Amphiphilic carbazole pyridinium conjugates are synthesized and characterized by IR, 1H and [Formula: see text]C NMR and ESI-MS spectrometry. The pyridinium group is attached on the 3-position of the carbazole ring and long alkyl chains are linked to the central [Formula: see text] atom. The introduction of a pyridinium group afforded water-soluble carbazole derivatives with significant bathochromic shifts in their absorption and emission spectra. As compared to the parent [Formula: see text]-butylcarbazole compound, carbazole pyridinium conjugates exhibited 50 nm red-shifted absorption maxima. Similarly, the carbazole pyridinium conjugates displayed 143–147 nm red-shifted emission maxima in solution. In addition, large Stokes shifts (5747–7558 cm[Formula: see text] were observed for the conjugates in solution. The cell penetrable amphiphilic carbazole pyridinium conjugates exhibited cytoplasmic distribution in A549 cells.
合成了两亲性咔唑吡啶鎓共轭物,并通过红外光谱、1H 和[式:见正文]C NMR 以及 ESI-MS 光谱对其进行了表征。吡啶鎓基团连接在咔唑环的 3 位上,长烷基链连接到中心[式:见正文]原子上。引入吡啶基后,水溶性咔唑衍生物的吸收光谱和发射光谱发生了显著的浴色偏移。与母体[式:见正文]-丁基咔唑化合物相比,咔唑吡啶鎓共轭物表现出 50 纳米的红移吸收最大值。同样,咔唑吡啶鎓共轭物在溶液中显示出 143-147 纳米的红移发射最大值。此外,还观察到共轭物在溶液中存在较大的斯托克斯位移(5747-7558 厘米[式:见正文])。可穿透细胞的两亲性咔唑吡啶鎓共轭物在 A549 细胞中呈细胞质分布。