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摘要 具有分子导线效应的荧光共轭聚合物,能对响应信号起放大作用,在光化学传感器设计中可用来进行痕量分析.利用Sonogashira偶合反应合成了一系列新的聚苯乙炔一他咬荧光共轭聚合物.考察了结构的改变对它们物理性质和光谱特性的影响,并通过 Pd‘”熄灭这些共轭聚合物荧光的效率不同,讨论了共轭聚合物结构的调整对响应信号的影响.结果表明他埃环含量及位置调整是影响二价把离子熄灭这些共轭聚合物荧光效率的重要因素;具有分子导线效应的PfhvR环嵌段的荧光共轭聚合物PI对Pd’“离子有最大的特异性响应,相对其单体模型分子,其传感响应信号放大近 65倍.
Abstract Fluorescent conjugated polymers with molecular lead effect can amplify the response signal and can be used for the trace analysis in the design of photochemical sensors.A series of new polyphenylacetylene- The influence of structural changes on their physical properties and spectral properties was investigated, and the effect of adjusting the conjugated polymer structure on the response signal was discussed by the different efficiency of Pd ’s quenching the fluorescence of these conjugated polymers. The results show that the content and the position of his ring are the important factors that affect the fluorescence efficiency of these conjugated polymers by bi-valent ion quenching. The fluorescent conjugated polymer PI with PfhvR ring block with molecular lead effect has the largest Pd Of the specific response, relative to its single molecule model, the sensor response signal amplification nearly 65 times.