| 摘要 |
The present invention provides a Molybdenum or Tungsten chalcogenide nanoobject having: (a) an object size comprised from 0.1 to 500 nm, and (b) from 1 to 99% by weight of molecules of formula (I) with respect to the total weight of the nanoobject, wherein: A is -OH; X is selected from: (CrC2o)alkyl optionally substituted with one or more radicals; a 2 to 20-member heteroalkyi optionally substituted with one or more radicals; and a homopolymer or copolymer comprising a polymeric chain; B is selected from: H, -OH, NH2, (Ci-C4)alkyl, halogen, phenyl substituted with one or more halogen radicals, benzyl substituted with one or more halogen radicals, -C(=O)R3, -C(=O)(R7), -OC(=O)(O)R3, -C(=O)(O ), -C(=O)(O)R3, -OR3, -CH(OR3)(OR4), -C(OR3)(OR4)(R5), -C(OR3)(OR4)(OR5), -C(OR3)(OR4)(OR5)( OR6), -NR1,-NR2R3,, -C(=NR1)(R2), -C(=O)(NR1R2), -Ν(Ο(=Ο)(^)) (C(=O)(R2))(R3), -O(CN), -NC(=O), -ONO2, -CN, -NC, -ON(=O), -NO2, -NO, -C5H4N, -SR1, -SSR1,-S)(R1), - S(R1), -S(=O)(OH), -S(=O)(=O)(OH), -SCN, -NCS, -C(=S)(R1), -PR1R2, -P(=O)(OH)2, -OP(=O)(OH)2, -OP(=O)(OR1)(OR2), -B(OH), -B(OR1)(OR2), and -B(OR1)(R2); provided that when B is -H or (C1-C4) alkyl, then X is a homopolymer, a copolymer, or a 2 to 20-member heteroalkyl optionally substituted with one or more radicals as defined above. The present invention also provides processes for the preparation of the nanoobjects, their use as additive for reducing the friction coefficient of a material, and compositions comprising thereof. A-X-B (I) |
