Patent ID: 8742175

Claim:
A compound is selected from the following formula (I), formula (II) and formula (III): wherein R 1 is selected from R 2 , R 3 , and R 4 are independently selected from C 1 -C 12 alkyl which may be branched or unbranched, may or may not contain ring structures, or independently selected from C 6 -C 12 aryl ring which may be substituted or unsubstituted, which may be independently interrupted by one to four groups selected from O, N, Si, S, C(O), C(S), OC(O), OC(O)O, SC(O), SC(S), C(O)NH, C(O)NR x , OP(O), OSiR x R y O, or carbon-carbon double or triple bond; R 5 is hydrogen, R x , Si(R x ) 2 (R y ), or Si(R x ) 3 ; R 6 , R 7 , and R 8 are independently selected from hydrogen or R x , wherein R x or R y has the similar structure with that of R 2 , R 3 , or R 4 ; n is an integer from 1 to 6; X is O, S, N, NH, or NR x ; A is a n-valent linkage, A-X is OH, OR x , SR x , NHR x , N(R x ) 2 , or quaternary ammonium cation selected from (R x ) 3 N + or (R x ) 2 R y N + , when n is 1; A-X is N, NR x , or quaternary ammonium cation selected from R x N + , R x R y N + , or (R x ) 2 N + , when n is 2, 3, 4, 5, or 6; or A-X—(H) n represents a n-functional alcohol, thiol, phenol, carboxylic acid, or amine, respectively.