| abstract |
A surface functionalized nanoparticle a covalently attached radical of formula I ** Formula ** in which the nanoparticle is a SiO2 nanoparticle, X is oxygen, sulfur or ** Formula ** R1 is a photoinitiator R2 and R3 are -OR5 , R4 is hydrogen, C1-C25 alkyl or C3-C25 alkyl which is interrupted by oxygen or sulfur, R5 is the surface of the nanoparticle, and n is 1, 2, 3, 4, 5, 6, 7 or 8, comprising the further functionalized nanoparticle a covalently linked radical of formula II ** Formula ** wherein R11 is C1-C25 alkyl, C3-C25 alkyl which is interrupted by oxygen, sulfur or ** Formula ** C2-C24 alkyl substituted with amino, mercapto or hydroxyl; C2-C24 alkyl substituted with amino, mercapto or hydroxyl which is interrupted by oxygen, sulfur or ** Formula ** C2-C24 alkenyl, C5-C12 cycloalkyl, C5-C12 cycloalkenyl, a polymerizable group or a polymer, R12 and R13 are -OR15, R14 is hydrogen, C1-C25 alkyl or C3-C25 alkyl which is interrupted by oxygen or sulfur; and R15 is the surface of the nanoparticle. |