CAJ | 학술논문

设计合成了用以检测过渡金属离子的荧光化学敏感器体系,它们是由1,8-萘二酰亚胺为荧光团,多胺衍生物为金属离子受体组成.在室温下对其光物理性质的研究中发现,在没有加入过渡金属离子时,由于体系内存在有效的光诱导电子转移过程使得荧光团的荧光被淬加入过渡金属离子后,金属离子受体中的氮原子和过渡金属离子之间的配位作用阻断了光诱导电子转移过程,体系的荧光增强.不同的金属离子受体表现出了和过渡金属离子不同的配位识别能力,并且通过荧光的变化传递出受体-金属离子作用的信息.
설계합성료용이검측과도금속리자적형광화학민감기체계,타문시유1,8-내이선아알위형광단,다알연생물위금속리자수체조성.재실온하대기광물이성질적연구중발현,재몰유가입과도금속리자시,유우체계내존재유효적광유도전자전이과정사득형광단적형광피쉬가입과도금속리자후,금속리자수체중적담원자화과도금속리자지간적배위작용조단료광유도전자전이과정,체계적형광증강.불동적금속리자수체표현출료화과도금속리자불동적배위식별능력,병차통과형광적변화전체출수체-금속리자작용적신식.
A series of fluorescent chemosensors 1-3 were synthesized to detect transition metal ions. At the room temperature, fluorescence intensities of these chemosensors in acetonitrile without transition metal ions were found to be very weak, due to the process of the efficient intramolecular photoinduced electron transfer (PET). However, after addition of the transition metal ions, the chemosensor 1-3 exhibits obvious fluorescence enhancement. Moreover, the intensity of the fluorescence emission of chemosensors increases significantly in the presence of Zn2+ and Cd2+. The fluorescent chemosensors with different polyamine as receptors show diverse affinity abilities to the transition metal ions and signal the receptor-metal ion interaction by the intensity change of fluorescence emission.