• Spectroscopy and Spectral Analysis
  • Vol. 35, Issue 7, 1797 (2015)
CAO Li1、*, QIAN Ya-ao1, HUANG Yan2, CAO Juan2, JIA Chun-man1, LIU Chun-ling1, ZHANG Qi1、2, and Lv Zheng-rong3
Author Affiliations
  • 1[in Chinese]
  • 2[in Chinese]
  • 3Department of Biomedical Engineering,Case Western Reserve University,Cleveland,Ohio 44106-7207,USA
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    DOI: 10.3964/j.issn.1000-0593(2015)07-1797-05 Cite this Article
    CAO Li, QIAN Ya-ao, HUANG Yan, CAO Juan, JIA Chun-man, LIU Chun-ling, ZHANG Qi, Lv Zheng-rong. Synthesis and Spectroscopic Study of a Chemosensor for Naked Eye Recognition of Cu2+ and Hg2+[J]. Spectroscopy and Spectral Analysis, 2015, 35(7): 1797 Copy Citation Text show less

    Abstract

    Compound L,as the procedural sensor for the detection of Cu2+ and Hg2+,was designed and synthesized based on the coumarin-modified rhodamine derivative.The structure of compound L was characterized by NMR,high resolution mass spectrometry and infrared method.Its sensing behavior toward various metal ions was investigated with absorbance methods.The study found that L had good selectivity and sensitivity for Cu2+.When addition of various metal ions(Zn2+,Hg2+,Cu2+,Fe3+,Cd2+,Co2+,Ni2+,Mg2+,Ca2+,Al3+,La3+,K+,Na+,Mn2+,Pb2+and Ag+),only Cu2+ could induce a visible change of solution from colourless to pink and a new absorption band centered at 534 nm appear,which indicated that compound L could be used for the naked eye detection of Cu2+.From UV titration,the detection limit was about 1.9×10-8 mol·L-1.Test strips based on L were fabricated,and this test strips could act as a convenient and efficient Cu2+ test kit.The binding ratio of the complex of L-Cu2+ was 1∶1 according to the Job’s plot and high resolution mass spectrometer(HRMS) experiments.Moreover,Upon addition of 1 equiv.EDTA to the mixture of L and Cu2+ in DMSO solution,colour changed from pink to almost colourless,indicating that the EDTA replaced the receptor L to coordinate with Cu2+.Therefore,L could be classified as a reversible sensor for Cu2+.In addition,when adding Hg2+ to L-Cu2+ complexes,a visible change of solution from pink to colourless was observed,while other metal ions didn’t cause this change.Thus,L-Cu2+ complex also could be used for the naked eye recognition of Hg2+,and the detection limit was calculated about 2.9×10-7 mol·L-1 according to the UV titration.Consequently,this procedural sensor L could be use for the orderly naked eye recognition of Cu2+ and Hg2+.
    CAO Li, QIAN Ya-ao, HUANG Yan, CAO Juan, JIA Chun-man, LIU Chun-ling, ZHANG Qi, Lv Zheng-rong. Synthesis and Spectroscopic Study of a Chemosensor for Naked Eye Recognition of Cu2+ and Hg2+[J]. Spectroscopy and Spectral Analysis, 2015, 35(7): 1797
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