1.中国科学院青海盐湖研究所,中国科学院盐湖资源综合高效利用重点实验室,青海 西宁 810008
2.青海省盐湖资源化学重点实验室,青海 西宁 810008
3.中国科学院大学,北京 100049
付振海,博士,副研究员,研究方向:荧光探针、盐湖化工,E-mail:fzh@isl.ac.cn
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付振海,王敏,李志伟等.一种8-羟基喹啉衍生物的制备及其对Mg2+的检测[J].分析测试学报,2021,40(10):1520-1525.
FU Zhen-hai,WANG Min,LI Zhi-wei,et al.Synthesis of a Fluorescence Probe Based on 8-Hydroxyquinoline Derivative and Its Application in Mg2+ Ion Detection[J].Journal of Instrumental Analysis,2021,40(10):1520-1525.
付振海,王敏,李志伟等.一种8-羟基喹啉衍生物的制备及其对Mg2+的检测[J].分析测试学报,2021,40(10):1520-1525. DOI: 10.19969/j.fxcsxb.21020502.
FU Zhen-hai,WANG Min,LI Zhi-wei,et al.Synthesis of a Fluorescence Probe Based on 8-Hydroxyquinoline Derivative and Its Application in Mg2+ Ion Detection[J].Journal of Instrumental Analysis,2021,40(10):1520-1525. DOI: 10.19969/j.fxcsxb.21020502.
该文以8-羟基喹啉-5-醛与苯甲酰肼反应后的酰腙作为荧光探针,利用,1,H NMR、,13,C NMR、MS以及荧光光谱对其结构和性质进行表征和测试。结果表明,在二甲基亚砜-4-羟乙基哌嗪乙磺酸(DMSO-HEPES)缓冲溶液(20 mmol/L,pH 7.0,95∶5,体积比)中,探针能够通过577 nm处的荧光增强选择性识别Mg,2+,,检出限达8.2 × 10,-8, mol/L。此外,该探针还可以利用604、611 nm处的荧光增强来选择性识别Cd,2+,和Zn,2+,。理论优化计算表明,探针与Mg,2+,之间以2∶1形成配位后,HOMO与LUMO间的能级差缩小,电子云密度增大,从而在荧光光谱中表现出荧光增强。
A fluorescence probe was designed and synthesized by the reaction between 8-hydroxyquinoline-5-carbaldehyde and benzohydrazide in this work,which was characterized by ,1,H NMR, ,13,C NMR and MS,and then employed in the selective fluorescence detection of Mg,2+, ion.All experimental results showed that the probe exhibits a good selectivity towards Mg,2+, ion by using fluorescence enhancement at 577 nm in DMSO-HEPES buffer solution(20 mmol/L,pH 7.0,95∶5,by volume),with a detection limit for Mg,2+, ion as low as 8.2 × 10,-8, mol/L.In addition,the probe could also be used to detect Cd,2+, ion or Zn,2+, ion at the wavelengths of 604 nm and 611 nm.Theoretical calculation demonstrated that,after the formation of a 2∶1 stoichiometric complex between probe and Mg,2+, ion,the electron density mainly concentrated around Mg,2+, ion,resulting in the fluorescence enhancement due to the smaller energy gap of probe + Mg,2+, system.
荧光探针8-羟基喹啉镁离子希夫碱
fluorescence probe8-hydroxyquinolineMg2+ ionSchiff-base
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