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基于题示光敏离子载体 MMC-MAC( O5)与金属离子配位时荧光或延迟荧光性质的变化 ,研究了它作为光敏主体在乙腈或水溶液中对 Li+,Na+,K+,Mg2 +,Ba2 +和 Pb2 +离子的识别性能 ,由改进的 H-B方程计算得主客识别的稳定常数和敏感因子 .结果表明 ,由于该光敏离子载体的香豆素的羰基能以七元环形式参与对金属离子的配位 ,在一定程度上增大了对客体离子的络合能力 ;在水溶液中 ,由于金属离子的溶剂化作用和因香豆素的羰基易与水形成氢键 ,影响了 MMC-MAC( O5)与客体离子的结合 ,稳定常数明显降低 .基于 MMC-MAC( O5)的分子结构和与金属离子结合时荧光强度的增强 ,讨论了识别机理
Based on the changes of the fluorescence or delayed fluorescence properties of the photoactive ionophore MMC-MAC (O5) complexed with metal ions, the effect of photosensitizer on the photoluminescence of Li +, Na +, K +, Mg2 +, Ba2 + and The recognition constants of Pb2 + ion and the stability constants and sensitive factors calculated by the modified HB equation were obtained.The results showed that the carbonyl of the coumarin of the photoactive ionophore could participate in the coordination of metal ions in a seven-membered ring , To a certain extent, increased the complexation of guest ion. In aqueous solution, due to the solvation of metal ions and the formation of hydrogen bonds with coumarin carbonyls, the interaction between MMC-MAC (O5) and The binding constants of guest ions decreased obviously.According to the molecular structure of MMC-MAC (O5) and the enhancement of fluorescence intensity when combined with metal ions, the recognition mechanism