申请人:Hoffmann-La Roche Inc.
公开号:US04745076A1
公开(公告)日:1988-05-17
The invention relates to a ruthenium complex having the formula Ru.sup.2+ L.sub.1 L.sub.2 L.sub.3 I wherein L.sub.1, L.sub.2 and L.sub.3 are the same or different are equal to a bi- or polycyclic ligand with at least two nitrogen-containing heterocycles, whereby at least one of these ligands is substituted with at least one group conferring water-solubility, and whereby at least one of these ligands is substituted, optionally via a spacer group, with at least one reactive group, and whereby the ligands L.sub.1, L.sub.2 and L.sub.3 are attached to the ruthenium via nitrogen atoms. The invention is further related to such ruthenium complexes having coupled thereto an immunologically active material, for example, antigens, haptens or antibodies and to the use of said ruthenium complexes in fluorescence spectroscopy. Specific ligands L.sub.1, L.sub.2 and L.sub.3 which are useful in the ruthenium complexes of the invention are, e.g., 2,2'-bipyridine, 1,10-phenanthroline benzbathophenanthroline or bathophenanthroline groups. Groups which are useful for conferring water-solubility on said ligand are, e.g. sulfonic acid groups which are preferably present in the form of their salts. Useful spacer groups are e.g. an alkylene groupcontaining 1-8 carbon atoms and which is optionally substituted with --SO.sub.2 --NH--, --S--, --O--, --COO-- or --CO--NH-- groups. Useful reactive groups to which the immunologically active material is coupled, are e.g. --COOH, --I, --NH.sub.2, --NCS or --SO.sub.2 Hal groups. The ruthenium complexes according to the present invention can be detected with great sensitivity by fluorescence spectroscopy and are thus useful in fluorescense immunoassays.
该发明涉及具有Ru.sup.2+ L.sub.1 L.sub.2 L.sub.3 I公式的钌配合物,其中L.sub.1、L.sub.2和L.sub.3相同或不同且等于至少具有两个含氮杂环的双或多环配体,其中至少一个这些配体被至少一个赋予水溶性的基团取代,其中至少一个这些配体被取代,可通过一个间隔基团,带有至少一个反应性基团,其中配体L.sub.1、L.sub.2和L.sub.3通过氮原子连接到钌上。该发明还涉及具有与之偶联的免疫活性物质(例如抗原、半抗原或抗体)的这种钌配合物,并且涉及在荧光光谱学中使用所述钌配合物。本发明中有用的特定配体L.sub.1、L.sub.2和L.sub.3包括2,2'-联吡啶、1,10-邻菲啰啉、苯基邻菲啰啉或邻苯基邻菲啰啉基团。用于赋予该配体水溶性的基团包括磺酸基团,最好以它们的盐形式存在。有用的间隔基团例如含有1-8个碳原子的烷基基团,可选择地取代为--SO.sub.2--NH--、--S--、--O--、--COO--或--CO--NH--基团。用于偶联免疫活性物质的有用反应性基团包括--COOH、--I、--NH.sub.2、--NCS或--SO.sub.2 Hal基团。根据本发明的钌配合物可以通过荧光光谱学以极高的灵敏度检测,并且因此在荧光免疫分析中是有用的。