Abstract
Abstract A new fourth-generation poly(propylene imine) dendrimer (G4-M) containing 32 triolefinic 15-membered macrocycles on the surfaces has been synthesized. The bimetallic RuRh-dendrimer-stabilized nanoparticles (DSNs) were first prepared within G4-M by a co-complexation route. The new G4-M dendrimer has been characterized by 1H nuclear magnetic resonance, infrared radiation, and elemental analysis. The dendrimer-stabilized bimetallic ions and reduction courses were analyzed by UV-vis spectroscopy. High-resolution transmission electron microscopy and energy dispersive spectrometer were used to characterize the bimetallic nanoparticle size, size distribution, and particle morphology. The RuRh bimetallic DSNs showed high catalytic activity for the hydrogenation of nitrile-butadiene rubber.
Highlights
In recent years, bimetallic nanoparticles has attracted a great deal of attention among scientists due to their applications in numerous catalytic reactions, including catalytic reforming reactions, hydrogenation, pollution control, and alcohol oxidation [1,2]
The UVvis data indicated the interaction between the metallic ions (Ru3+, Rh3+) and the tertiary amine groups of G4-M dendrimer [16]
The presence of metallic ions (Ru3+, Rh3+) coordinated to the endocyclic olefins of macrocycle can be deduced from the 1H nuclear magnetic resonance (1HNMR) spectra [17]
Summary
Bimetallic nanoparticles has attracted a great deal of attention among scientists due to their applications in numerous catalytic reactions, including catalytic reforming reactions, hydrogenation, pollution control, and alcohol oxidation [1,2]. The dendrimer surface stabilized metal nanoparticle catalyst (DSNs) can be obtained when connecting the catalytic active centers to the surface of the end-functional dendrimer [7]. Using new dendrimers with triolefinic 15-membered macrocycles at the end of the dendron as stabilizers for preparing metallic nanoparticles provides the advantage of minimal surface deactivation for catalytic applications.
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