A thiazole-based conjugated polymer was synthesized by the polymerization reaction of 4,7-dibromo-2-methylbenzo[d]thiazole with 1,4-diethynyl-2,5-bis(octyloxy)benzene via Pd-catalyzed Sonogashira coupling reaction. The conjugated polymer emits bright green fluorescence and exhibits ‘turn-off’ fluorescent quenching responses towards both Hg²⁺ and Ag⁺ over other cations, such as Li⁺, K⁺, Ca²⁺, Mg²⁺, Ba²⁺, Zn²⁺, Cd²⁺, Co²⁺, Ni²⁺, Pb²⁺, Cu²⁺, Al³⁺ and Fe³⁺. More importantly, the color change of this polymer solution could be clearly observed by the naked eyes upon the addition of Hg²⁺ (green to colorless) and Ag+ (green to yellow), indicating that this thiazole-based conjugated polymer material could be used as a colorimetric sensor for directly visual detection of Hg²⁺ and Ag⁺.

通过4,7-二溴-2-甲基苯并[ d ]噻唑与1,4-二乙炔基-2,5-双（辛氧基）苯的聚合反应，通过Pd催化的Sonogashira偶联反应合成了噻唑类共轭聚合物。共轭聚合物发出明亮的绿色荧光，并且相对于其他阳离子（例如Li ⁺，K ⁺，Ca 2 ⁺，Mg 2 ⁺，Ba 2 ⁺，Zn）对Hg ²⁺和Ag ⁺表现出“熄灭”荧光猝灭响应。²⁺，Cd 2 ⁺，Co 2 ⁺，Ni 2 ⁺，Pb 2 ⁺，Cu 2 ⁺，Al ³⁺和Fe³⁺。更重要的是，在添加Hg ²⁺（绿色至无色）和Ag +（绿色至黄色）后，用肉眼可以清楚地观察到该聚合物溶液的颜色变化，表明可以使用这种基于噻唑的共轭聚合物材料。作为比色传感器，可直接视觉检测Hg ²⁺和Ag ⁺。