Abstract
Type MCM-41 hybrid silicas that contain cationic surfactants in their mesopores possess very strong basic sites, siloxy site (SiO−), which are able to promote transesterification reactions. However, the low catalytic stability of these materials hinders their reuse in successive cycles. This work investigates the stability of MCM-41 hybrid silicas synthesized using the polymerizable surfactant 1-cetyl-3-vinylimidazolium bromide (CVIMBr). The surfactant was synthesized by the quaternization reaction between 1-vinylimidazole and 1-bromohexadecane. The CVIM-MCM-41 hybrid silicas were synthesized, polymerized using ultraviolet irradiation, and evaluated in catalysis of the model transesterification reaction of ethyl acetate with methanol. The characterization results confirmed formation of the CVIMBr surfactant. The CVIM-MCM-41 hybrid silicas showed lower catalytic activity than the CTA-MCM-41 hybrid silica, but had greater catalytic stability in up to 5 successive uses.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
