设计合成了3种两端杂环氮原子上具有不同取代基的苯并噻唑类不对称三甲川菁染料,并对染料的结构进行了表征.测试了染料在乙醇中的吸收和荧光发射光谱,染料的最大吸收值和荧光发射值分别在629 ～635 nm和656 ～672nm之间.染料8、9和10的斯托克斯位移分别为23、37和27nm.染料在溶剂中基本无荧光,荧光量子产率小于0.021,可以极大的降低染料自身的荧光背景干扰.染料的光降解实验表明,两端杂环氮原子苄基取代后可以明显增强染料的光稳定性.测试循环伏安曲线得到染料的氧化电位分别为0.535、0.456和0.399 V,氧化电位越大,光降解速率常数越小,与光降解实验得到的降解速率常数结果一致.
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