期刊信息

  • 刊名： 河北师范大学学报（自然科学版）Journal of Hebei Normal University (Natural Science)
  • 主办： 河北师范大学
  • ISSN： 1000-5854
  • CN： 13-1061/N
  • 中国科技核心期刊
  • 中国期刊方阵入选期刊
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  • 河北省优秀科技期刊

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一种简单高效识别Fe3+的荧光探针

  • 渤海大学 化学化工学院, 辽宁 锦州 121013
  • DOI： 10.13763/j.cnki.jhebnu.nse.2018.03.008

A Simple Schiff Base Probe for Recognition of Fe3+ Ions

摘要/Abstract

摘要：

利用1萘甲醛和2氨基苯硫酚合成了一种简单高效的荧光探针N，通过1HNMR和HRMS表征了其结构.在纯的二甲基亚砜（DMSO）中Fe3+会使探针出现明显的荧光猝灭现象，而加入其他阳离子没有明显变化，证明化合物N对Fe3+具有很好的识别能力.通过对10μmol/L的受体进行滴定实验，测得探针N对Fe3+具有较低的检测限（1.4μmol/L）.加入金属离子后的化合物N依然对Fe3+有较强的选择性，可知其具有很好的抗干扰能力.当荧光发射强度出现了转折点时探针N的摩尔比为0.5，证明探针N与Fe3+的结合比为1：1，结合常数为8.14×103L/mol.

Abstract：

A simple and efficient fluorescent probe N was synthesized by using 1-naphthalene formaldehyde and 2-aminothiophenol.The structure was characterized by 1HNMR and HRMS.Fe3+ exhibits a significant fluorescence quenching phenomenon on the probe in pure dimethyl sulfoxide (DMSO),while adding other experimental cations have no obvious changes in fluorescence,proving that compound N has good recognition ability to Fe3+.A lower detection limit (1.48μmol/L) of Fe3+ was measured based on 10μmol/L receptor titration experiment.After the mixture of other metal ions,sensor N still had strong selectivity to Fe3+,which proves a good anti-interference ability.The probe N ratio was close to 0.5 when the fluorescence emission intensity was in a turning point.The combination of probe N and Fe3+ is 1:1,and the binding constant is 8.14×103L/mol.

关键词

关键词： 1-萘甲醛 ; 2-氨基苯硫酚 ; Fe3+ ; 荧光猝灭
Key words： 1-naphthalene formaldehyde ; 2-aminothiophenol ; Fe3+ ; fluorescence quenching

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