NOVELTY - Producing an ionic liquid comprises converting an ionic liquid having carbonate anion, bicarbonate anion or organo-anion into chalcogenide anion with a chalcogenide compound via a anionic exchange method.    USE - The ioinic liquid is useful: as binary as reactive component in precipitation reactions or multinary metal chalcogenides in organic solvents or in the reactive ionic liquid in melt flow iono thermal synthesis, in producing metal chalcogenide-based thin-film semiconductor materials from solution, and in producing metal chalcogenides and/or thin-film semiconductor materials in printed electronics strategy; as redox-active electrolyte for batteries, accumulators and electrochemical cells; as a redox mediator in dye solar cells and quantum dot-sensitized solar cells; as a solvent for chemical reactions; and as solvent and reactive component for elementary forms of chalcogens with the formation of ionic liquids having poly chalcogenide anion (all claimed).    ADVANTAGE - The method has simple purification procedure.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for:    (1) an ionic liquid having a cation and anion, prepared by above mentioned method, where anion comprises an organosilyl chalcogenide; and    (2) use of the ionic liquid as binary as reactive component in precipitation reactions or multinary metal chalcogenides of formula (MnM'mSxSeyTez) (X) in organic solvents or in the reactive ionic liquid in melt flow iono thermal synthesis, in producing metal chalcogenide-based thin-film semiconductor materials (MnM'mSxSeyTez) (XI) from solution, and in producing metal chalcogenides and/or thin-film semiconductor materials in printed electronics strategy, where the various chalcogen components in the form of various solutions of the chalcogenide containing ionic liquids on the target is placed on the solutions reactive metal component through various coating, spray and print processes for reaction.    M, M' = metals of s-block, p-block, d-block or f-block, preferably Li, Na, K, Rb, Be, Mg, Ca, Sr, Ba, Sc, Y, La, Ac, Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W, Mn, Re, Fe, Ru, Os, Co, Rh, Ir, Ni, Pd, Pt, Cu, Ag, Au, Zn, Cd, Hg, Al, Ga, In, TI, Si, Ge, Sn, Bi, Eu, Gd, La, Ce, Pr, Nd, Sm, Tb, Dy, Ho, Er, Tm, Yb or Lu; and    n, m, x, y, z = not defined.