| abstract |
A tridentate mono-anionic ligand having the structure R2X - A - YR - Q - Z where X is P, As or N Y is P, As or N Z is phenolic OH, thiophenol or thiol, each of A and Q is a C1-C4 hydrocarbon bridge, two adjacent C atoms of which may form part of a benzene ring and which may carry at least one C1-C4 alkyl, alkoxy alkyl, alkoxy or tetrahydropyran substituent, R may be the same of different at different places in the molecule, and in each case is selected from C1 to C4 alkyl, alkoxy, alkoxyalkyl and alkoxyalkoxy alkyl. The ligands form cationic complexes with Technetium-99m, having imaging properties. |