XPS, NMR and FTIR structural characterization of polysiloxane-immobilized amine ligand systems

Metal ion adsorption using polyamine-functionalized mesoporous materials prepared from bromopropyl-functionalized mesoporous silica

“…The adsorption rate was found to be first order and the rate constants for the adsorption for the three metal ions, Cu 2+ , Zn 2+ , and Cd 2+ , were 0.028, 0.019, and 0.014 min −1 , respectively. These rates are faster than those reported by El Nahhal et al [32] for a similar mesoporous silica derivative, a phenomenon that can be attributed to the higher surface area and larger pore size of the material used in this investigation.…”

“…These mesoporous inorganic-organic systems exhibit great potential in the extraction, recovery, and separation of metal ions from aqueous solution and as supported ligands for catalysis. Recently, high resolution solid-state nuclear magnetic resonance (NMR) techniques [31] and other chemical tools [17,32] have been used to examine their structural properties. Although the diamine ligand system has been known for some time and its structure is now well established [31], there is a need for studying its metal binding chemistry in some detail.…”

Preconcentration using diethylenetriaminetetraacetic acid-functionalized polysiloxane (DETAP) for determination of molybdenum(VI) in seawater by ICP?OES

“…low Lewis acidity and a rather nonpolar Si-C bond [25]. On the other hand, the hydrolysis of siloxane networks (Si-O-Si bond) produces a leaching solution of polysiloxane [26]. The spectrum of leached material (Fig.…”

A review on polysiloxane-immobilized ligand systems: Synthesis, characterization and applications

“…Different applications based on the prepared polysiloxanes have been studied, e.g. preconcentration, extraction and separation of metal ions from aqueous solutions [99][100][101][102][103][104][105][106][107][108][109][110][111][112][113][114][115][116]. …”

“…Generally, all the immobilized amine ligand systems undergo substantial degradation upon treatment with acidic and basic solutions [39,45,46,100]. It is found that small oligomer species of the amine ligand containing groups are oozed out under acidic treatment [99].…”