Chinese Journal of Applied Chemistry ›› 2015, Vol. 32 ›› Issue (2): 171-176.DOI: 10.11944/j.issn.1000-0518.2015.02.140140

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Synthesis of Crown Ether Metal-prophyrin and Its Anion Recognition

GENG Xina, CHEN Caia, LI Guochenga, GAO Kanglia, DENG Zhaojinga, HAN Guozhib   

  1. aCollege of Science,Nanjing University of Technology,Nanjing 210009,China
    bState Key Laboratory of Molecular Electronics,Southeast University,Nanjing 210096,China
  • Received:2014-04-21 Revised:2014-07-09 Published:2015-02-10 Online:2015-02-10
  • Contact: Corresponding author:HAN Guozhi, associate professor; Tel/Fax:025-83587428; E-mail:han@njtech.edu.cn; Research interests:function materials chemistry
  • Supported by:

    Supported by Open Project of State Key Laboratory of Molecular Electronics, Southeast University(No.20111218)

Abstract:

A benzo-15-crown-5 modified 5-(4-carboxyphenyl)-10,15,20-triphenylporphyrin(1) was synthesized and used for binding with Hg2+ ion to form crown ether metal-prophyrin complex(3). UV-Vis and 1H NMR were used to investigate the formation and self-assembly of complex 3. The difference of 1H NMR spectra of complexes 3 and 2 reveals that a synergy effect of prophyrin and crown ether exists. The anion recognition and mechanism of complex 3 were also studied. After addition of NaNH2, an obvious red shift in the UV-Vis spectra was observed accompanied with a color change from green to chartreuse viewed by naked eye. At the same time, the chemical shift of —CH2— in crown ether ring shifted from 3.12 to 3.16 and 3.32 to 3.34, respectively. This phenomenon can be explained by the strong nucleophilic property of amino anion. However, addition of other sodium salts such as NaCl, NaH2PO4 and NaHCO3 could not result in the same phenomenon. This study provides a method for visible anion recognition.

 

Key words: crown ether, porphyrin, synthesis, anion, visible recognition

CLC Number: