首页|SBA-15 supported pyrazolium ionic liquid efficient fixation of carbon dioxide into cyclic carbonate under mild conditions: The synergistic contribution of SBA-15 and pyrazolium ionic liquid
SBA-15 supported pyrazolium ionic liquid efficient fixation of carbon dioxide into cyclic carbonate under mild conditions: The synergistic contribution of SBA-15 and pyrazolium ionic liquid
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NSTL
Elsevier
Immobilized ionic liquids are one of the most popular catalysts for the cycloaddition of carbon dioxide (CO2) and epoxides with some distinguished advantages. However, the harsh reaction condition, especially for the high reaction pressure, is still the obstacle for its large-scale application. A series of amino-functionalized pyrazolium ionic liquids are grafted on SBA-15 in this work. Among them, SBA-15-APMPzBr(20) exhibits the best catalytic activity achieving 97.6% product yield under 0.5 MPa CO2 pressure at 100 C by using 100 mg SBA-15-APMPzBr (20) for 10 h. No solvent is added in the catalytic system. Moreover, SBA-15-APMPzBr(20) exhibits the good recyclability and generality. Its excellent catalytic performance is attributed to the contribution from both immobilized ionic liquids and the SBA-15 supporter. Besides the mesoporous feature, the hydroxyl groups in SBA-15 promote the ring-opening of substrate, which is testified by the experimental measurements and density functional theory calculations.
NSTL
Elsevier
