title: Synthesis and application of magnetic deep eutectic solvents: Novel solvents for ultrasound assisted liquid-liquid microextraction of thiophene.
abstract: Two novel magnetic deep eutectic solvents (MDESs), comprised of cheap and simple components named [choline chloride/phenol] [FeCl4] and [choline chloride/ethylene glycol] [FeCl4] were prepared and characterized by CHN elemental analysis, proton nuclear magnetic resonance (1H NMR), vibrating sample magnetometery (VSM), Raman, Fourier transform-infrared (FT-IR) and UV-Vis spectrometery. The extraction efficiency of the prepared MDESs has been investigated in ultrasound assisted liquid-liquid microextraction based MDES (UALLME-MDES). Briefly, MDESs were added to n-heptan containing thiophene. Then, MDESs were dispersed in n-heptane by sonication. After that, microdroplets of MDESs were collected by a magnet and the remained concentration of thiophene in n-heptane phase was analyzed by GC-FID. The results indicated that [choline chloride/phenol] [FeCl4] has higher extraction efficiency than [choline chloride/ethylene glycol] [FeCl4]. This work opens a new way to the application of MDESs.
authors: Department of Chemistry, Faculty of Science, Ilam University, Ilam 69315-516, Iran.
authors: Tahere
authors: T
authors: Khezeli
authors: Department of Chemistry, Faculty of Science, Ilam University, Ilam 69315-516, Iran. Electronic address: daneshfara@yahoo.com.
authors: Ali
authors: A
authors: Daneshfar
keywords: GC-FID; Magnetic deep eutectic solvents; Thiophene; Ultrasound assisted liquid-liquid microextraction