Phase boundaries, structural characteristics, and NMR spectra of ionic liquid-in-oil microemulsions containing double chain surface active ionic liquid: a comparative study.

摘要: A method developed for the first time, to create a huge number of ionic liquid (IL)-in-oil microemulsions has been discussed in our earlier publication (Rao, V. G.; Ghosh, S.; Ghatak, C.; Mandal, Brahmachari, U.; Sarkar, N. J. Phys. Chem. B 2012, 116, 2850-2855). Here, we present facile methods adjust structural parameters using different liquids (ILs) as additives (polar phase). We have characterized ILs/[C(4)mim][AOT]/benzene ternary system by performing phase behavior study, dynamic light scattering (DLS) measurements, and (1)H NMR measurements. The IL loading capacity (area single region) (i) increases with increase alkyl chain length cation ILs follows trend [C(6)mim][TF(2)N] > [C(4)mim][TF(2)N] [C(2)mim][TF(2)N], (ii) decrease anion interaction strength added [C(4)mim][PF(6)] [C(4)mim][BF(4)]. So depending on used, amount within core can be easily manipulated directly affect size aggregates microemulsions. increasing R value (R is defined molar ratio RTILs [C(4)mim][AOT]) was found maximum case [C(2)mim][TF(2)N]/[C(4)mim][AOT]/benzene [C(2)mim][TF(2)N] [C(6)mim][TF(2)N]. However, almost same anions. most promising fact about IL-in-oil their high thermal stability compared that aqueous microemulsions, so investigated effect temperature at = 1.0. It evident from measurements remain monodisperse nature temperature, all cases, decreases temperature. water addition (IL/O) also studied detail. By far, this report where containing hydrophobic being reported hydrophilic ILs. observed prominent microstructure In spectra provide more detailed information intra/intermolecular interactions thus affording clear picture locations RTILs/[C(4)mim][AOT]/benzene molecules