. . . . . "Generally, suitable attachment moieties include, but are not limited to, carboxylic acids, carboxylic esters, alcohols, thiols (including S-acetylthiols) selenol, tellurol, phosphonic acids, phosphonothioate, amines, amides, trimethylsilylarenes, nitrile, aryl and alkyl groups, including substituted aryl and alkyl groups such as iodoaryls and bromomethyls." . . .