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首页> 中文期刊> 《结构化学》 >Synthesis, Crystal Structure and DNA-Binding Property of a Mn(Ⅱ) Complex Based on 5-(Trifluoromethyl)pyridine-2-carboxylic Acid

Synthesis, Crystal Structure and DNA-Binding Property of a Mn(Ⅱ) Complex Based on 5-(Trifluoromethyl)pyridine-2-carboxylic Acid

         
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摘要

A new complex Mn(Htpc)2(H2O)2 (1,Htpc =5-(trifluoromethyl)pyridine-2-carboxylic acid) has been synthesized and characterized by elemental analysis,IR,TG and single-crystal X-ray diffraction.1 belongs to triclinic system,space group P(1) with a =5.0885(10),b =6.5574(13),c =14.016(3) (A),β =90.67(3)°,V=436.34(17) (A)3,Z =1,Dc =1.793 g·cm3,μ =0.855 mm-1,Mπ =471.18,F(000) =235,the final R =0.0454 and wR-0.1134 for 1998 observed reflections with I ＞ 2σ(1).The Mn(Ⅱ) ion is coordinated by two N and two O atoms from two Htpc as well as two O atoms from two coordinated water molecules,forming a 0D motif with distorted octahedral coordinate geometry.The adjacent 0D units are linked into 1D chains through hydrogen bond O(1W)-H(1WB)…O(2),and via the O(1W)-H(1WA)· O(1) hydrogen bond the neighboring 1D chains are connected into a 2D supramolecular layer.Moreover,the interactions between the ligand and its complex with CT-DNA were studied by EtBr fluorescence probe,which suggested that these compounds bind to CT-DNA through an intercalation mode.The binding constants were 0.41 and 0.64 for Htpc and complex 1,respectively.It indicates that the interaction between complex 1 and CT-DNA is stronger than Htpc.

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  • 来源
    《结构化学》 |2019年第8期|1349-1355|共7页
  • 作者

    WANG Jia-Kai; LI Bing; WU Huan-Ping; TIAN Xiao-Yan; MA Xiao-Xia;

  • 作者单位

    Department of Chemistry and Chemical Engineering;

    Ningxia University;

    Yinchuan 750021;

    China;

    Department of Chemistry and Chemical Engineering;

    Ningxia University;

    Yinchuan 750021;

    China;

    Department of Chemistry and Chemical Engineering;

    Ningxia University;

    Yinchuan 750021;

    China;

    Department of Chemistry and Chemical Engineering;

    Ningxia University;

    Yinchuan 750021;

    China;

    Department of Chemistry and Chemical Engineering;

    Ningxia University;

    Yinchuan 750021;

    China;

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