| abstract |
Fluorinated phosphonium salts are linked to a diazirine moiety. A carbene precursor was photochemically generated from the diazirine to covalently attach the salt to substrates e.g., cotton and paper. Surface-coated substrates were found to have anti-wetting properties e.g., water contact angles of over 130° and 20° for cotton and paper, respectively. The covalent attachment was by photochemical activation, so the grafting method permits photo-patterning of the coating. |