Patent ID: 8258255

Claim:
A composition, comprising: a phosphorus-containing compound represented by the following formula: wherein, independently for each occurrence: Q represents —O or —N(R3); r represents 0 or 1, and s represents 3 or 2, such that r+s=3; R1 is represented by: wherein * represents the central phosphorus atom of Formula I; R2 represents a polymeric chain that differs from R1 and does not interfere with the biocompatability of the compound; R3 represents —H, alkyl, aryl, cycloalkyl, cycloalkenyl, heterocycle, or polycycle; R7 represents —O-alkyl, —O-cycloalkyl, —O-aryl, —O-heterocyclyl, —S-alkyl, —S-cycloalkyl, —S-aryl, —S-heterocyclyl, or —N(R4)R5; R4 and R5, each independently, represent a hydrogen, an alkyl, an alkenyl, —(CH 2 )m-R6, or R4 and R5, taken together with the N atom to which they are attached complete a heterocycle having from 4 to about 8 atoms in the ring structure; m represents an integer from 0-10; R6 represents —H, alkyl, cycloakyl, —O-alkyl, —O-cycloalkyl, cycloalkenyl, —O-cycloalkenyl, aryl, —O-aryl, heterocycle, —O-heterocycle, polycycle or —O-polycycle; Q1, Q2 . . . Qs, each independently, represent —O or —N(R3); X1, X2 . . . Xs, each independently, represent —O —or —N(R3)—; t s is a constitutional unit of the polymeric chain; the s of t s is an integer and at least 1; n 1 , n 2 . . . n 3 is greater than 0 to about 1000; x is an integer from 1 to about 1000; and M1, M2 . . . Ms each independently represent an aliphatic or aryl group.