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Cu(II) complex-based fluorescence chemosensor for cyanide in aqueous media

机译:Cu(II)氰化物中的基于复合荧光化学传感器在含水培养基中

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摘要

A fluorescent quinazoline derivative, 6-(2,4-dihydroxyphenyl)-5,6-dihydrobenzoimidazo[1,2-c]quinazoline (H2L), was designed and synthesized. Its fluorescence could be quenched by the addition of Cu2+ in an aqueous media. The binding constant for Cu2+ and H2L was determined to be 9.56 x 10(3) M-2 in DMSO/H2O (1 : 1, v/v). The crystal structure of the Cu(II) complex, [Cu(HL1)(Ac)] (1) (H2L1 = 4-{[2-(1H-benzimidazol-2-yl)-phenylimino]-methyl}-benzene-1,3-diol, Ac = acetate), revealed that Schiff base complex 1, H2L1, was formed in the response system of H2L to Cu2+ via Cu2+-assisted C-N bond breakage of the quinazoline ring in H2L. Consequently, complex 1 was used as a turn-on fluorescence chemosensor for the direct detection of CN-, and showed a high selectivity to CN- over a number of anions in the aqueous media, where CN- replaces HL1 in 1 to form [Cu(CN)(x)](2-x) with HL1 then released and the fluorescence recovered. The detection limit for CN- was 4.0 x 10(-6) M. The cell images showed that 1 could be used to detect intracellular CN-.
机译:设计和合成了荧光喹唑啉衍生物,6-(2,4-二羟基苯基)-5,6-二氢苯甲酰胺(H 2L)。可以通过在水性介质中加入Cu 2+来淬灭其荧光。将Cu 2 +和H 2L的结合常数测定为DMSO / H 2 O(1:1,V / V)的9.56×10(3)m-2。 Cu(II)复合物的晶体结构,[Cu(HL1)(AC)](1)(H 2L1 = 4 - {[2-(1H-苯并咪唑-2-基) - 苯基咪唑酯 - 甲基} - 苯苯 - 1,3-二醇,Ac =乙酸盐,揭示了Schiff基络合物1,H 2L1,在H 2L的H 2L至Cu2 +的响应系统中形成喹唑啉环的Cu 2 + Cn键粘合。因此,将复合物1用作导通荧光化学传感器,用于直接检测CN-,并在水性介质中的许多阴离子上显示出高选择性,其中CN-取代1中的HL1形成[Cu (CN)(x)](2-x)用HL1释放并回收荧光。 CN-的检测限为4.0×10(-6)M.细胞图像显示1可用于检测细胞内CN-。

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  • 来源
    《RSC Advances》 |2015年第79期|共7页
  • 作者单位

    Beijing Normal Univ Coll Chem Beijing Key Lab Energy Convers &

    Storage Mat Beijing 100875 Peoples R China;

    Beijing Normal Univ Coll Chem Beijing Key Lab Energy Convers &

    Storage Mat Beijing 100875 Peoples R China;

    Beijing Normal Univ Coll Chem Beijing Key Lab Energy Convers &

    Storage Mat Beijing 100875 Peoples R China;

    Beijing Normal Univ Coll Chem Beijing Key Lab Energy Convers &

    Storage Mat Beijing 100875 Peoples R China;

    Beijing Normal Univ Coll Chem Beijing Key Lab Energy Convers &

    Storage Mat Beijing 100875 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
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