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Synthesis of s-Triazine Derivatives and Using as Colorimetric Probe for Selective Recognizing of Fe3+ and Cu2+

  • Zhang Hua ,
  • Liu Aihong ,
  • Wu Fangying
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  • Department of Chemistry, Nanchang University, Nanchang 330031

Received date: 2011-11-09

  Revised date: 2011-12-27

  Online published: 2012-02-14

Supported by

Project supported by the National Natural Science Foundation of China (No. 20965006).

Abstract

In this paper, two compounds of s-triazine derivatives which named 2,4-dimethyl-6-[(4'-N,N-dimethylamino) phenylethenyl]-1,3,5-s-triazine (1) and 2-styryl-4,6-dimethyl-1,3,5-triazine (2) were synthesized and characterized by 1H NMR, MS and elemental analysis. The interactions between the metal ions and compounds 1~3 were investigated by UV-vis spectroscopy. Results indicated that the absorption spectrum of compound 1 had a remarkable change when it combined with Fe3+ and Cu2+, and the maximum absorption peaks shifted from 393 nm to 525 nm and 513 nm, respectively. The models of compound 1 intergraded with Fe3+ and Cu2+ were 1∶1 and 2∶1, respectively, but with the same remarkable color change from yellow to pink by naked-eye colorimetric detection. The association constants of 1-Fe3+ and 1-Cu2+ were 1.8×104 L·mol-1 and 2.6×1010 L·mol-1 respectively. Meanwhile, the spectrum of compound 2 underwent distinct change when it combined with Fe3+ and the maximum absorption peak shifted from 304 nm to 357 nm. But less change was observed when it intergraded with Cu2+. The ratio of compound 2 intergraded with Fe3+ was 1∶1 and the association constants was 1.0×105 L·mol-1. Therefore, we could concluded that Fe3+ combined with the ring of triazine of the compounds 1 and 2, but the Cu2+ intergraded with N atom of the methylamino of the compound 1. At the same time, the interactions of compounds 1 and 2 with other ions such as Li+, K+, Mg2+, Ca2+, Co3+, Ni2+, Ag+, Cd2+, Hg2+and Zn2+ were also investi gated, but obvious absorption spectral changes was not observed. Thus a new kind chemosensor for Fe3+ and Cu2+with high selectivity and sensitivity was introduced.

Cite this article

Zhang Hua , Liu Aihong , Wu Fangying . Synthesis of s-Triazine Derivatives and Using as Colorimetric Probe for Selective Recognizing of Fe3+ and Cu2+[J]. Acta Chimica Sinica, 2012 , 70(08) : 1001 -1007 . DOI: 10.6023/A1111092

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