A colorimetric and ratiometric fluorescent sensor for sequentially detecting Cu<sup>2+</sup> and arginine based on a coumarin–rhodamine B derivative and its application for bioimaging
作者:Shuai Wang、Haichang Ding、Yuesong Wang、Congbin Fan、Gang Liu、Shouzhi Pu
DOI:10.1039/c8ra09943j
日期:——
colorimetric and ratiometric fluorescent sensor based on a coumarin–rhodamine B hybrid for the sequential recognition of Cu2+ and arginine (Arg) via the FRET mechanism was designed and synthesized. With the addition of Cu2+, the solution displayed a colorimetric change from pale yellow to pink which is discernible by the naked eye. Additionally, the fluorescence intensities of the sensor exhibited ratiometric
在这项工作中,设计和合成了一种基于香豆素-罗丹明 B 杂化物的比色和比率荧光传感器,用于通过FRET 机制顺序识别 Cu 2+和精氨酸 (Arg) 。随着Cu 2+的加入,溶液显示出由肉眼可辨别的从淡黄色到粉红色的比色变化。此外,传感器的荧光强度在检测 Cu 2+时表现出比例变化在 490 和 615 nm 处,在 350 nm 的单一激发波长下,分别对应于香豆素和罗丹明 B 部分的发射。荧光颜色的变化可以从蓝色到粉红色可视化。UV-vis 和荧光测量的检测限分别低至 0.50 和 0.47 μM。更重要的是,传感器不仅可以识别Cu 2+并形成传感器-Cu 2+复杂的,但也可以用得到的复合物顺序检测 Arg。Arg 的检测限分别低至 0.60 μM(UV-vis 测量)和 0.33 μM(荧光测量)。活细胞荧光成像实验表明,制备的传感器可用于细胞内Cu 2+的比例荧光成像,有望用于检测低水平Cu