NEW HETEROAROMATIC COMPLEXING AGENTS AND LUMINESCENCE OF THEIR EUROPIUM(III) AND TERBIUM(III) CHELATES

Twelve heteroaromatic complexing agents 9a-l 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 2,2',2'',2'''-[(2,2':6',2''-terpyridine-6,6''-diyl)bis(methylenenitrilo)]tetrakis(acetic acid) (9l) are the most promising agents.