Figure 1
Synthesis routes to new surfactants with DO3A-metal complexes as constituents. (a) sulfonic acid terminated bolaform compounds M-DO3A-C4-SO3. (b) thiol terminated bolaform compound M-DO3A-C11-SH. Blue = hydrophilic; red = hydrophobic; purple = predominantly hydrophobic. M3+  = Ce3+(i), Sc3+(ii), Yb3+(iii).
