We synthesized two-photon absorption probes based on naphthalene and anthracene: 1,1′-dimethyl-4,4′-(2,6-naphthylenedi-2,1-ethenediyl)dipyridinium diiodide (NP) and 1,1′-dimethyl-4,4′-(2,6-anthrylenedi-2,1-ethenediyl)dipyridinium diiodide (AC). These two probes were successfully accumulated in mitochondria with different fluorescence colors: yellow (NP) and red (AC). Two-photon absorption cross sections (σ(2)) were 712 and 685 GM (1 GM = 10−50 cm4 s photon−1 molecule−1), respectively. These values are nine times larger than the σ(2) of the commercially available mitochondria-selective probe with efficient two-photon absorption property (rhodamine 123).
我们合成了基于
萘和
蒽的双光子吸收探针:1,1′-二甲基-4,4′-(2,6-
萘二基-2,
1-乙烯二基)二
吡啶鎓二
碘化物(NP)和1,1′-二甲基-4,4′-(2,6-
蒽二基-2,
1-乙烯二基)二
吡啶鎓二
碘化物(AC)。这两种探针成功地在线粒体中积累了不同的荧光颜色:黄色(NP)和红色(AC)。双光子吸收截面(σ(2))分别为 712 GM 和 685 GM(1 GM = 10-50 cm4 s 光子-1 分子-1)。这些数值比市面上具有高效双光子吸收特性的线粒体选择性探针(
罗丹明 123)的σ(2) 大九倍。