대한화학회지 (Journal of the Korean Chemical Society)

  • 제36권5호
  • /
  • Pages.652-660
  • /
  • 1992
  • /
  • 1017-2548(pISSN)
  • /
  • 2234-8530(eISSN)
대한화학회 (Korean Chemical Society)
권호 표지

폴리아민류를 작용기로 하는 킬레이트수지의 합성 및 분석적 응용

Synthesis and Analytical Application of Chelating Resins Containing Polyamines

  • 김선덕 (大邱大學校 自然科學大學 化學科) ;
  • 박정은 (大邱大學校 自然科學大學 化學科) ;
  • 박면용 (建國大學校 理科大學 化學科)
  • 발행 : 1992.10.20
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초록

폴리아민 리간드인 diethylenetriamine(dien), triethylenetetramine(trien), tetraethylenepentamine(tetren), 및 pentaethylenehexamine(penten)을 Chloromethylated Polystyrene $({\circledP}-) 수지에 반응시켜 각기 {\circledP}_L-Dien, {\circledP}_L-Trien, {\circledP}_L-Tetren 및 {\circledP}_L-Penten 수지를 합성한 후 Bjerrum법으로 pH를 측정하여 산해리상수 및 금속과의 안정도상수를 결정하였으며, Van't Hoff 식에 의해 {\Delta}H와 {\Delta}G도 구하였다. 이들 수지의 안정도상수(log k1)는 금속이온의 종류에 따라 Cu(Ⅱ) > Ni(Ⅱ) > Cd(Ⅱ) > Zn(Ⅱ) > Co(Ⅱ)의 순으로 감소하였으며, 수지중 주게 원자인 질소수가 증가함에 따라 {\circledP}_L-Dien < {\circledP}_L-Trien < {\circledP}_L-Tetren < {\circledP}_L-Penten의 순으로 증가하였다. 그리고 pH 변화에 대한 금속이온의 흡착량 및 분리도를 시험해 본 결과 이들 금속이온과의 안정도 상수값의 순서와 일치하였다.

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 k_1) 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. {\Delta}H and {\Delta}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 {\circledP}_L-Dien < {\circledP}_L-Trien < {\circledP}_L-Tetren < {\circledP}_L-Penten. The elutional selectivities of metal ions were agreed to stability constants of metal chelates.

키워드

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