Fluorocarbon　groups　were　used　to　modify　the　pore　channels　of　ethane-bridged　periodic　mesoporous　organosilica　by　the　co-condensation　of　1,2-Bis(triethoxysilyl)ethane　(BTESE)　and　trifluoropropyltrimethoxysilane　(TFPTMS)　in　the　presence　of　Poly(ethylene　glycol)-B-Poly(propylene　glycol)-B-Poly(ethylene　glycol)　(P123)　surfactants　under　acidic　conditions.　The　functionalized　materials　were　investigated　in　detail　by　means　of　XRD,　TEM,　FT-IR,　solid-state　NMR,　and　N-2　adsorption.　The　effect　of　fluorocarbon　groups　concentration　on　the　mesoscopic　order　and　pore　structure　of　the　functionalized　materials　was　also　studied.　The　results　show　that　bridging　groups　in　the　framework　do　not　cleave　and　fluorocarbon　groups　are　attached　covalently　to　the　pore　wall　of　periodic　mesoporous　organosilica　after　functionalization.　The　samples　functionalized　with　20%　TFPTMS　remain　desired　mesoporous　architecture,　with　a　narrow　pore　size　distribution　centered　at　4.1　nm,　a　large　surface　of　834　m(2)/g　and　a　pore　volume　of　0.91　cm(3)　g(-1),　without　pronounced　change　compared　to　the　pure　periodic　mesoporous　organosilica.　Unfortunately　the　functionalized　materials　become　structurally　disordered　with　increasing　amount　of　fluorocarbon　groups.