Acta Phys. -Chim. Sin. ›› 2008, Vol. 24 ›› Issue (06): 1068-1072.doi: 10.3866/PKU.WHXB20080627

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Interaction of 1,4,8,9-Tetraazatriphenylene-Copper (II)-L-Serinate (L-Argininate) Complexes with DNA

GU Qin; REN Xiang-Xiang; LE Xue-Yi   

  1. Department of Applied Chemistry, College of Sciences, South China Agricultural University, Guangzhou 510642, P. R. China
  • Received:2007-12-24 Revised:2008-02-27 Published:2008-06-03
  • Contact: LE Xue-Yi

Abstract: Interactions of ternary Cu(II) complexes [Cu(TATP)(L-Ser)(H2O)]·ClO4(1) and [Cu(TATP)(L-Arg) (H2O)]2ClO4·0.5H2O (2) (TATP=1,4,8,9-tetraazatriphenylene, L-Ser=L-serinate, L-Arg=L-argininate) with DNA have been investigated by electronic absorption spectroscopy, fluorescence spectroscopy, viscosity, and gel electrophoresis measurements. The intensity of maximal absorption peaks of absorption spectra of the complexes was weakened with the increase in DNA concentration, and the complexes could remarkably quench the emission intensity of ethidium bromide (EB)-DNA system. At the same time, the viscosity of DNA decreased with the increase in the concentration of the complexes. The results indicated that the intercalative interaction of the complexes with DNA was strong and gave the order of the binding abilities of the complexes to DNA: complex 2>1. Moreover, the result of agarose gel electrophoresis showed that the complexes had high cleaving efficiency to pBR322 DNA in the presence of vitamin C.

Key words: Ternary copper (II) complex, 1,4,8,9-tetraazatriphenylene, L-α-amino acid, DNA


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