9,10-Anthraquinone-based chemosensor 1 indicates the presence of Cu(II) ions among other transition metal ions with high selectivity by a color change from yellow to dark red. Chemosensor 2 shows binding toward Cu(II), Ni(II) and Co(II) with color changes from yellow to dark red, red and pale green, respectively. Especially, Co(II) binding with chemosensor 2 causes significantly green fluorescence. On addition of Cu(II), 1 and 2 exhibit 76 and 80 nm red shifts in absorption wavelength (pH 7.0). The effect on pH by the formation of these 1-Cu(II) and 2-Cu(II) complexes was determined by UV-vis spectroscopic pH titration. In the pH range of 6–7.5, a maximum absorption was observed at 473 nm and exhibited the formation of deprotonated 1-Cu(II) and 2-Cu(II) complexes.
基于 9、10-
蒽醌的
化学传感器 1 通过从黄色到暗红色的颜色变化,高选择性地显示出其他过渡
金属离子中是否存在
铜(II)离子。
化学传感器 2 显示与 Cu(II)、Ni(II) 和 Co(II) 的结合,颜色分别从黄色变为暗红色、红色和淡绿色。尤其是与
化学传感器 2 结合的 Co(II) 会发出明显的绿色荧光。加入 Cu(II)后,1 和 2 的吸收波长(pH 值为 7.0)分别发生了 76 和 80 纳米的红色偏移。这些 1-Cu(II) 和 2-Cu(II) 复合物的形成对 pH 值的影响是通过紫外可见光谱 pH 滴定法确定的。在 pH 值为 6-7.5 的范围内,在 473 纳米处观察到最大吸收,表明形成了去质子化的 1-Cu(II) 和 2-Cu(II) 复合物。