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Chemical modification of a silica surface with chromium acetylacetonate (Cr(acac) 3 , acac = C 5 H 7 O 2 ) was carried out from the gas phase at 190°C. This results in the formation of chromium acac species which interact with the silica surface because of hydrogen bonding between the surface hydroxyl groups and the quasi π-electron system of two acac ligands of Cr(acac)...
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