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

Sensors

Majid Rezayi¹  Lee Yook Heng¹  Anuar Kassim³  Saeid Ahmadzadeh³  Yadollah Abdollahi² 

[1] School of Chemical Sciences and Food Technology, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor D.E., Malaysia;Advanced Materials and Nanotechnology Laboratory, Institute of Advanced Technology Universiti Putra Malaysia, 43400 Serdang, Selangor D.E., Malaysia; E-Mail:;Department of Chemistry, Faculty of Sciences, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia; E-Mails:

关键词: ionophore-immobilized membrane;    titanium(III) cation;    c-methyl-calix[4]resorcinarene;    UV-Vis;    Fourier transform infrared spectroscopy;    scanning electron microscopy;    X-ray diffraction;   

DOI  :  10.3390/s120708806

来源: mdpi

【 摘 要 】

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)(OH₂)₅²⁺) 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).

【 授权许可】

CC BY   
© 2012 by the authors; licensee MDPI, Basel, Switzerland.