Abstract
Palladium nanospheres of 2.4 and 3.8 nm diameter and nanocubes of 18 nm rib length were used to catalyze a fluorometric Tsuji–Trost reaction for the transformation of a phenyl allyl ether to a fluorescent phenol in the presence of triphenylphosphine, which was pivotal to the catalytic activity. Turnover frequencies calculated per defect atoms were found similar for all nanoparticles, indicating that these atoms are the active sites. However, kinetic studies combined with Pd leaching and transmission electron microscopy analyses in the presence of various reaction components showed Pd leaching via oxidative addition of a reactant, followed by nanoparticle growth depending on the PPh 3 concentration. The formation of largest particles was found for the fastest reaction with PPh 3/Pd molar ratio of 4, in the range from 0 to 9. This study shows the validity of the atomic dissolution mechanism in the reaction of interest.
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.
