We report a new type of UV-excitable red/NIR-emissive fluorescent dyads (PKF series). Conjugation of a pyrene and a novel bright red/near-infrared (NIR) fluorophore resulted in large quasi-Stokes shift while retaining intense fluorescence emission and sharp spectral bands. Labeling of PKF dyads to biomolecules was performed by means of introduction of a succinimidyl ester. Simultaneous Ca2+/albumin dual-color intracellular imaging by PKF in combination with fura-2 (UV-excitable/VIS-emissive Ca2+ indicator) reveals its usefulness as a new bioimaging tool.
我们报告了一种新型紫外可激发红色/近红外可激发荧光二元体(PKF 系列)。
芘和新型亮红/近红外(NIR)荧光团的共轭产生了较大的准斯托克斯位移,同时保留了强烈的荧光发射和清晰的光谱带。通过引入琥珀
酰亚胺酯,将 PKF 二聚体标记到
生物大分子上。PKF 与 fura-2(紫外可激发/可见光可激发 Ca2+ 指示剂)结合使用,可同时进行 Ca2+/ 白蛋白双色细胞内成像,这揭示了 PKF 作为一种新型
生物成像工具的实用性。