以吖啶染料荧光猝灭为基础的卤素阴离子检测研究

合成了两种吖啶及吖啶橙盐类小分子化合物和带有吖啶盐的三元共聚物 .研究了它们在溶液中的荧光被卤素离子猝灭的问题 .发现它们能强烈地被碘离子所猝灭而不易被氯离子猝灭 ,表明这类化合物有可能用于在有氯离子存在条件下对碘、溴离子的检测 .对荧光猝灭机理进行的研究发现 ,卤素离子的猝灭能力并不和它们对发光化合物的系间窜越和三重态的生成等有关 ,而是和阴离子对极化分子的作用减弱了分子内的电荷转移能力相关

BASED ON THE FLUORESCENCE QUENCHING OF ACRIDINE DYES FOR DETERMINATION OF HALOGEN ION

Two kinds of acridine and acridine orange salts and acridine containing terpolymer were synthesized in this work.The fluorescence quenching of these emissive compounds in solution by halogen anions was studied carefully.It is found that the fluorescence of these compounds can be quenched by iodine ion easier than chloride ion which indicates that this kind of compounds may be used as a sensor for detection of iodide in the presence of chloride.As for the mechanism of fluorescence quenching of acridine it was found that the quenching is not dependent on the heavy atom effect to form triplet state of acridine,but on the fail in the intra molecular charge transfer process of excited acridine by halogen ion introduced.