• Title/Summary/Keyword: chemical binding

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Influence of pH on Chelation of BaCl2 and EDTA Using Isothermal Titration Calorimetry (등온적정열량계를 이용한 BaCl2와 EDTA 킬레이션 결합 반응의 pH 영향)

  • Ga Eun Yuk;Ji Woong Chang
    • Applied Chemistry for Engineering
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    • v.34 no.3
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    • pp.279-284
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    • 2023

  • Isothermal titration calorimetry (ITC) is a useful technique to obtain thermodynamic binding properties such as enthalpy, Gibbs free energy, entropy, and stoichiometry of the chelation reaction. A single independent binding site model was used to evaluate the thermodynamic binding properties in BaCl2 and ethylenediaminetetraacetic acid (EDTA) in Trince and HEPES buffers. ITC enables us to elucidate the binding mechanism and find an optimal chelation condition for BaCl2 and EDTA in the pH range of 7~11. Chelation of BaCl2 and EDTA is a spontaneous endothermic reaction. As pH increased, entropic contributions dominated. The optimal pH range is narrow around pH 9.0, where 1:1 binding between BaCl2 and EDTA occurs.

  • https://doi.org/10.14478/ace.2023.1043 인용 PDF

Nitrobenzene Functionalized Hexahomotrioxacalix[3]arene

  • Kang, Jong-Min;Cheong, Na-Young
    • Bulletin of the Korean Chemical Society
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    • v.23 no.7
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    • pp.995-997
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    • 2002

  • The synthesis and characterization of a nitrobenzene modified hexahomotrioxacalix[3]arene 1 are described.When calixarene 1 bound with ammonium ions carrying fluorescence group, the fluorescence of ammonium ions were effectively quenched and chang e of emission intensity provided the information of ammonium ion binding events to the calixarene 1.

  • https://doi.org/10.5012/bkcs.2002.23.7.995 인용 PDF KSCI