CAJ | 학술논문

铜离子催化的氧化关环有机反应,用于选择性荧光探测金属铜离子的存在.晶体结构和光谱分析表明,在DPKA的乙腈/水混合溶剂中,引入铜离子可以促使苯并三氮唑类荧光化合物(2)的形成,该反应可以使得溶液的荧光明显增强.而且在滴定溶液里,引入Cu2+螯合剂EDTA,并不能使得溶液的荧光减弱,表明荧光是由有机物2发射的.同时,其他金属离子的引入并不能产生荧光,而且干扰离子的存在也不能使得荧光光谱发生显著改变,表明DPKA可以高选择性的检测溶液中的铜离子.研究表明,荧光响应呈现2个线性关系,区间分别在0.64～3.2 mg·kg-1和3.84～7.04 mg·kg-1.
동리자최화적양화관배유궤반응,용우선택성형광탐측금속동리자적존재.정체결구화광보분석표명,재DPKA적을정/수혼합용제중,인입동리자가이촉사분병삼담서류형광화합물(2)적형성,해반응가이사득용액적형광명현증강.이차재적정용액리,인입Cu2+오합제EDTA,병불능사득용액적형광감약,표명형광시유유궤물2발사적.동시,기타금속리자적인입병불능산생형광,이차간우리자적존재야불능사득형광광보발생현저개변,표명DPKA가이고선택성적검측용액중적동리자.연구표명,형광향응정현2개선성관계,구간분별재0.64～3.2 mg·kg-1화3.84～7.04 mg·kg-1.
A Cu-promoted ring-closed reaction of di-pyridylketone azine (DPKA) was developed in the design of a fluorescent chemodosimeter for potential selective Cu (Ⅱ)detection. Structure and spectroscopic investigations demonstrated the formation of a 3H-pyrazolo[4,3-b]pyridine (2) and the "turn-on" response for Cu(Ⅱ) in aqueous acetonitrile media. The introduction of Cu2+ chelator, such as EDTA, into the titration solution will not weaken the fluorescence, indicating the fluorescence is emitted from the organic compound (2). Two independent linear correlations exist in the range of 0.64～3.2mg·kg-1 and 3.84～7.04mg·kg-1,respectively.