Synthesis and Luminescence of Novel EuIII Complexing Agents and Labels with 4‐(Phenylethynyl)pyridine Subunits

Abstract
The synthesis of novel 4‐(phenylethynyl)pyridine subunits containing H2O‐soluble complexing agents and their luminescence with EuIII ions are reported. Ligands with high luminescence intensities as well as quantum yields were obtained. Also the prepared labeling reagents as antibody conjugates gave the highest quantum and luminescence yields reported for H2O‐soluble EuIII labels.