Mass Spectrometric Studies on Ionic Liquid Aggregates

Silva, Ricardo Manuel; Marrucho, Isabel M.; Coutinho, João A. P.; Fernandes, Ana M.

doi:10.1002/9780470947777.ch4

Cited by 1 publication

(2 citation statements)

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“…[40,[53][54][55][56] ChemPhysChem 2015, 16,1969 -1977 www.chemphyschem.org their saturated counterparts (pyrrolidiniun and piperidinium), 2) affinity decreases with increasing ring size for both aromatic and nonaromatic species, 3) affinity decreases with increasing alkyl chain length,and 4) for alkali metals the affinity increases as the cation radii decreases. The results also show that the A NTf À 2 trend observed in this work is analogous to that reported for [PF 6 ] À , [ BF 4 ] À ,a nd Br À , [27][28][29][30][31] thus suggesting that (at least for the four cases investigated) the gas-phase affinity order does not seem to significantly depend on the nature of the A À species.…”

Section: Mim]supporting

confidence: 85%

“…À by one half (the smaller the E 1/2 ,t he weaker the affinity of C + for Ao ro f A À for C), [29][30][31] 3) the measurement of the signal intensity corresponding to ag iven C + ,a st he nature of A À in ad issolved CA precursor wasc hanged (the smaller the intensity the stronger the C···A interaction), [32] and 4) competition experiments involving the comparison of the peak intensities corresponding to ChemPhysChem 2015, 16,1969 -1977 www.chemphyschem.org…”

Section: Hetero-cationic [Cac']mentioning

confidence: 99%

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Gas‐Phase Affinity Scales for Typical Ionic Liquid Moieties Determined by using Cooks’ Kinetic Method

2015

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Gas-phase affinity studies based on cations and anions commonly present in ionic liquid structures, give quantitative information about the magnitude of the interactions holding the two species together when ILs are formed. They also provide clues on how these interactions depend on the nature of the cationic and anionic moieties. In the present work, mass spectrometric experiments, performed using electrospray ionization quadrupole ion-trap and Fourier transform ion cyclotron resonance mass spectrometry, were used to obtain two affinity scales by Cooks' kinetic method: one scale for the various cations for the bis(trifluoromethylsulfonyl)imide anion, [NTf2 ](-) , and another for the different anions for the 1-butyl-3-methylimidazolium cation, [C4 mim](+) . The obtained results are compared with previously reported data and discussed in terms of the structural characteristics of the different cationic and anionic species.

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