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

Ferrer Íngrid | Zendy; Fontrodona Xavier | Zendy; Roig Anna | Zendy; Rodríguez Montserrat | Zendy; Romero Isabel | Zendy

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

Author(s) -

Ferrer Íngrid,

Fontrodona Xavier,

Roig Anna,

Rodríguez Montserrat,

Romero Isabel

Publication year - 2017

Publication title -

chemistry – a european journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.687

H-Index - 242

eISSN - 1521-3765

pISSN - 0947-6539

DOI - 10.1002/chem.201604463

Subject(s) - denticity , catalysis , cyclic voltammetry , mesoporous silica , ligand (biochemistry) , redox , chemistry , ruthenium , olefin fiber , mesoporous material , differential pulse voltammetry , heterogeneous catalysis , inorganic chemistry , nuclear chemistry , polymer chemistry , materials science , combinatorial chemistry , electrochemistry , metal , organic chemistry , electrode , biochemistry , receptor

The preparation and characterization of complexes with a phosphonated terpyridine (trpy) ligand (trpy‐P‐Et) and a bidentate pyridylpyrazole (pypz‐Me) ligand, with formula [Ru II (trpy‐P‐Et)(pypz‐Me)X] n + ( 2 : X=Cl, n =1; 3 : X=H 2 O, 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 Ru IV/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.

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