Removal of methylene blue by new tunable aryl/alkyl ionic liquids/salts (TAAILs) from aqueous solution

Tunable aryl alkyl pyrazolium tetrafluoroborate ionic liquids/salts: synthesis, characterization, and applications for removal of methyl orange from aqueous solution

“…The 2-ethyl-1-(p-X-phenyl)-3,5-dimethylpyrazolium methanesulfonate [X: −Br (2a), −OCH 3 (2b), −NO 2 (2c)] and 2-butyl-1-(p-X-phenyl)-3,5-dimethylpyrazolium methanesulfonate [X: −Br (3a), −OCH 3 (3b), −NO 2 (3c)] salts were synthesized by following the reported procedure [ 30 ]. The 2c and 3c compounds have been synthesized for the first time in this study.…”

“…Synthetic dyes generally used in textile, cosmetic, plastic, food, and drug industries cause a generation of large amounts of dye-polluted water bodies worldwide. Thus, many studies, including chemical, physical, and biological methods, have been conducted for removing dyes from water bodies [26][27][28][29][30]. Methyl orange (MO), generally used as an acid-base indicator, is an anionic, water-soluble azo group of synthetic dye.…”

Crystal structure of 3,3′-(1,2-phenylenebis(methylene))bis(1-methyl-1H-imidazol-3-ium) bis(hexafluoridophosphate), C16H20F12N4P2

“…Ionic liquid (ILs) refers to a salt composed solely of ions which generally has a melting point of 100°C or below [5]. Because of the advantages of low volatility, non-flammability, high polarity, wide window of electrochemical performance, and large structural adjustability, it has been widely studied and applied [6][7][8][9]. When the anion is hexafluorophosphate, this imidazole-based ionic liquids may show good hydrophobicity, and even temperature sensitivity of solubility.…”