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KMID : 1059519920360050652
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Journal of the Korean Chemical Society
1992 Volume.36 No. 5 p.652 ~ p.660
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Synthesis and Analytical Application of Chelating Resins Containing Polyamines
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Kim Sun-Deuk
Park Jung-eun
Park Myon-Yong
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Abstract
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The polyamine resins were synthesized by reacting amines such as diethylenetriamine(dien), triethylenetetramine(trien), tetraethylenepentamine(tetren), and pentaethylenehexamine(penten). Stepwise dissociation constants of amines, enthalpy and free energy of metal chelate were determined. Formation constants (log k1) of metal chelates were in order of Cu(Ⅱ) > Ni(Ⅱ) > Cd(Ⅱ) > Zn(Ⅱ) > Co(Ⅱ) and tendency of stabilities were proportional to nitrogen numbers of ligand such as dien < trien < tetren > penten. Elutional selectivites of metal ions on resin were agreed to formation constants of metal chelates. △H and △G were calculated by Van't Hoff equation. Stability constants (log k1) of metalic complexes were in order Cu(Ⅱ) > Ni(Ⅱ) > Cd(Ⅱ) > Zn(Ⅱ) > Co(Ⅱ), and tendency of stabilities were ⓟL-Dien < ⓟL-Trien < ⓟL-Tetren < ⓟL-Penten. The elutional selectivities of metal ions were agreed to stability constants of metal chelates.
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KEYWORD
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