Thermodynamic studies on complexation of divalent transition metal ions with some zwitterionic buffers for biochemical and physiological research |
| |
Institution: | 1. Department of Chemistry, Faculty of Science, Cairo University, Beni-Suef Branch, Beni-Suef, Egypt;2. Arabian Safety and Industrial security Center, Industrial Estate-Makkah Al-Mukaramah, Jeddah, Saudi Arabia;3. Geochemistry department, Faculty of Science, Al-Azhar University, Nasr City, Cairo, Egypt |
| |
Abstract: | The interaction between the zwitterionic buffers (3-N-bis(2-hydroxyethyl)amino]-2-hydroxy propane sulfonic acid, N-(2-actamido)-2-aminoethane sulfonic acid, and 3-(1,1-dimethyl-2-hydroxyethyl)amino]-2-hydroxy propane sulfonic acid) with some divalent transition metal ions (CuII, NiII, CoII, ZnII, and MnII) were studied at different temperatures (298.15 to 328.15) K at ionic strength I = 0.1 mol · dm?3 NaNO3 and in the presence of 10%, 30%, and 50% (w/w) dioxene by using potentiometry. The thermodynamic stability constants were calculated as well as the free energy change for the 1:1 binary complexation. The protonation constants of the zwitterionic buffers were also determined potentiometrically under the above conditions. |
| |
Keywords: | |
本文献已被 ScienceDirect 等数据库收录! |
|