Metal oxide coatings
View Patent ↗Compounds of formula I may be hydrolyzed to produce metal oxides wherein M is Mg, Al, Ca, Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Ga, Ge, As, Y, Zr, Nb, Mo, Tc, Ru, Rh, Pd, Cd, In, Sn, Sb, La, Hf, Ta, W, Re, Os, Ir, Pt, Hg, Tl, Pb, Bi, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Th, U, or Pu; X is O 1/2 or OR; R is alkyl; R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , and R 7 are independently H, alkoxy, C 1 -C 10 alkyl, phenyl or R 10 , R 11 , R 12 , R 13 , R 14 , and R 15 are independently C 1 -C 10 alkyl or phenyl; n is equal to the value of the oxidation state of M minus q; m and p are independently 0 or an integer from 1 to 5; and q is 0, 1, 2, or 4; with the proviso that when q is 1, X is OR; and when q is 2, X is O 1/2 , and M is V, Cr, Mn, Fe, As, Nb, Mo, Tc, Ru, Sb, Ta, W, Re, Os, Ir, Pt, Bi, Th, U, or Pu; and when q is 4, X is O 1/2 , and M is Cr, Mo, W, Ru, Re, Os, U, or Pu. Articles comprising at least one metal oxide are fabricated by coating a substrate with at least one compounds of formula I before hydrolyzing, and/or heating the compound at a temperature ranging from about 50° C. to about 450° C.
1. A process for fabricating an article comprising at least one metal oxide, said process comprising hydrolyzing at least one compound of formula I
wherein
M is Mg, Al, Ca, Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Ga, Ge, As, Y, Zr, Nb, Mo, Tc, Ru, Rh, Pd, Cd, In, Sn, Sb, La, Hf, Ta, W, Re, Os, Ir, Pt, Hg, TI, Pb, Bi, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Th, U, or Pu;
X is O 1/2 or OR;
R is alkyl;
R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , and R 7 are independently H, C 1 -C 10 alkyl, phenyl or
R 10 , R 11 , R 12 , R 13 , R 14 , and R 15 are independently H, C 1 -C 10 alkyl or phenyl;
n is equal to the the value of the oxidation state of M minus q;
m and p are independently 0 or an integer from 1 to 5; and
q is 0, 1, 2, or 4;
with the proviso that
when q is 1, X is OR; and
when q is 2, X is O 1/2 , and M is Ti, V, Mn, Nb, Mo, Tc, Ru, Sb, Ta, W, Re, Os, Th, or U; and
when q is 4, X is O 1/2 , and M is Cr, Mo, W, Ru, Re, Os, U, or Pu.
2. A process according to claim 1 , wherein the compound of formula I is
3. A process according to claim 1 , wherein the compound of formula I is
4. A process according to claim 1 , wherein the compound of formula I is
5. A process according to claim 1 , wherein the compound of formula I is
6. A process according to claim 1 , wherein the compound of formula I is
7. A process according to claim 1 , wherein a Lewis base is coordinated to M of the compound of formula I.
8. A process according to claim 1 , wherein m and p are 0.
9. A process according to claim 1 , wherein M is Mg, Al, Sc, Ti, V, Zn, Ga, Y, Zr, Mo, Cd, In, Sn, Sb, Ce, Gd, Lu, or W.
10. A process according to claim 1 , wherein M is Al, Ga, Sc, Y, Ti, V, Zn, Cd, In, Sb or Sn.
11. A process according to claim 1 , wherein R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , and R 7 are independently H or methyl.
12. A process according to claim 1 , wherein the compound of formula I is
wherein R 1a , R 3a , R 4a , R 5a , and R 7a are H or methyl.
13. A process according to claim 1 , wherein the compound of formula I is
wherein R 1a , R 3a , R 4a , R 5a , and R 7a are H or methyl.
14. A process according to claim 1 , wherein the compound of formula I is
wherein R 1a , R 3a , R 4a , R 5a , and R 7a are H or methyl.
15. A process according to claim 1 , wherein the compound of formula I is
wherein R 1a , R 3a , R 4a , R 5a , and R 7a are H or methyl.
16. A process according to claim 1 , wherein a plurality of compounds of formula I are hydrolyzed.
17. A process according to claim 16 , wherein the plurality of compounds of formula I is a mixture.
18. A process according to claim 1 , wherein the compound of formula I is Ti(OSi(CH 3 ) 2 OSi(CH 3 ) 3 ) 4 .
19. A process according to claim 1 , wherein the compound of formula I is Al(OSi(CH 3 ) 2 OSi(CH 3 ) 3 ) 3 .
20. A process according to claim 1 , wherein the compound of formula I is VO(OSi(CH 3 ) 2 OSi(CH 3 ) 3 ) 3 .
21. A process according to claim 1 , wherein the compound of formula I is Zn(OSi(CH 3 ) 2 OSi(CH 3 ) 3 ) 2 .
22. A process according to claim 1 , wherein the compound of formula I is Sn(OSi(CH 3 ) 2 OSi(CH 3 ) 3 ) 4 . or In(OSi(CH 3 ) 2 OSi(CH 3 ) 3 ) 3 .
23. A process according to claim 1 , additionally comprising coating a substrate with the compound before hydrolyzing.
24. A process according to claim 1 , wherein hydrolyzing the compound comprises heating the compound at a temperature ranging from about 100° C. to about 200° C.
25. An article produced by the process of claim 1 .