Linkers are critical in many fields of chemistry, where a soluble species has to be attached to a solid, or generally, where the surface has to be modified in a controlled manner. Thus, the interest in suitable linkers spans the broad range from combinatorial chemistry and solid-phase synthesis 1 over chromatography and silica modification 2 to immobilized catalysts. 3,4 For attaching phosphine linkers to oxidic surfaces, ethoxysilane groups are most favorable, and many dppe- and ...