Abstract
Described here is the first application of plasma-enhanced chemical vapor deposition (PE-CVD) to the synthesis of catalytically active materials, prepared by covering Merrifield resin beads with an oxygen-containing fluorocarbon thin film deposited in a hexafluoropropene-O2 plasma. Such modified resins catalyze both the selective epoxidation of trans-β-methylstyrene and its double oxidative cleavage to benzaldeyde in organic–water biphasic media at room temperature, using potassium monoperoxysulfate (KHSO5) as the terminal oxidant. Interestingly, the epoxide/benzaldehyde product ratio strictly depends on the conditions adopted for catalyst generation. This, coupled with evidence for the presence of carbonyl groups on the surface of treated resins, point to dioxirane and singlet oxygen (1O2)-mediated oxidations; 1O2 being produced in the decomposition of KHSO5. Compared to traditional synthetic procedures to obtain similar catalytic active materials, the application of PE-CVD is eco-sustainable and less expensive. Also, the activity of catalysts can be fully restored upon iterative re-treatment of the exhausted resin.
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.
