The effects of boronic acid on the fluoride-selective chemosignaling behavior of a merocyanine dye were investigated. In the presence of phenylboronic acid (PBA), N-methylquinolinium-based merocyanine dye displayed fluoride-selective chromogenic signaling behavior over other commonly coexisting anions in the micromolar concentration range. Signaling is produced by a fluoride-induced displacement of the dye from its complex with PBA, resulting in a significant chromogenic signal for the fluoride ion. This signaling was successfully analyzed using a ratiometric analysis of the UV-vis absorption in response to changes in fluoride ion concentration. A PBA substituted with an electron withdrawing group was found to exhibit a more pronounced signal. Polymer-bound PBA also exhibited useful fluoride-selective signaling behavior.
研究了
硼酸对美蓝
染料氟选择性
化学信号行为的影响。在苯
硼酸(PBA)存在的情况下,N-甲基
喹啉基美蓝
染料在微摩尔浓度范围内比其他常见共存阴离子显示出
氟选择性致色信号行为。信号的产生是由于
氟诱导
染料从与 PBA 的复合物中移位,从而产生了明显的
氟离子显色信号。利用紫外-可见吸收随
氟离子浓度变化而变化的比率分析法,成功地分析了这种信号传递。结果发现,被一个电子撤回基团取代的 PBA 信号更为明显。与聚合物结合的 PBA 也表现出有用的
氟选择性信号行为。