Work

Activating Ru nanoparticles on oxide supports for ring-opening metathesis polymerization

Year: 2018

Type: article

Abstract: Nano-sized particles mounted on heterogeneous oxide supports such as silica have altered reactivity when compared to their homogeneous analogs. In particular, catalyzed olefin metathesis using supported Ru nanoparticles has shown great promise and various methods have been employed to develop functional heterogeneous Ru catalysts. This article reports a method for synthesizing Ru nanoparticles supported on silica and titania. The nanoparticles were characterized using XPS showing Ru(0) dominates when not exposed to air. TEM showed Ru nanoparticle sizes of 3.1 ± 0.8 nm for Ru supported on SiO2 and 5.6 ± 1.3 nm for Ru supported on TiO2. The materials demonstrated modest activity in ring-opening metathesis reactions via diazo activation and nanoparticle-embedded polymers of norbornene and norbornadiene were synthesized using dry box and Schlenk line techniques. The Ru/support/polymer composite materials were characterized using proton NMR, XPS, and SEM/EDS.

Source: Dalton Transactions

DOI: 10.1039/c8dt00354h

Authors: Alex J. Mantanona, Katelyn Wood, Yann Schrodi, Simon J. Garrett

Institution: California State University, Northridge

Language: English

Topic: Synthetic Organic Chemistry Methods

Subfield: Organic Chemistry

Field: Chemistry

Domain: Physical Sciences

Open Access status: green

Funder: National Center for Research Resources

Award: High-End CryoEM Instrument for the UCLA Electron Imaging Center for Nanomachines