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Heterogeneous Removal of Water-Soluble Ruthenium Olefin Metathesis Catalyst from Aqueous Media Via Host-Guest Interaction
Published on: August 23, 2018
Wheel-Like Icosanuclear Peroxotitanate-A Stable Water-Soluble Catalyst for Oxygen Transfer Reactions
Wan-Ting Jin1, Fang Yang1, Lan Deng1
1State Key Laboratory of Physical Chemistry of Solid Surfaces, Green Chemical Productions of Alcohols-Ethers-Esters, College of Chemistry and Chemical Engineering , Xiamen University , Xiamen , 361005 , China.
Abstract:
Water-soluble wheel-like icosanuclear peroxotitanate K16[Ti20(μ-O)8(HO2)8(O2)12( R, R-tart)12]·52H2O (1) chelated by tartrate has been successfully isolated. As the largest peroxotitanate reported, {Ti20} features 20 (hydro)peroxo groups with three kinds of coordination modes in μ-η1:η2, μ-η2:η2, and η2 fashions. The cluster is stable in solution and solid states. It has been tested for the catalytic oxidations of methyl phenyl sulfide and pyridine with hydrogen peroxide, respectively, which shows reversible elimination and the addition of peroxo groups. This provides a rare example of well-characterized titanium peroxide for homogeneous catalysis and mechanism research.
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