. . "n turn is linked via a group G to the silicon atom; [0139] Q is selected from the group consisting of oxygen, sulfur, and (???NR???); [0140] each R is independently selected from the group consisting of hydrogen; straight, cyclic, or branched alkyl that may or may not contain unsaturation; alkenyl groups; aryl groups; and aralkyl groups, wherein each R, other than hydrogen, comprises from 1 to 18" . .