CAJ | 학술논문

以3-溴代-N-丁基咔唑和4-苯基-3-氨基硫脲为原料,合成了一种新型含咔唑基的硫脲席夫碱L,使用紫外-可见光谱、荧光光谱、核磁氢谱以及质谱等对其成分结构、离子识别性能、识别模式进行了研究。结果表明：L对Hg2+和Ag+具有快速响应的可视化选择性识别。当Hg2+或Ag+加入后,L溶液的颜色由无色立刻变为黄色；同时,L溶液中加入Hg2+和Ag+后,荧光光谱有不同变化,且其他离子的存在并不干扰L对Hg2+和Ag+的选择性识别。研究还发现,L对Hg2+和Ag+的荧光识别模式不同：加入Ag+后,L与Ag+生成了配合物,发生荧光猝灭；加入Hg2+后,L先与Hg2+络合发生荧光猝灭,然后脱去HgS。
이3-추대-N-정기잡서화4-분기-3-안기류뇨위원료,합성료일충신형함잡서기적류뇨석부감L,사용자외-가견광보、형광광보、핵자경보이급질보등대기성분결구、리자식별성능、식별모식진행료연구。결과표명：L대Hg2+화Ag+구유쾌속향응적가시화선택성식별。당Hg2+혹Ag+가입후,L용액적안색유무색립각변위황색；동시,L용액중가입Hg2+화Ag+후,형광광보유불동변화,차기타리자적존재병불간우L대Hg2+화Ag+적선택성식별。연구환발현,L대Hg2+화Ag+적형광식별모식불동：가입Ag+후,L여Ag+생성료배합물,발생형광졸멸；가입Hg2+후,L선여Hg2+락합발생형광졸멸,연후탈거HgS。
A thiourea Schiff base ( L) containing carbazole was synthesized from carbazole deriva-tive and 4-phenyl-3-amino thiourea as reagents. The structure of compound L was characterized by 1 H NMR and MS. The recognition performance and the binding mode of L and metal ions were in-vestigated by UV-Vis and fluorescence spectroscopies. The results show that L has a quick visual se-lective recognition response to Hg2+ and Ag+. The addition of metal ions caused the color of L changed from colorless to yellow, and it can be identified by the naked eyes. The fluorescence spec-trum of L has different changes with the adding of Hg2+ or Ag+ to the solution. The presence of oth-er ions does not interfere with the selective recognition of L for Hg2+ and Ag+. It is also found that the binding model of L and Hg2+/Ag+ for fluorescent recognition is different: L coordinates with Ag+ to form complex which causes fluorescence quenching effect; L coordinates with Hg2+ to form complex which causes fluorescence quenching effect, then the complex removes HgS to produce a new compound.