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Immobilization of Ionophore and Surface Characterization Studies of the titanium(III) Ion in a PVC-membrane Sensor

Immobilization of Ionophore and Surface Characterization Studies of the titanium(III) Ion in a PVC-membrane Sensor

Majid Rezayi, Lee Yook Heng, Anuar Kassim, Saeid Ahmadzadeh, Yadollah Abdollahi, Hossein Jahangirian

Sensors (Basel). 2012;12(7):8806-14.

PMID: 23012518

Abstract:

Novel ionophores comprising various hydroxide and amine structures were immobilized onto poly(vinyl chloride) (PVC) matrices, and these were examined to determine Ti(III) selectivity. To predict the selectivity of Ti(III), a PVC membrane was used to investigate the binding of Ti(III) to c-methylcalix[4]resorcinarene (CMCR). The study showed that the chelating ligand, CMCR, was coordinated selectively to Ti(III) at eight coordination sites involving the oxygen atoms at the interface of the membrane/solution. The membrane was prepared, based on CMCR as an ionophore, sodium tetrakis(4-fluorophenyl) borate (NaTFPB) as a lipophilic ionic additive, and dioctylphthalate (DOP) as a plasticizer. The immobilization of the ionophore and surface characterization studies revealed that the performance of CMCR-immobilized PVC was equivalent to that of mobile ionophores in supported liquid membranes (SLMs). The strengths of the ion-ionophore (CMCR-Ti(OH)(OH(2))(5) (2+)) interactions and the role of ionophores on membranes were studied via UV-Vis, Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM) and and X-ray diffraction (XRD).

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP81686228	Sodium ionophore III		81686-22-8	Price

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