The invention concerns sterically shielded, stabilized fluorescent dyes based on symmetrical or unsymmetrical 3-spirocyanines and their utilization as marker-molecules in analytical procedures. The fluorescent dyes according to the invention are characterized by a strongly reduced proneness towards aggregation due to the insertion of bulky spiro-substituents and thus enable to reach a high degree of coupling to the target molecule without a significant loss of fluorescence due to self quenching effects. They therefor exhibit a high quantum yield and are thus excellently suitable as fluorescent dyes, especially as NIR-fluorescent dyes, for the coupling or binding to biological and non-biological target molecules used in analytical methods. The analytical methods comprise all methods in which fluorescence-optical methods are used to detect biological and non-biological molecules.
该发明涉及基于对称或非对称3-螺环
氰化物的立体屏蔽、稳定的荧光
染料,以及它们在分析程序中作为标记分子的利用。根据该发明的荧光
染料具有由于插入庞大的螺环取代基而导致的明显减少聚集倾向,因此能够在不显著损失荧光的情况下与目标分子发生高度耦合。它们因此具有高量子产率,因此非常适用作为荧光
染料,特别是作为NIR荧光
染料,用于耦合或结合到用于分析方法中的
生物和非
生物目标分子。这些分析方法包括所有使用荧光光学方法来检测
生物和非
生物分子的方法。