The present invention provides lipophilic fluorescent chromophores which are suitable for use as tracer dye in lipophilic liquids, for example in leak detection applications. The lipophilic fluorescent chromophores have been provided in different shades like green, greenish-yellow, yellow, orange and red. The use of fluorescent dyes is preferred as they have a much better visibility than their conventional countertypes, especially when exposed to ultraviolet light or also better to broad spectrum lamps. The presented chromophores contains at least one substituent at least part of which extends from the planar aromatic chromophore part, the ratio of the number of atoms (no H-atoms) in the molecule forming part of non planar substituents to the number of atoms (no H-atoms) forming part of the planar aromatic chromophore structure being at least 0.75.
本发明提供了适用于在亲脂性液体中用作示踪
染料的亲脂性荧
光色素,例如在泄漏检测应用中。这些亲脂性荧
光色素具有不同的颜色,如绿色、绿黄色、黄色、橙色和红色。荧光
染料的使用更受青睐,因为它们在紫外光下或广谱灯光下的可见性比传统对应物要好得多。所述的色素包含至少一个取代基,其中至少部分从平面芳香色素部分延伸出来,分子中非平面取代基的原子数(不包括氢原子)与平面芳香色素结构中的原子数(不包括氢原子)的比率至少为0.75。