Inorganic Chemistry, Vol.42, No.14, 4401-4408, 2003
Synthesis and luminescence studies of aryl substituted tetraamide complexes of europium(III): A new approach to pH responsive luminescent europium probes
DOTA-tetraamide ligands having extended phenol or pyridine substituents have been synthesized. The D-5(0) --> F-7(J) DeltaJ = 1 and 2 emission bands in the corresponding europium(Ill) complexes differ in their sensitivity to solution pH. This offers the potential for developing pH responsive probes for in vivo imaging that are independent of probe concentration.