Table 1.
Details of the sensing materials used in the study and the quartz crystal microbalance (QCM) frequency shift of the sensing layer deposition.
| Sensing Material | Deposition Frequency Shift | ||
|---|---|---|---|
| Identifier | CAS # | Full Name | (Hz) |
| [C2mim][otf] | 145022-44-2 | 1-Ethyl-3-methylimidazolium triflate | 1688 |
| [C2mim][Tf2N] | 174899-82-2 | 1-Ethyl-3-methylimidazolium | 1184 |
| bis(trifluoromethylsulphonyl)imide | |||
| [C2mim][Ac] | 143314-17-4 | 1-Ethyl-3-methylimidazolium acetate | 1584 |
| [C2mim][dca] | 370865-89-7 | 1-Ethyl-3-methylimidazolium dicyanamide | 1514 |
| [C4mim][dca] | 448245-52-1 | 1-butyl-3-methylimidazolium dicyanamide | 1300 |
| [C4mim][otf] | 174899-66-2 | 1-Butyl-3-methylimidazolium triflate | 1149 |
| [C4mim][Ac] | 284049-75-8 | 1-Butyl-3-methylimidazolium acetate | 967 |
| [C4mim][Cl] | 79917-90-1 | 1-butyl-3-methylimidazolium chloride | 1006 |
| [C4mim][Tf2N] | 174899-83-3 | 1-butyl-3-methylimidazolium | 1509 |
| bis(trifluoromethylsulfonyl)imide | |||
| [C4mim][Br] | 85100-77-2 | 1-butyl-3-methylimidazolium bromide | 1200 |
| [C6mim][Tf2N] | 382150-50-7 | 1-hexyl-3-methylimidazolium | 1194 |
| bis[(trifluoromethyl)sulfonyl]imide | |||
| [C6mim][otf] | 460345-16-8 | 1-hexyl-3-methylimidazolium | 1268 |
| trifluoromethanesulfonate | |||
| [C6mim][PF6] | 304680-35-1 | 1-hexyl-3-methylimidazolium hexafluorophosphate | 1042 |
| [C6mim][Br] | 85100-78-3 | 3-hexyl-1-methyl-1H-imidazolium bromide | 1119 |
| [C6mim][Cl] | 171058-17-6 | 1-hexyl-3-methylimidazolium chloride | 1300 |
| [C8mim][PF6] | 304680-36-2 | 1-octyl-3-methylimidazolium | 1438 |
| Hexafluorophosphate | |||
| [C8mim][Tf2N] | 178631-04-4 | 1-octyl-3-methylimidazolium | 1175 |
| bis[(trifluoromethyl)sulfonyl]imide | |||
| [C10mim][BF4] | 244193-56-4 | 1-Decyl-3-methylimidazolium | 1055 |
| tetrafluoroborate | |||
| [BmPY][Tf2N] | 623580-02-9 | 1-Butyl-1-methylpiperidinium | 1182 |
| bis(trifluoromethylsulphonyl)imide | |||
| [N4111][Tf2N] | 324575-10-2 | Butyltrimethylammonium | 1561 |
| bis(trifluoromethanesulfonyl)imide | |||
| [Py41][Tf2N] | 223437-11-4 | 1-Butyl-1-methylpyrrolidinium bis(trifluoromethanesulfonyl)imide | 1163 |
| [P4441][Tf2N] | 324575-10-2 | Tributylmethylphosphonium | 1293 |
| bis(trifluoromethanesulfonyl)imide | |||
| [N1888][Tf2N] | 258273-75-5 | Methyltrioctylammonium | 1156 |
| bis(trifluoromethylsulphonyl)imide | |||
| TCP | 1330-78-5 | Tricresyl phosphate | 1352 |
| APIEZON-L | 8009-03-08 | Petrolatum (Vaseline) | 1339 |
| PEG 1k | 25322-68-3 | Poly(ethylene glycol) 1,000 | 1169 |
| OV-17 | 63148-58-3 | Methyl Phenyl Silicone Oil | 1179 |
| SIPONATE DS-10 | 25155-30-0 | Sodium dodecylbenzenesulfonate | 1230 |