecules ◽  
2021 ◽  
Vol 26 (14) ◽  
pp. 4158
Author(s):  
Patrycja Glińska ◽  
Andrzej Wolan ◽  
Wojciech Kujawski ◽  
Edyta Rynkowska ◽  
Joanna Kujawa

There has been an ongoing need to develop polymer materials with increased performance as proton exchange membranes (PEMs) for middle- and high-temperature fuel cells. Poly(vinyl alcohol) (PVA) is a highly hydrophilic and chemically stable polymer bearing hydroxyl groups, which can be further altered. Protic ionic liquids (proticILs) have been found to be an effective modifying polymer agent used as a proton carrier providing PEMs’ desirable proton conductivity at high temperatures and under anhydrous conditions. In this study, the novel synthesis route of PVA grafted with fluorinated protic ionic liquids bearing sulfo groups (–SO3H) was elaborated. The polymer functionalization with fluorinated proticILs was achieved by the following approaches: (i) the PVA acylation and subsequent reaction with fluorinated sultones and (ii) free-radical polymerization reaction of vinyl acetate derivatives modified with 1-methylimidazole and sultones. These modifications resulted in the PVA being chemically modified with ionic liquids of protic character. The successfully grafted PVA has been characterized using 1H, 19F, and 13C-NMR and FTIR-ATR. The presented synthesis route is a novel approach to PVA functionalization with imidazole-based fluorinated ionic liquids with sulfo groups.


2021 ◽  
Vol 14 (1) ◽  
Author(s):  
Shihong Liu ◽  
Michael Gonzalez ◽  
Celine Kong ◽  
Scott Weir ◽  
Aaron M. Socha

Abstract Background Ionic liquids (ILs) are promising pretreatment solvents for lignocellulosic biomass, but are largely prepared from petroleum precursors. Benzaldehydes from depolymerized lignin, such as vanillin, syringaldehyde, and 4-methoxy benzaldehyde, represent renewable feedstocks for the synthesis of ionic liquids. We herein report syntheses of novel lignin-derived ionic liquids, with extended N-alkyl chains, and examine their melting points, cellulose dissolution capacities, and toxicity profiles against Daphnia magna and E. coli strain 1A1. The latter organism has been engineered to produce isoprenol, a drop-in biofuel and precursor for commodity chemicals. Results The new N,N-diethyl and N,N-dipropyl methyl benzylammonium ILs were liquids at room temperature, showing 75–100 °C decreased melting points as compared to their N,N,N-trimethyl benzylammonium analog. Extension of N-alkyl chains also increased antibacterial activity threefold, while ionic liquids prepared from vanillin showed 2- to 4-fold lower toxicity as compared to those prepared from syringaldehyde and 4-methoxybenzaldehyde. The trend of antibacterial activity for anions of lignin-derived ILs was found to be methanesulfonate < acetate < hydroxide. Microcrystalline cellulose dissolution, from 2 to 4 wt% after 20 min at 100 °C, was observed in all new ILs using light microscopy and IR spectroscopy. Conclusions Ionic liquids prepared from H-, S- and G-lignin oxidation products provided differential cytotoxic activity against E. coli and D. magna, suggesting these compounds could be tailored for application specificity within a biorefinery.


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