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Incorporation of nano-particle sites in polymer matrix by Metal ion imprinting

Published online by Cambridge University Press:  10 February 2011

Alok Singh ,
Dhananjay Puranik ,
Yan Guo ,
Daniel Zabetakis  and
Eddie L. Chang
Alok Singh
Affiliation:
Laboratory for Molecular Interfacial Interactions, Code 6930, Naval Research Laboratory, Washington DC 20375, USA
Dhananjay Puranik
Affiliation:
Geo Centers Inc., 10903 Indian Head Hwy., Ft. Washington, MD 20744
Yan Guo
Affiliation:
Department of Biochemistry and Molecular Biology, Georgetown University, Washington DC 20007
Daniel Zabetakis
Affiliation:
Laboratory for Molecular Interfacial Interactions, Code 6930, Naval Research Laboratory, Washington DC 20375, USA
Eddie L. Chang
Affiliation:
Laboratory for Molecular Interfacial Interactions, Code 6930, Naval Research Laboratory, Washington DC 20375, USA
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Abstract

We present an approach for synthesizing polymer matrices that have been pre-organized to bind metal ions selectively. The acyclic chelator, triethylenetetramine, was modified to include a polymerizable functional group and then complexed with a target metal ion. Unlike macro cyclic ligands, the acyclic chelators have the flexibility to form chelation rings that are dependent on metal-ion size and geometry. Therefore, we have used the complexation step as a means to optimize the chelator conformation for a particular metal ion. The resulting complex was then cross linked with the matrix monomer, TRIM (2-ethyl-2-(hydroxymethyl)propane-1,3-diol trimethacrylate), to provide a rigid polymer matrix for stabilization of the conformation for the metal-ligand site. These sites were then tested for selectivity towards the imprinted metal ion. Unlike imprinting for larger molecules, the relatively smaller size of the metal ions facilitated their access to the imprinted sites embedded in the porous polymers. In addition to metal-binding applications, polymeric materials doped with metal nanoparticles and metal ions can exhibit interesting physical, chemical, optical and electronic properties.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 501: Symposium FF – Surface Controlled Nanoscale Materials for High-Added… , 1997 , 199
Copyright
Copyright © Materials Research Society 1998

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References

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