The present invention relates to a novel compound of formula I, wherein the conventional sign are defined in the claim 1, R1 and R2 are silicon-containing group independent from each other. The novel compound of formula I can be used as the surface energy reducer of the organic material, and the organic material is polycarbonate, polyester or polyketone or their mixture, blending material or mixing material. The polymer which has reduced surface energy has the advantages of ''easy cleaning'', ''self cleaning'', ''antifouling property'', ''decontamination'', ''applying and writing resistance'', ''oil resistance'', ''solvent resistance'', ''chemical environment resistance'', ''self lubricating'', ''scratch resistance'', ''low-moisture absorption'', ''fouling resistance'', ''lubricating property'' and ''hydrophobic surface''; and adhesion resistance to protein and microorganism such as bacteria, true fungus and algae.