Patent ID: 8703937

Claim:
A compound of Formula: wherein, T is a metal ion selected from the group consisting of alkali metals, alkaline earth metals, and transition metals bearing (+1) or (+2) charges; R 11 , R 22 and R 33 are independently selected from the group consisting of —CH 2 CO 2 R 5 , —CH 2 ArOR 5 , —CH 2 SR 5 , —CH 2 PO 3 H 2 , CH 2 SO 3 H, —CH 2 Ar(OR 5 ) 2 , —CH 2 Ar(OR 5 )R 6 and —CH 2 Ar(OR 5 ) 2 R 6 ; R 44 is —CH 2 ArOR 7 , —CH(R 5 )CO 2 R 7 , —CH 2 Ar(OR 7 ) 2 , —CH 2 Ar(OR 7 )R 5 , or —CH 2 Ar(OR 7 ) 2 R 3 ; R 5 , R 6 and R 7 are independently H, alkyl or substituted alkyl, R 8 is selected from a group consisting of acyl, optionally substituted aryl and heteroaryl, alkoxy, hydroxy, halo, amino, nitro, thiols, disulfides, carbohydrates, vitamins, and combinations thereof; Ar is an optionally substituted phenyl, pyrimidinyl or pyridinyl; and Y is a counter ion selected from the group consisting of the halides, methanesulfonate, trifluoroacetate, trifluormethanesulfonate and p-toluenesulfonate.