应用化学 ›› 2022, Vol. 39 ›› Issue (5): 787-796.DOI: 10.19894/j.issn.1000-0518.210147

• 研究论文 • 上一篇    下一篇

可区别铁离子荧光探针异构体的合成及其水样分析

温景惠1, 赵冰1,2(), 阚伟1,2, 王丽艳1,2, 孙立1, 宋天舒1, 宋波1,2   

  1. 1.齐齐哈尔大学化学与化学工程学院,齐齐哈尔 161006
    2.黑龙江省表面活性剂与工业助剂重点实验室,齐齐哈尔 161006
  • 收稿日期:2021-04-12 接受日期:2021-08-27 出版日期:2022-05-01 发布日期:2022-05-24
  • 通讯作者: 赵冰
  • 基金资助:
    国家自然科学基金(21978140);黑龙江省科技厅留学归国人员科学基金(LC2017004);黑龙江省省属高等学校基本科研业务经费(YSTSXK201853);黑龙江省人力资源和社会保障厅省级领军人才梯队后备带头人项目(HLJLY2018008);齐齐哈尔大学研究生创新科研项目(YJSCX2019037)

Synthesis of Isomers of Distinguishable Iron(Ⅲ) Fluorescent Probes and Application in Water Samples

Jing-Hui WEN1, Bing ZHAO1,2(), Wei KAN1,2, Li-Yan WANG1,2, Li SUN1, Tian-Shu SONG1, Bo SONG1,2   

  1. 1.College of Chemistry and Chemical Engineering,Qiqihar University,Qiqihar 161006,China
    2.Heilongjiang Provincial Key Laboratory of Surface Active Agent and Auxiliary,Qiqihar 161006,China
  • Received:2021-04-12 Accepted:2021-08-27 Published:2022-05-01 Online:2022-05-24
  • Contact: Bing ZHAO
  • About author:zhao_submit@aliyun.com
  • Supported by:
    the National Natural Science Foundation of China(21978140);the Natural Science Foundation of Heilongjiang Province(LC2017004);the Fundamental Research Funds in Heilongjiang Provincial Universities(YSTSXK201853);the Echelon Reserve Leader Fund for the Leading Talent of Heilongjiang Province(HLJLY2018008);Qiqihar University Graduate Innovation Fund Grants(YJSCX2019037)

摘要:

分别以2-(2-氨基苯基)菲并咪唑和2-(3-氨基苯基)菲并咪唑为原料,与5-硝基水杨醛反应合成了两个菲并咪唑-苯酚异构体衍生物(PI?o?OHPI?m?OH)。在水相体系中(V(DMF)∶V(HEPES) = 1∶1,pH = 7.4),两个异构体发射中等强度的荧光。Fe3+存在下,两个异构体的荧光强度分别淬灭为原来的1/3和1/6,淬灭常数为4.8×103和4.6×103 L/mol,且淬灭效果不受其它干扰离子和pH值变化的影响。间位异构体PI?m?OH与Fe3+的荧光识别在2 min之内完成,配合速度明显优于邻位基异构体,且配合稳定性高于邻位异构体,配合常数为3.82×104 L/mol。通过高分辨质谱和Job's曲线,确定了两个异构体与Fe3+识别配合比为1∶1,并建议了PI?m?OH-Fe3+ and PI?o?OH-Fe3+两个配合物的结构。两个异构体均可实现实际水样中Fe3+的定量检测,表明它们在实际水样的Fe3+分析中具有一定的应用价值。

关键词: [9,10-d]菲并咪唑, 异构体, 区别识别, 铁离子, 水样, 配合比

Abstract:

Two isomeric phenanthro[9,10-d]imidazole-phenol derivatives (PI?o?OH and PI?m?OH) were synthesized by the reaction of isomeric 2-aminophenyl and 3-aminophenyl phenanthro[9,10-d]imidazole and 5-nitro salicylaldehyde. In the aqueous medium (V(DMF)∶V(HEPES) = 1∶1, pH = 7.4), fluorescent intensities for two isomers were observed and the fluorescence was quenched by the addition of Fe3+ with the quenching ratio of 1/3 and 1/6. The quenching effects are not disturbed by other metal ions and pH value with the quenching constants Ksv of 4.8×103 L/mol and 4.6×103 L/mol, respectively. Specially, PI?m?OH has the ability to respond to Fe3+ within 2 min, which is much quicker than that of PI?o?OH. Furthermore, the coordination constant Kass between PI?m?OH and Fe3+ is 3.82×104 L/mol and higher than that of PI?o?OH, which means that PI?m?OH has better stabilities of coordination with Fe3+. The complexation ratio between two compounds and Fe3+ is determined by HRMS and Job's curves, based on which the structures for PI?m?OH-Fe3+ and PI?o?OH-Fe3+ are proposed. Besides, both isomeric probes could quantitatively detect the concentration of Fe3+ in real water sample by the fluorescence method, indicating that they have potential application in analyzing Fe3+ .

Key words: Phenanthro[9,10-d]imidazole, Isomerization, Distinguishable recognition, Iron(Ⅲ), Real water sample, Complex ratio

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