[KSCI] Korea Science Citation Index Service

http://dx.doi.org/10.5322/JES.2004.13.4.435

Synthesis of Ligands Containing Thiophene- or Furan- groups and Determination of Stability Constants of Chelating Compounds for Removal of Heavy Metals (Cd²⁺,Pd²⁺,Zn²⁺,Cu²⁺) in Aqueous Solution

Kim, Jun Gwang (대구대학교 사범대학 과학교육학부)
Kim, Jeong Seong (대구대학교 사범대학 과학교육학부)

Publication Information

Journal of Environmental Science International / v.13, no.4, 2004 , pp. 435-440 More about this Journal

Abstract

The thiophene or furan-containing hexadentate ligands 1, 12-bis (2-theophene )-2,5,8,ll-tetraazadodecane(Thiotrien ㆍ 4HCl) and 1,12-bis (2-furan)-2,5,8,11-tetraazadodecane(Furatrienㆍ4HC1) were synthesized as their tetrahydrochloride salt and characterized by EA, IR, NMR, and Mass spectrum. Their protonation constants (logK $_{nH}$ ) and stability constants (logK $^{M}_{L}$ for Cd $^{2+}$ , Pb $^{2+}$ , $Zn^{2+}$ and Cu $^{2+}$ ions were determined in aqueous solution by potentiometry and compared with 1, 12-bis(2-pyridyl)-2,5,8, 11-tetra-azadodecane(Pytrien) of pyridyl-containing ligand. The effect stability constants of ligands and metal ion for removal of heavy metals in aqueous solution were described.

Keywords

Potentiometry; Stability constants; Thiophene; Pyridyl;

Citations & Related Records

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