Effects of Boronic Acid on the Fluoride-selective Chemosignaling Behavior of a Merocyanine Dye
作者:Sun-Young Cha、Hye-Lim Jeon、Myung-Gil Choi、Jong-In Choe、Suk-Kyu Chang
DOI:10.5012/bkcs.2010.31.5.1309
日期:2010.5.20
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。