A facile synthesis of a novel 4-hydroxyl-3-azo coumarin based colorimetric probes for detecting Hg(2+) and a fluorescence turn-off response of 3CBD to Fe(3+) in aqueous environment

一种新型4-羟基-3-偶氮香豆素基比色探针的简便合成方法，用于检测Hg(2+)，以及3CBD在水溶液环境中对Fe(3+)的荧光猝灭响应