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A Recoverable Ruthenium Aqua Complex Supported on Silica Particles: An Efficient Epoxidation Catalyst

The preparation and characterization of complexes with a phosphonated terpyridine (trpy) ligand (trpy-P-Et) and a bidentate pyridylpyrazole (pypz-Me) ligand, with formula [RuII(trpy-P-Et)(pypz-Me)X]n+ (2: X=Cl, n=1; 3: X=H2O, n=2), is described, together with the anchoring of 3 on two types of supports: mesoporous silica particles (SP) and silica-coated magnetic particles (MSP). Aqua complex 3 is easily obtained by heating 2 in refluxing water and exhibits a two-electron RuIV/II redox process. It was anchored on SP and MSP supports by two different synthetic strategies, yielding the heterogeneous systems SP@3 and MSP@3, which were fully characterized by IR and UV/Vis spectroscopy, SEM, cyclic voltammetry, and differential pulse voltammetry. Catalytic olefin epoxidation was tested with molecular complex 3 and its SP@3 and MSP@3 heterogeneous counterparts, including reuse of the heterogeneous systems. The MSP@3 material can be easily recovered by a magnet, which facilitates its reusability

This research has been financed by AGAUR (Generalitat de Catalunya, projects 2014-SGR-149 and 2014-SGR-213), by MINECO (project CTQ2015-66143-P), and by Universitat de Girona (project MPCUdG2016/048).

© Chemistry - A European Journal, 2017, vol. 23, núm. 17, p. 4096-4107

Wiley

Manager: Ministerio de Economía y Competitividad (Espanya)
Author: Ferrer Vall-llosada, Íngrid
Fontrodona, Xavier
Roig, Anna
Rodríguez Pizarro, Montserrat
Romero García, Isabel
Date: 2017 March 23
Abstract: The preparation and characterization of complexes with a phosphonated terpyridine (trpy) ligand (trpy-P-Et) and a bidentate pyridylpyrazole (pypz-Me) ligand, with formula [RuII(trpy-P-Et)(pypz-Me)X]n+ (2: X=Cl, n=1; 3: X=H2O, n=2), is described, together with the anchoring of 3 on two types of supports: mesoporous silica particles (SP) and silica-coated magnetic particles (MSP). Aqua complex 3 is easily obtained by heating 2 in refluxing water and exhibits a two-electron RuIV/II redox process. It was anchored on SP and MSP supports by two different synthetic strategies, yielding the heterogeneous systems SP@3 and MSP@3, which were fully characterized by IR and UV/Vis spectroscopy, SEM, cyclic voltammetry, and differential pulse voltammetry. Catalytic olefin epoxidation was tested with molecular complex 3 and its SP@3 and MSP@3 heterogeneous counterparts, including reuse of the heterogeneous systems. The MSP@3 material can be easily recovered by a magnet, which facilitates its reusability
This research has been financed by AGAUR (Generalitat de Catalunya, projects 2014-SGR-149 and 2014-SGR-213), by MINECO (project CTQ2015-66143-P), and by Universitat de Girona (project MPCUdG2016/048).
Format: application/pdf
Citation: 026240
ISSN: 0947-6539 (versió paper)
1521-3765 (versió electrònica)
Document access: http://hdl.handle.net/10256/14111
Language: eng
Publisher: Wiley
Collection: MINECO/PE 2016-2018/CTQ2015-66143-P
Reproducció digital del document publicat a: http://dx.doi.org/10.1002/chem.201604463
Articles publicats (D-Q)
Is part of: © Chemistry - A European Journal, 2017, vol. 23, núm. 17, p. 4096-4107
Rights: Tots els drets reservats
Subject: Ruteni -- Compostos
Ruthenium compounds
Epòxids
Epoxy compounds
Catàlisi heterogènia
Heterogeneous catalysis
Title: A Recoverable Ruthenium Aqua Complex Supported on Silica Particles: An Efficient Epoxidation Catalyst
Type: info:eu-repo/semantics/article
Repository: DUGiDocs

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