The nanoporous chromium carboxylate MIL-101 with coordinatively unsaturated chromium sites has been shown to be active in the sulfoxidation of aryl sulfides with H2O2 to selectively produce the corresponding sulfoxides. Interestingly, the electron-releasing groups in the oxygenation reaction of para-X-phenylmethyl sulfoxides (X-Ph-S-CH3, X = CH3, H, NO2, and CN) enhanced the oxidation reactivity in 1:1 mixtures of X-Ph-S-CH3:H-Ph-S-CH3. Moreover, the 18O-labeled experiments to understand the source of oxygen in sulfoxide products proved that the oxygen atom in the sulfoxide product was entirely derived from H2O2.
Bibliographical noteFunding Information:
This work was supported by the Korea Research Council for Industrial Science & Technology (ISTK) through the Institutional Research Program, and by partially the SRC/ERC program of MOST/KOSEF (R11-2005-0008-00000-0 to JK) and Seoul R&BD Program (10816 to JK). The French partners are grateful to CNRS for the financial support. M.Y. is grateful for the BK 21 fellowship. The authors thank Prof. Marco Daturi and Dr. Alexandre Vimont for their IR measurements.
- Coordinatively unsaturated metal site (CUS)
- Metal-organic frameworks (MOFs)