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Synthesis, characterization and applications of polysiloxane networks with immobilized pyrogallol ligands
Author(s) -
Saadeh Salman M.,
ElAshgar Nizam M.,
ElNahhal Issa M.,
Chehimi Mohamed M.,
Maquet Jocelyne,
Babonneau Florence
Publication year - 2005
Publication title -
applied organometallic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 71
eISSN - 1099-0739
pISSN - 0268-2605
DOI - 10.1002/aoc.888
Subject(s) - pyrogallol , chemistry , siloxane , ligand (biochemistry) , polymer chemistry , metal , x ray photoelectron spectroscopy , inorganic chemistry , nuclear chemistry , organic chemistry , chemical engineering , polymer , biochemistry , receptor , engineering
A porous, solid insoluble polysiloxane‐immobilized ligand system bearing pyrogallol active sites of the general formula P(CH 2 ) 3 NH(CH 2 ) 3 OC 6 H 3 (OH) 2 (where P represents [SiO] n siloxane network) has been prepared by the reaction of 3‐aminopropylpolysiloxane with 1,3‐dibromopropane followed by the reaction with pyrogallol. 13 C CP‐MAS NMR and X‐ray photoelectron spectroscopy confirmed that the pyrogallol is chemically bonded to the siloxane backbone. Thermal analysis showed that the ligand system is stable under nitrogen at relatively high temperature. The polysiloxane–pyrogallol ligand system exhibits high potential for the uptake of the metal ions (Fe 3+ , Co 2+ , Ni 2+ and Cu 2+ ). Complexation of the pyrogallol ligand system for the metal ions at the optimum conditions was found to be in the order Fe 3+ > Cu 2+ > Ni 2+ > Co 2+ . Copyright © 2005 John Wiley & Sons, Ltd.