高等学校化学学报 ›› 2018, Vol. 39 ›› Issue (10): 2154-2160.doi: 10.7503/cjcu20180153

• 研究论文:无机化学 • 上一篇    下一篇

四硫代钼酸根/1-辛烷磺酸根/LEuH复合体发光性能及对Hg2+的识别

李建1, 谢林霞2, 梁足培1(), 国荣2, 刘晨昱2, 马淑兰2()   

  1. 1. 潍坊学院化学化工与环境工程学院, 潍坊 261061
    2. 北京师范大学化学学院, 北京 100875
  • 收稿日期:2018-02-28 出版日期:2018-09-29 发布日期:2018-09-29
  • 作者简介:

    联系人简介: 梁足培, 男, 博士, 教授, 主要从事应用化学方面的研究. E-mail: zupeiliang@163.com; 马淑兰, 女, 博士, 教授, 主要从事层状复合材料方面的研究. E-mail: mashulan@bnu.edu.cn

  • 基金资助:
    山东省自然科学基金(批准号: ZR2013BL017, ZR2015BL024)和北京市自然科学基金(批准号: 2182029)资助.

Luminescence Property and Detection Capability Towards Hg2+ of LEuH Composites with MoS42- and OS- Anions

LI Jian1, XIE Linxia2, LIANG Zupei1,*(), GUO Rong2, LIU Chenyu2, MA Shulan2,*()   

  1. 1. School of Chemistry & Chemical Engineering and Environmental, Weifang University, Weifang 261061, China;
    2. College of Chemistry, Beijing Normal University, Beijing 100875, China
  • Received:2018-02-28 Online:2018-09-29 Published:2018-09-29
  • Contact: LIANG Zupei,MA Shulan E-mail:zupeiliang@163.com;mashulan@bnu.edu.cn
  • Supported by:
    † Supported by the Natural Science Foundation of Shandong Province, China(Nos.ZR2013BL017, ZR2015BL024) and the Natural Science Foundation of Beijing, China(No.2182029).

摘要:

采用改进的均匀沉淀法合成了硝酸根插层的稀土铕层状氢氧化物(NO3-LEuH), 通过离子交换法将阴离子型表面活性剂1-辛烷磺酸根(OS-)及无机阴离子Mo$S_{4}^{2-}$共插层于LEuH的层间, 通过改变Mo$S_{4}^{2-}$和OS-的投料比得到一系列发光强度不同的复合体(MoS4)xOS1-x-LEuH(x=0.02, 0.10, 0.20). 采用X射线粉末衍射仪(XRD)、 傅里叶变换红外光谱仪(FTIR)和荧光分光光度计(PL)等研究了其结构及性质. 结果表明, Mo$S_{4}^{2-}$会明显削弱层板Eu3+的红光发射, 且在一定Mo$S_{4}^{2-}$/OS-摩尔比范围内发光强度随Mo$S_{4}^{2-}$含量增加而降低. 选择Mo$S_{4}^{2-}$:OS-摩尔比为0.02:0.98的复合体(MoS4)0.02OS0.98-LEuH用于水体系重金属离子Hg2+, Cu2+, Ag+, Pb2+的荧光识别, 发现剥离态复合体对Hg2+具有选择性识别能力, 加入含Hg2+水溶液后发光有一定程度增强, 可用作off-on型荧光传感器件识别毒性Hg2+.

关键词: 1-辛烷磺酸根, 四硫代钼酸根, 层状稀土铕氢氧化物复合体, 荧光传感, Hg2+识别

Abstract:

NO3-LEuH(LEuH=layered europium hydroxide) precursor was synthesized via a developed hydrothermal method, and co-intercalation of Mo$S_{4}^{2-}$ and OS- into LEuH layers was achieved by an ion-exchange with N$O_{3}^{-}$, thus a series of composites of (MoS4)xOS1-x-LEuH(x=0.02, 0.10, and 0.20) with different molar ratios of Mo$S_{4}^{2-}$ to OS- was obtained. The structure and property of(MoS4)xOS1-x-LEuH composites were investigated via powder X-ray diffraction(XRD) patterns, Fourier transformed infrared spectra(FTIR) and photoluminescence(PL) spectra. The delaminated (MoS4)xOS1-x-LEuH in formamide presented markedly quenched luminescence of layer Eu3+ ions at 614 nm, and higher Mo$S_{4}^{2-}$:OS- molar ratios(from 0.02:0.98 to 0.20:0.80) resulted in weakened luminescence intensity. The fluorescence recognization ability towards heavy metal ions of Hg2+, Cu2+, Ag+ and Pb2+ of the delaminated (MoS4)0.02OS0.98-LEuH composite was investigated. After addition of aqueous solutions of Hg2+(0.01—10 μmol/L), the (MoS4)0.02OS0.98-LEuH exhibited enhanced luminescence of layer Eu3+.

Key words: 1-Octane sulfonate(OS-), Mo$S_{4}^{2-}$, Layered europium hydroxide(LEuH) composite, Fluorescence chemosensor, Detection of Hg2+

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