• Title/Summary/Keyword: Macrocycles

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Hg(II) ion- Selective Electrodes with Neutral Carriers of Macrocycles (거대고리 중성 운반체를 갖는 Hg(II)이온 선택성 전극)

  • 정오진
    • Journal of Environmental Science International
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    • v.5 no.2
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    • pp.211-220
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    • 1996

  • New thin-and diselena-crown ethers containing two suffer and selenium donor atoms have been prepared. And then, mercury ($Hg^{2+}$) ion-selective electrodes with PVC-plasticizer (STPB) based on some macrocycles as neutral carriers were also made. The electrochemical selectivities for various ions, and the effects for macrocycles, matrix of membranes, ratio of plasticizer to macrowcles, concentration and pH of test solution were investigated on the $Hg^{2+}$ ion-selective electrodes. The 1, 10-diselena-18-crown-6-PVC-STPB (sodium tetraphenylborate) exhibited good linear responses of ${28.2}\pm{0.6}$ decade-1 for $Hg^{2+}$ ion in the conientration ranges of $10^{-2}~10^{-6}$ M $Hg^{2+}$ ion. This electrode exhibited comparatively good selectivities for $Hg^{2+}$ ion in comparison with alkali and alkaline earth metal ions, some heavy metal ions and rare earth metal ion in the range of pH 2.5~6.0. In addition, this electrode was applied as a sensor in the titration of $Hg^{2+}$ ion with $1^-$ ion in water.

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Syntheses and Crystal Structures of Xylyl-Bridged NO2S2-Donor Macrocycles and Binuclear Mercury(II) Complex

  • Lee, Ji-Eun;Jin, Yong-ri;Seo, Joo-beom;Yoon, Il;Song, Mi-Ryoung;Lee, So-Young;Park, Ki-Min;Lee, Shim-Sung
    • Bulletin of the Korean Chemical Society
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    • v.27 no.2
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    • pp.203-207
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    • 2006

  • Isomeric series of dilinked $NO_2S_2$ macrocycles ($L^2$: para-, $L^3$: meta- and $L^4$: ortho-linked) capable of binuclear complexing ability were prepared from its monomeric analog $L^1$ in reasonable yields except ortho-type reaction, which led to mixture due to the formation of monomer-type macrocyclic quaternary ammonium bromide $L^5$. Moreover, L2 (as $2HNO_3$ form) and $L^5$ were confirmed by an X-ray crystallography. Reaction of $HgCl_2$ with $L^2$ yielded a binuclear complex $[Hg_2(L^2)Cl_4]$. In the complex, each mercury(II) has a distorted tetrahedral environment made up of S and N donors from an exodentate $L^2$ and two coordinated Cl atoms.

  • https://doi.org/10.5012/bkcs.2006.27.2.203 인용 PDF KSCI