| 摘要 |
<p>A spectrofluorometric method for the detection of target structures by the use of two or more fluorescent lanthanide chelate probes for specifically marking each of said structures. The probes used differ with respect to their excitation or emission wavelength maxima. Also disclosed are certain lanthanide chelates that can be used in the method, either for synthesizing the probes or to be used directly as probes. The chelating ligand of these novel probes comprises two heterocyclic rings (preferably pyridyl) linked together so that jointly they can coordinate (chelate) one metal ion. The bridge linking the two rings together permits electron delocalization between the rings. Attached to their 6-positions the two rings carry chelating groups having heteroatoms (N, O or S) that participate in the chelation of the metal ion. Preferably the chelating groups at the 6-positions are -CH2N(CH2COOH)2, -CH2N(CH2CH2COOH)2, (a) or (b).</p> |
