|
KMID : 1024520040130040435
|
|
Journal of the Environmental Sciences
2004 Volume.13 No. 4 p.435 ~ p.440
|
|
|
Synthesis of Ligands Containing Thiophene- or Furan- groups and Determination of Stability Constants of Chelating Compounds for Removal of Heavy Metals (Cd[2+], Pd[2+], Zn[2+], Cu[2+]) in Aqueous Solution
|
|
Kim Jun-Gwang
Kim Jung-Sung
|
|
|
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) and stability constants (logK for Cd, Pb, and Cu 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.
|
|
|
KEYWORD
|
|
|
Potentiometry, Stability constants, Thiophene, Pyridyl
|
|
|
FullTexts / Linksout information
|
|
|
|
|
|
Listed journal information
|
|
|
|