Novel spirobifluorene derivatives bearing two and four sulfonamidopicolyl groups were successfully synthesized by Sonogashira couplings. These strongly emissive compounds showed a good selective fluorescent quenching by Au(III) ion in acidic aqueous media solution with three-time-noise detection limits of 9.8 and 86.8 nM. The data from ¹H-NMR, UV–vis spectroscopy, and the observation of the Tyndall effect strongly supported a static aggregation-induced quenching mechanism. The application of these sensors for quantitative analysis of spiked Au(III) ion in real water samples from 5 different sources resulted in excellent recoveries.

通过Sonogashira偶联成功地合成了带有两个和四个磺酰胺基二烯丙基的新型螺二芴衍生物。这些强发射化合物在酸性水性介质溶液中显示出通过Au（III）离子的良好选择性荧光猝灭，其三倍噪声检测极限分别为9.8和86.8 nM。来自¹ H-NMR，UV-vis光谱的数据以及对廷德尔效应的观察强烈支持了静态聚集诱导的猝灭机理。这些传感器用于定量分析来自5种不同来源的真实水样中加标的Au（III）离子的应用可实现出色的回收率。