Journal of the Iranian Chemical Society p. 2615 - 2629 (2018)
Update date:2022-08-11
Topics:
Fareghi-Alamdari, Reza
Nadiri Niri, Mehri
Hazarkhani, Hassan
Zekri, Negar
Abstract: Supported diacidic ionic liquid on magnetic silica nanoparticles (SDAIL@magnetic nanoSiO2) was successfully prepared through a multi-step approach. 2,2- bis ((3- methylimidazolidin-1-yl) methyl) propane- 1,3- diol bromide salt was immobilized onto the surface of magnetic silica nanoparticles via covalent bonding to prepare a novel powerful acidic catalyst. The synthesized catalyst was characterized by FT-IR, SEM, TGA, VSM, N2 adsorption–desorption measurements and acid-base titration. The catalytic activity of the prepared SDAIL@magnetic nanoSiO2 was investigated for the selective diesterification of alcohols by phthalic anhydride to afford corresponding dialkyl plasticizers under solvent-free conditions. The nature of two acidic counter anions as well as the presence of Lewis acidic species (Fe3O4) on the magnetic nanosilica and high surface area of the nanosilica influenced the behavior of the catalyst. Surperisingly, the high acidic character of the catalyst facilitates the reaction with a short reaction time. Furthermore, TG analysis strongly demonstrates that major content of IL is still stable on the support up to 290?°C, so catalyst has a good thermal stability. Under the optimized conditions, the conversion of phthalic anhydride was 100% and diester plasticizers were obtained with excellent yields (80–100%). The SDAIL@magnetic nanoSiO2 catalyst showed a good reusability and could be easily separated from the reaction mixture using an external magnet thanks to its superparamagnetic behavior and reused for several runs without significant activity loss. An important advantage of the SDAIL@magnetic nanoSiO2 was its high-hydrophilicity resulted in excellent selectivity towards the formation of only diesters which are commonly used plasticizers in different industries. Graphical abstract [Figure not available: see fulltext.].
View MoreShuanghe Bio-Technology Limited
Contact:+86-571-61710758,18968016640
Address:Jinqiao north road 916# Fuyang
Contact:86-512-87182056
Address:No.128 Fangzhou Rd, Suzhou Industrial Park, China, 215125, China
Contact:+86-0592 5353131
Address:No.56 Guani Road Software Park 2,Siming District
Kunshan Yalong Trading Co,.Ltd
Contact:86-512-57621185
Address:805-807 Room Hongqiao Mansion ,1088 West Qianjin Road, Kunshan, Jiangsu,China
Dalian Join King Biochemical Tech. Co., Ltd.
Contact:0411 39216206
Address:814 First State Blvd
Doi:10.1134/S0036023612010184
(2012)Doi:10.1039/c4tb02036g
(2015)Doi:10.1016/S0040-4039(01)00613-X
(2001)Doi:10.1063/1.456082
(1989)Doi:10.14233/ajchem.2015.18836
(2015)Doi:10.1002/cplu.201500195
(2015)