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Synthesis of Imprinted Polysiloxanes for Immobilization of Metal ions

Published online by Cambridge University Press:  10 September 2014

Adnan Mujahid ,
Faisal Amin ,
Tajamal Hussain ,
Naseer Iqbal ,
Asma Tufail Shah  and
Adeel Afzal
Adnan Mujahid*
Affiliation:
Institute of Chemistry, University of the Punjab, Quaid-i-Azam Campus Lahore-54590, Pakistan
Faisal Amin
Affiliation:
Institute of Chemistry, University of the Punjab, Quaid-i-Azam Campus Lahore-54590, Pakistan
Tajamal Hussain
Affiliation:
Institute of Chemistry, University of the Punjab, Quaid-i-Azam Campus Lahore-54590, Pakistan
Naseer Iqbal
Affiliation:
Interdisciplinary Research Centre in Biomedical Materials, COMSATS Institute of Information Technology, Defence Road, Off. Raiwind Road, Lahore 54000, Pakistan Department of Biosciences, COMSATS Institute of Information Technology, Park Road ,Chak Shahzad,Islamabad 45600, Pakistan
Asma Tufail Shah
Affiliation:
Interdisciplinary Research Centre in Biomedical Materials, COMSATS Institute of Information Technology, Defence Road, Off. Raiwind Road, Lahore 54000, Pakistan
Adeel Afzal
Affiliation:
Interdisciplinary Research Centre in Biomedical Materials, COMSATS Institute of Information Technology, Defence Road, Off. Raiwind Road, Lahore 54000, Pakistan Affiliated Colleges at Hafr Al-Batin, King Fahd University of Petroleum and Minerals, P.O. Box 1803, 31991 Hafr Al-Batin, Saudi Arabia
*
*Email address: [email protected] Tel.: +92-42-99230463
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Abstract

Imprinting is a well-established technique to induce recognition features in both organic and inorganic materials for a variety of target analytes. In this study, ion imprinted polysiloxanes with varying percentage of coupling agent i.e. 3-chloro propyl trimethoxy silane (CPTM) were synthesized by sol-gel method for imprinting of Cr3+. The imprinting of Cr3+ in cross-linked siloxane network was investigated by FT-IR which indicates the metal ion is coordinated with oxygen atoms of polysiloxanes. SEM images revealed that imprinted polysiloxanes possess uniform particles of submicron size. It was experienced that by increasing the concentration of CPTM up to 10% (v/v) substantially improves the binding capacity of polysiloxanes which allows us to recognized Cr3+ down to 50µg/L. Furthermore, the selectivity of Cr3+-imprinted polysiloxanes was evaluated by treating them with other competing metal ions of same concentration i.e. Cr6+, Pb2+ and Ni2+. In this regard, polysiloxanes showed much higher binding for imprint ion i.e. Cr3+ in comparison to above mentioned metal ions. Finally, the regenerated polysiloxanes were studied in order to reuse them thus, developing cost effective biomimetic sensor coatings.

Keywords

adsorptionCrsol-gel
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1675: Symposium K/RR – Synthesis, Characterization and Applications of Functional Materials—Thin Films and Nanostructures , 2014 , pp. 209 - 214
Copyright
Copyright © Materials Research Society 2014 

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