The well-known 8-aminoquinoline framework offers an ideal model for the development of fluorescence-enhanced chemosensors through simple and convenient syntheses. Herein, a novel and simple molecule chemosensor, 5-diethylamino-2-(quinolin-8-yliminomethyl)-phenol (HL), has been designed by combining an 8-aminoquinoline moiety and a 4-(diethylamino)salicylaldehyde in a single molecule to prove the selectivity and sensitivity for Mg2+, Zn2+, and Co2+ in a dual-channel mode (fluorescence emission and UV/Vis). When binding Mg2+, HL not only showed an obvious fluorescence enhancement but also enabled the Mg2+ detection range over 1.68 ppb. Meanwhile, in mixed solvent media, HL displayed selectivity for Zn2+ over other cations by the emission spectrum. It was worth noting that HL could be a colorimetric sensor for Co2+ in a semi-aqueous solution by monitoring the absorption spectral behavior and be a colorimetric reagent for sensing and staining of Co2+ in the cells. The results indicate that HL can be applied in multianalyte detection.
众所周知的
8-氨基喹啉骨架为荧光增强型
化学传感器的开发提供了理想的模型,通过简单方便的合成即可实现。在此,一种新颖且简单的分子
化学传感器5-
二乙基氨基-2-(
喹啉-8-亚
氨基甲基)-
苯酚(HL)被设计出来,它通过将
8-氨基喹啉部分和4-(
二乙基氨基)
水杨醛结合在一个分子中,以双通道模式(荧光发射和紫外/可见光)证明了其对Mg2+、Zn2+和Co2+的选择性和敏感性。当结合Mg2+时,HL不仅显示出明显的荧光增强,而且使Mg2+的检测范围超过1.68 ppb。同时,在混合溶剂介质中,HL通过发射光谱显示出对Zn2+的选择性,而不是其他阳离子。值得注意的是,HL可以通过监测吸收光谱行为,成为半
水溶液中Co2+的比色传感器,并成为细胞中Co2+的检测和染色的比色试剂。结果表明,HL可以应用于多分析物检测。