Polysiloxane-Immobilized Triamine Ligand System,Synthesis and Applications |
| |
Authors: | Issa M El-Nahhal Basheer A El-Shetary Kamal A R Salib Nizam M El-Ashgar Ahmed M El-Hashash |
| |
Institution: | 1. Department of Chemistry , Al-Azhar University , PO Box 1277, Gaza, Palestine;2. Department of Chemistry, Faculty of Education , Ain Shams University , Egypt |
| |
Abstract: | The polysiloxane-immobilized triamine ligand system of the formula P-(CH 2 ) 3 NH(CH 2 ) 2 NH(CH 2 ) 2 NH 2 (where P represents the siloxane network) has been prepared via the sol-gel process by hydrolytic polycondensation of (EtO) 4 Si and (MeO) 3 Si(CH 2 ) 3 NH(CH 2 ) 2 NH(CH 2 ) 2 NH 2 . An alternative method was used by the reaction of the iodopolysiloxane P-(CH 2 ) 3 -I and diethylenetriamine in the presence of triethylamine. The immobilized triamine ligand forms metal chelate complexes when treated with aqueous metal(II) ion solutions (Co 2+ , Ni 2+ , and Cu 2+ ). The elemental analysis and FTIR results suggest that this ligand system undergoes a substantial leaching of diethylenetriamine ligand moieties from the siloxane framework. |
| |
Keywords: | Metal Uptake Polysiloxanes Polysiloxane-immobilized Ligand Systems Triamine Ligands |
|
|