高等学校化学学报 ›› 2019, Vol. 40 ›› Issue (7): 1352-1358.doi: 10.7503/cjcu20180873

• 研究论文: 无机化学 • 上一篇    下一篇

荧光素-层状双金属氢氧化物复合体的发光性能及对Fe3+的荧光识别

梁足培1, 苏飞飞2, 国荣2, 唐昱垚2,*, 金烁2,*, 于梓洹2, 李建1(), 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:2018-12-28 出版日期:2019-07-10 发布日期:2019-07-12
  • 通讯作者: 唐昱垚,金烁 E-mail:ljwfu@163.com;mashulan@bnu.edu.cn
  • 作者简介:李 建, 女, 副教授, 主要从事功能材料的制备与应用研究. E-mail: ljwfu@163.com; 马淑兰, 女, 博士, 教授, 主要从事层状复合材料合成与性质研究. E-mail: mashulan@bnu.edu.cn; * 唐昱垚和金烁目前所在单位为北京市第五十五中学.
  • 基金资助:
    山东省自然科学基金(批准号: ZR2015BL024)、 国家自然科学基金(批准号: U1832152)和北京市自然科学金(批准号: 2182029)资助.

Photoluminescence Property of Layered Double Hydroxide Composite with Fluorescein and Detection Towards Fe3+

LIANG Zupei1, SU Feifei2, GUO Rong2, TANG Yuyao2, JIN Shuo2, YU Zihuan2, LI Jian1,*(), MA Shulan2,*()   

  1. 1. Chemistry & Chemical and Environmental Engineering College, Weifang University, Weifang 261061, China
    2. College of Chemistry, Beijing Normal University, Beijing 100875, China
  • Received:2018-12-28 Online:2019-07-10 Published:2019-07-12
  • Contact: LI Jian,MA Shulan E-mail:ljwfu@163.com;mashulan@bnu.edu.cn
  • Supported by:
    † Supported by the Natural Science Foundation of Shandong Province, China(No.ZR2015BL024), the National Natural Science Foundation of China(No. U1832152) and the Natural Science Foundation of Beijing, China(No. 2182029).

摘要:

采用离子交换法合成了FLN/OS-LDH复合体(FLN: 荧光素, OS: 1-辛烷磺酸钠, LDH: 镁铝型层状双金属氢氧化物), 并研究了其光致发光和对Fe3+的识别性能. 固态时, FLN不发光, 而FLN/OS-LDH复合体呈黄绿色荧光(发射波长为565 nm), 是荧光素(FLN)的特征发射光. 在甲酰胺(FM)中可将该复合体方便剥离为胶状悬浮液, 其发射波长发生蓝移, 为绿光发射(531 nm). 研究了复合体剥离液对金属离子的荧光识别特性, 发现其对Fe3+的选择性识别能力很强, 远优于其它离子(Mg2+, Ni2+, Co2+, Cu2+, Zn2+, Pb2+, Cd2+和Hg2+). 该复合体与Fe3+结合发生荧光猝灭现象, 可将其用作检测Fe3+的荧光传感器. Fe3+检测限为1.27×10-7 mol/L, 猝灭常数(Ksv)为3.44×102 L/mol.

关键词: 荧光素, 层状双金属氢氧化物, 荧光化学传感, Fe3+识别

Abstract:

FLN/OS-LDH composite(FLN is fluorescein, OS is 1-octane sulfonic acid sodium, and LDH is MgAl layered double hydroxide) was synthesized via ion-exchange method and the photoluminescence and detection for Fe(Ⅲ) was tested. In solid state, the FLN/OS-LDH composite displayed yellowish green emission(565 nm) arising from organic FLN. In formamide(FM), the FLN/OS-LDH can be feasily delaminated into colloidal suspention, and showed blue-shifted green emission(ca. 531 nm). The recognition ability of the FLN/OS-LDH for metal cations was researched. The delaminated FLN/OS-LDH colloid in formamide exhibited high selectivity for Fe3+ over other ions(Mg2+, Ni2+, Co2+, Cu2+, Zn2+, Mn2+, Pb2+, Cd2+, and Hg2+) with obvious fluorescence quenching, which can work as a kind of effective fluorescence sensor for detection of Fe3+. The detection limit of Fe3+ is determined to be 1.27×10-7 mol/L and the quenching constant(Ksv) is 3.44×102 L/mol.

Key words: Fluorescein, Layered double hydroxide(LDH), Fluorescence chemosensor, Detection of Fe3+

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