Interaction between Methanol and the Cl-, Br-, I-, NO3-, ClO4-, BF4-, SO3CF3- and PF6- Anions Studied by FTIR Spectroscopy.

Molecular states of water in room temperature ionic liquidsElectronic Supplementary Information available. See http://www.rsc.org/suppdata/cp/b1/b106900d/

“…The comparison of our spectroscopic results with the studies of waterasaltaCH 2 Cl 2 systems 27 and with studies of isotopically dilute HDO molecules of water 28 shows that the relative order of the strength of interaction of water with anions in the systems containing the same anions as in the RTILs studied here is identical. Our ®ndings are also consistent with the work on the interaction between methanol and various anions, 29 where exactly the same trend of basicity of the anions was shown, based on the shifts of the n(O±H) band of methanol dissolved in solutions of salts in CH 2 Cl 2 . The n(O±H) band of methanol dissolved in I appeared at ca.…”

“…Table 1 27 and with studies of isotopically dilute HDO molecules of water 28 shows that the relative order of the interaction of water with anions in the systems containing the same anions as in the RTILs studied here is identical. Our findings are also consistent with the work on the interaction between methanol and various anions, 29 Nevertheless, we cannot exclude the presence of water-water aggregates in these RTILs at higher water concentrations when water is added into these RTILs. Indeed, addition of water into (I) to achieve saturation conditions (ca.…”

“…3618 cm À1 , which coincides with the position reported for the n(O±H) band of methanol in a solution containing [PF 6 ] ± in CH 2 Cl 2 . 29 This also indicates that the relative basicity of anions in dilute solutions and in ionic liquids is similar. It is important to note that in the latter case methanol was dissolved in RTILs in the absence of any other solvent.…”

Combining ionic liquids and supercritical fluids: in situ ATR-IR study of CO2 dissolved in two ionic liquids at high pressures

“…There is a report implying that [BF 4 ] 2 is a stronger Lewis base than [PF 6 ] 2 based on the measurements of the coordinating ability of these anions. 12 Our spectroscopic assignment of the strength of interaction between CO 2 and anions in the two ionic liquids is also consistent with recent work 13 on the interactions between methanol and various anions where it was shown that [BF 4 ] 2 is a stronger proton acceptor relative to [PF 6 ] 2 . Preliminary results for ionic liquids containing anions that are stronger bases, compared to [bmim][PF 6 ] and [bmim][BF 4 ], e.g.…”

Quantification of Conventional and Nonconventional Charge-Assisted Hydrogen Bonds in the Condensed and Gas Phases

“… a The corresponding data for MeOH···[A] − H-bonds are given in parentheses. b Reported for methanol solution in [C 4 mim]­[PF 6 ] ionic liquid and a MeOH/[Et 4 N]­[PF 6 ] 1:1 mixture in the CH 2 Cl 2 solution c Estimated relative to the experimental νOH frequency of MeOH in the gas phase (3687 cm –1 ) d Reported for a MeOH/[Et 4 N]­[BF 4 ] 1:1 mixture in the CH 2 Cl 2 solution …”