Synthesis and preparation of ultra-low viscosity and high magnetic susceptibility magnetic ionic liquids

A magnetic ionic liquid (MIL) comprising:

• a cationic ligand comprising a diglycolic acid ester having the following formula (I)
• wherein R1 comprises an organic substituent having from about 2 carbons to about 24 carbons;
• and wherein R2 is an N—CH3, O, S, or thiophene;
• wherein the cationic ligand chelates a metal, and wherein the metal comprises nickel (Ni), copper (Cu), cobalt (Co), iron (Fe), manganese (Mn), chromium (Cr), vanadium (V), dysprosium (Dy), holmium (Ho), gadolinium (Gd), neodymium (Nd), europium (Eu), cerium (Ce), thulium (Tm), ruthenium (Re), terbium (Tb), erbium (Er), ytterbium (Yb), and a salt or a mixture thereof;
• an anionic ligand having the following general formula (II)
• [M(Y)x−] (II)
• wherein M is transition metal or rare earth metal ion;
• and Y is a chelating agent having the general formula (III):
• each of the R10 and R11 are independently a substituted or unsubstituted methyl, phenyl, thiophenyl, napthyl, alkyl, or aryl group;
• and x is 3 or 4;
• wherein M comprises nickel (Ni), copper (Cu), cobalt (Co), iron (Fe), manganese (Mn), chromium (Cr), vanadium (V), dysprosium (Dy), holmium (Ho), gadolinium (Gd), neodymium (Nd), europium (Eu), cerium (Ce), thulium (Tm), ruthenium (Re), terbium (Tb), erbium (Er), ytterbium (Yb), and salts or mixtures thereof.