LAUSR

Abstract In this study, tris(hydroxymethyl)methane ammonium hydrogensulphate [(THA)(HSO4)] was synthesized as the first nanoaliphatic ammonium-based ionic liquid via a simple chemical route in water. The [(THA)(HSO4)] ionic liquid was characterized by various techniques such as XRD, SEM, TEM, AFM, 1H NMR, 13C NMR, FT-IR, MS, TG, DTG and elemental analysis and successfully applied as an eco-friendly and recyclable catalyst for the synthesis of bis(indolyl)methane derivatives at room temperature under solvent-free conditions. Taking the environment and economy into consideration, the work presented here has the merits of environmental friendliness, high yields, simple work-up, easy operation and the avoidance of the organic solvents and inexpensive catalysts. In this work, some bis(indolyl)methane derivatives were synthesized and reported for the first time.