Thermal study of chelates of Co(II), Cu(II), Ni(II), Cr(III), Mo(III), and Fe(III) with bis(acetylacetone)ethylenediimine on activated silica gel surface |
| |
Authors: | Luiza N H Arakaki Josiane S Diniz A L P Silva Vera Lucia S Augusto Filha Maria G Fonseca J G P Espínola and T Arakaki |
| |
Institution: | (1) Department of Chemistry, Lanzhou University, Lanzhou, 730000, People’s Republic of China;(2) Shandong Lukang Pharmaceutical Company Limited, Jining, 272100, People’s Republic of China; |
| |
Abstract: | The divalent copper, nickel, cobalt and trivalent chromium, molybdenium and iron chelate compounds derived from bis(acetylacetone)
ethylenediimine were grafted on activated silica gel using a batch process in methanolic solution. The sequence of the maximum
retention capacity was Cr(III)>Mo(III)>Fe(III)>Co(II)>Ni(II)>Cu(II). Calorimetric titration was employed to study the interaction
of activated silica gel with these series of metal chelate compounds. Exothermic enthalpic results were obtained throughout
all interactions process. The spontaneity of these systems was reflected in negative and positive free Gibbs energy from entropic
values. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|