TY - JOUR
T1 - Task-specific ionic liquid functionalized-MIL-101(Cr) as a heterogeneous and efficient catalyst for the cycloaddition of CO2 with epoxides under solvent free conditions
AU - Bahadori, Mehrnaz
AU - Tangestaninejad, Shahram
AU - Bertmer, Marko
AU - Moghadam, Majid
AU - Mirkhani, Valiollah
AU - Mohammadpoorbaltork, Iraj
AU - Kardanpour, Reihaneh
AU - Zadehahmadi, Farnaz
N1 - Publisher Copyright:
© 2019 American Chemical Society.
PY - 2019/2/18
Y1 - 2019/2/18
N2 - A novel heterogeneous catalyst was synthesized by immobilization of a carboxylic acid- and imidazolium-based ionic liquid on the mesoporous MIL-101(Cr) (MIL-101(Cr)-TSIL) and used to convert abundant, nontoxic, economical and renewable CO 2 gas to cyclic carbonates without the need for a cocatalyst or a solvent. The catalyst was characterized in detail by multiple techniques such as XRD, TEM, SEM, EDX, DR-FTIR, solid-state NMR, as well as N 2 and CO 2 adsorption measurements. The catalytic properties were studied by varying different parameters including amount of catalyst and epoxide, temperature, pressure, and reaction time. Under optimal conditions (100 mg catalyst, 15 mmol epoxide, 2.0 MPa CO 2 pressure, 110 °C and 2 h reaction time) various cyclic carbonates were obtained with high yield and selectivity. MIL-101(Cr)-TSIL catalyst displayed good thermal stability and could be reused after simple separation without a significant decrease in its catalytic activity. Due to synergetic effect of the hydrogen bond from the carboxylic acid group for activation of the C-O bond of the epoxide, adsorption of CO 2 by the imidazolium moiety, and high concentration of CO 2 around the task specific ionic liquid (TSIL), arisen from the mesoporous framework, MIL-101(Cr)-TSIL is a highly effective catalytic system for the solvent-free cycloaddition of CO 2 with epoxide.
AB - A novel heterogeneous catalyst was synthesized by immobilization of a carboxylic acid- and imidazolium-based ionic liquid on the mesoporous MIL-101(Cr) (MIL-101(Cr)-TSIL) and used to convert abundant, nontoxic, economical and renewable CO 2 gas to cyclic carbonates without the need for a cocatalyst or a solvent. The catalyst was characterized in detail by multiple techniques such as XRD, TEM, SEM, EDX, DR-FTIR, solid-state NMR, as well as N 2 and CO 2 adsorption measurements. The catalytic properties were studied by varying different parameters including amount of catalyst and epoxide, temperature, pressure, and reaction time. Under optimal conditions (100 mg catalyst, 15 mmol epoxide, 2.0 MPa CO 2 pressure, 110 °C and 2 h reaction time) various cyclic carbonates were obtained with high yield and selectivity. MIL-101(Cr)-TSIL catalyst displayed good thermal stability and could be reused after simple separation without a significant decrease in its catalytic activity. Due to synergetic effect of the hydrogen bond from the carboxylic acid group for activation of the C-O bond of the epoxide, adsorption of CO 2 by the imidazolium moiety, and high concentration of CO 2 around the task specific ionic liquid (TSIL), arisen from the mesoporous framework, MIL-101(Cr)-TSIL is a highly effective catalytic system for the solvent-free cycloaddition of CO 2 with epoxide.
KW - Cycloaddition of CO with epoxides
KW - MIL-101(Cr)
KW - Solvent-free
KW - Task-specific ionic liquid
UR - http://www.scopus.com/inward/record.url?scp=85062077767&partnerID=8YFLogxK
U2 - 10.1021/acssuschemeng.8b05226
DO - 10.1021/acssuschemeng.8b05226
M3 - Article
AN - SCOPUS:85062077767
VL - 7
SP - 3962
EP - 3973
JO - ACS Sustainable Chemistry & Engineering
JF - ACS Sustainable Chemistry & Engineering
SN - 2168-0485
IS - 4
ER -
