论文部分内容阅读
含 1 萘胺二乙酸 (NADA)的水溶液仅以Na2 SO3作除氧剂 ,以TlNO3作重原子微扰剂 ,即能产生强而稳定的室温光 (RTP)信号 ,其最大激发和发射波长λex/λem 为 3 2 1/5 71nm ,浓度分别在 1.0× 10 - 6 ～ 1.0× 10 - 5mol/L和 2 .0× 10 - 7～ 1.0× 10 - 6 mol/L范围内与RTP强度呈良好线性关系 ,检测限为 1.2× 10 - 8mol/L。NADA作为一种n→π 跃迁型的发光性氨羧络合剂 ,当其与金属离子配位时 ,因其氮原子上的n电子参于配位 ,显著降低氮原子上的电荷密度 ,提高了分子内电荷转移 (ICT)态的能量 ,发光量子产率降低 ,从而荧 ( )光强度下降 ,并显示出对不同金属离子的选择性识别作用
The aqueous solution containing 1 NADA only uses Na2 SO3 as the oxygen scavenger and TlNO3 as the heavy atom perturbation agent to produce a strong and stable RTP signal with the maximum excitation and emission wavelengths λex / λem was 3 2 1/5 71 nm with the intensities of RTP and RTP in the range of 1.0 × 10-6 ~ 1.0 × 10-5 mol / L and 2.0 × 10-7 ~ 1.0 × 10-6 mol / L, respectively A good linear relationship, the detection limit of 1.2 × 10 - 8mol / L. As a kind of n → π transition luminescent ammonia complexing agent, NADA, when coordinated with metal ions, can reduce the charge density of nitrogen atoms and increase the density due to the coordination of n electrons on the nitrogen atoms The energy of the intramolecular charge transfer (ICT) state decreases the quantum yield of the luminescence, so that the fluorescence intensity of the fluoranthene () decreases and shows a selective recognition effect on different metal ions