A chalcone series (3a–f) with electron push–pull effect was synthesized via a one-pot Claisen–Schmidt reaction with a simple purification step. The compounds exhibited strong emission, peaking around 512–567 nm with mega-stokes shift (∆λ = 93–139 nm) in polar solvents (DMSO, MeOH, and PBS) and showed good photo-stability. Therefore, 3a–f were applied in cellular imaging. After 3 h of incubation, green fluorescence was clearly brighter in cancer cells (HepG2) compared to normal cells (HEK-293), suggesting preferential accumulation in cancer cells. Moreover, all compounds exhibited higher cytotoxicity within 24 h toward cancer cells (IC50 values ranging from 45 to 100 μM) than normal cells (IC50 value >100 μM). Furthermore, the antimicrobial properties of chalcones 3a–f were investigated. Interestingly, 3a–f exhibited antibacterial activities against Escherichia coli and Staphylococcus aureus, with minimum bactericidal concentrations (MBC) of 0.10–0.60 mg/mL (375–1000 µM), suggesting their potential antibacterial activity against both Gram-negative and Gram-positive bacteria. Thus, this series of chalcone-derived fluorescent dyes with facile synthesis shows great potential for the development of antibiotics and cancer cell staining agents.
一个具有电子推移-拉动效应的茚酮系列(3a-f)通过一步法克莱森-施密特反应合成,具有简单的纯化步骤。这些化合物在极性溶剂(DMSO、MeOH和PBS)中表现出强烈的发光特性,峰值约为512-567纳米,具有大的斯托克斯位移(Δλ=93-139纳米),并且表现出良好的光稳定性。因此,3a-f被应用于细胞成像。经过3小时的培养,与正常细胞(HEK-293)相比,癌细胞(HepG2)中的绿色荧光明显更亮,表明其在癌细胞中的优先积累。此外,所有化合物在24小时内对癌细胞表现出更高的细胞毒性(IC50值范围在45至100μM之间),而对正常细胞的IC50值大于100μM。此外,茚酮3a-f的抗菌特性也得到了研究。有趣的是,3a-f对大肠杆菌和金黄色葡萄球菌表现出抗菌活性,最小杀菌浓度(MBC)为0.10-0.60毫克/毫升(375-1000μM),表明它们对革兰氏阴性和革兰氏阳性细菌具有潜在的抗菌活性。因此,这一系列易于合成的茚酮衍生荧光染料显示出在抗生素和癌细胞染色剂开发方面具有巨大潜力。