Abstract Twelve heteroaromatic complexing agents 9a–I were synthesized with the purpose to develop suitable labels for time-resolved luminescence-based bioaffinity assays. The relative luminescence yields, excitation maxima, and emission decay constants of their europium (III) and terbium (III) chelates were determined. According to these results, 2, 2′, 2 ″, 2‴-[(2, 2′-bipyridine-6, 6′-diyl) bis (methylenenitrilo)] tetrakis (acetic acid)(9e) and ...
