probe QP was found to respond H2PO4- and HPO42- among other important biological anions via fluorescence turn-on response at physiological pH. Fluorescence microscopy imaging using living Hela cells showed that probe QP could be used as an effective fluorescent probe for detecting Cu2+ cation and H2PO4- and HPO42- anions in living cells.
已设计并合成了一个由奎奴定功能化的探针QP。在生理pH值下,它对大多数
生物学上重要的离子均表现出对Cu2 +离子的选择性关闭荧光响应。通过荧光滴定,Job's图和ESI-MS确定探针QP与Cu2 +离子的结合比为1:1。发现Cu 2+与探针QP的结合常数(K)为2.12×104M-1。此外,发现探针QP的Cu2 +集合体在生理pH值下通过荧光开启响应对H2PO4-和HPO42-具有重要的反应。使用活Hela细胞的荧光显微镜成像显示,探针QP可用作检测活细胞中Cu2 +阳离子和H2PO4-和HPO42-阴离子的有效荧光探针。