Abstract: A compound having Formula I wherein one of R1 and R2 is a group of the formula wherein R4 is selected from H and hydrocarbyl, R5 is a hydrocarbyl group and L is an optional linker group, or R1 and R2 together form a ring substituted with the group wherein R3 is H or a substituent, and wherein X is selected from S, O, NR6 and C(R7)(R8), wherein R6 is selected from H and hydrocarbyl groups, wherein each of R7 and R8 are independently selected from H and hydrocarbyl groups.

Abstract: A compound having Formula I wherein one of R1 and R2 is a group of the formula wherein R4 is selected from H and hydrocarbyl, R5 is a hydrocarbyl group and L is an optional linker group, or R1 and R2 together form a ring substituted with the group wherein R3 is H or a substituent, and wherein X is selected from S, O, NR6 and C(R7)(R8), wherein R6 is selected from H and hydrocarbyl groups, wherein each of R7 and R8 are independently selected from H and hydrocarbyl groups.

Abstract: A compound having Formula I wherein one of R1 and R2 is a group of the formula wherein R4 is selected from H and hydrocarbyl, R5 is a hydrocarbyl group and L is an optional linker group, or R1 and R2 together form a ring substituted with the group wherein R3 is H or a substituent, and wherein X is selected from S, O, NR6 and C(R7)(R8), wherein R6 is selected from H and hydrocarbyl groups, wherein each of R7 and R8 are independently selected from H and hydrocarbyl groups.

Abstract: A compound having Formula I wherein one of R1 and R2 is a group of the formula wherein R4 is selected from H and hydrocarbyl, R5 is a hydrocarbyl group and L is an optional linker group, or R1 and R2 together form a ring substituted with the group wherein R3 is H or a substituent, and wherein X is selected from S, O, NR6 and C(R7)(R8), wherein R6 is selected from H and hydrocarbyl groups, wherein each of R7 and R8 are independently selected from H and hydrocarbyl groups.

Abstract: A compound having Formula I R1—Z—R2Formula I wherein R1 is an optionally substituted phenyl ring; R2 is or comprises an optionally substituted aromatic ring; and Z is —X—Y—L— or —Y—X—L— wherein either X is selected from —S(?O)(?O)— and —C(?O)—; and Y is —NR3—; or X is selected from —S(?O)(?O)— and —S—, and Y is —C(R4)(R5)—; L is an optional linker; and R3, R4 and R5 are each independently selected from H and hydrocarbyl; and wherein when R2 comprises the following structural moiety wherein Q is an atom selected from the group consisting of S, O, N and C; the compound is selected from compounds of the formulae R1—C(?O)—NR3—L—R2; R1—S(?O)(?O)—C(R4)(R5)—L—R2; R1—S—C(R4)(R5)—L—R2; R1—NR3—S(?O)(?O)—L—R2; R1—NR3—C(?O)—L—R2; R1—C(R4)(R5)—S(?O)(?O)—L—R2; and R1—C(R4)(R5)—S—L—R2.

Abstract: A compound having Formula I R1-Z-R2??Formula I wherein R1 is an optionally substituted phenyl ring; R2 is or comprises an optionally substituted-aromatic ring; and Z is -X-Y-L- or -Y-X-L- wherein either X is selected from —S(?O)(?O)— and —C(?O)—, and Y is —NR3—; or X is selected from —S(?O)(?O)— and —S—, and Y is —C(R4)(R5)—; L is an optional linker; and R3, R4 and R5 are each independently selected from H and hydrocarbyl; and wherein when R2 comprises the following structural moiety wherein Q is an atom selected from the group consisting of S, O, N and C; the compound is selected from compounds of the formulae R1C(?O)—NR3-L-R2; R1—S(?O)(?O)—C(R4)(R5)-L-R2; R1—S—C(R4)(R5)-L-R2; R1—NR3—S(?O)(?O)-L-R2; R1—NR3—C(?O)-L-R2; R1—C(R4)(R5)—S(?O)(?O)-L-R2; and R1—C(R4)(R5)—S-L-R2.

Abstract: A compound having Formula I 1