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Turning over on sticky balls: preparation and catalytic studies of surface-functionalized TiO2 nanoparticles

Freimann, Sven A. and Prescimone, Alessandro and Housecroft, Catherine E. and Constable, Edwin C.. (2021) Turning over on sticky balls: preparation and catalytic studies of surface-functionalized TiO2 nanoparticles. RSC Advances, 11 (10). pp. 5537-5547.

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Official URL: https://edoc.unibas.ch/81395/

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Abstract

We have investigated the reactivity of rhodium(III) complex-functionalized TiO2 nanoparticles and demonstrate a proof-of-principle study of their catalytic activity in an alcohol oxidation carried out under aqueous conditions water in air. TiO2 nanoparticles (NPs) have been treated with (4-([2,20:60,200- terpyridin]-40-yl)phenyl)phosphonic acid, 1, to give the functionalized NPs (1)@TiO2. Reaction between (1) @TiO2 NPs and either RhCl3$3H2O or [Rh2(m-OAc)4(H2O)2] produced the rhodium(III) complexfunctionalized NPs Rh(1)2@TiO2. The functionalized NPs were characterized using thermogravimetric analysis (TGA), matrix-assisted laser desorption ionization (MALDI) mass spectrometry, 1H NMR and FT-IR spectroscopies; the single crystal structures of [Rh(1)2][NO3]3$1.25[H3O][NO3]$2.75H2O and of a phosphonate ester derivative were determined. 1H NMR spectroscopy was used to follow the reaction kinetics and to assess the recyclability of the NP-supported catalyst. The catalytic activity of the Rh(1)2@TiO2 NPs was compared to that of a homogeneous system containing [Rh(1)2]3+, confirming that no catalytic activity was lost upon surface-binding. Rh(1)2@TiO2 NPs were able to withstand reaction temperatures of up to 100 C for 24 days without degradation.
Faculties and Departments:05 Faculty of Science > Departement Chemie > Chemie > Anorganische Chemie (Constable)
05 Faculty of Science > Departement Chemie > Chemie > Anorganische Chemie (Housecroft)
UniBasel Contributors:Housecroft, Catherine Elizabeth and Prescimone, Alessandro and Constable, Edwin Charles and Freimann, Sven
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:Royal Society of Chemistry
e-ISSN:2046-2069
Note:Publication type according to Uni Basel Research Database: Journal article
Language:English
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Last Modified:10 Feb 2021 09:31
Deposited On:10 Feb 2021 09:31

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