Synthesis, characterization and evaluation of Pamam Dendrimer-Gold complex as an anion recognition material

Dendrimers are highly branched, monodisperse macromolecules and this field of study has increased rapidly from the time they were discovered about twenty years ago. In this study, PAMAM dendrimer was successfully synthesized by a divergent synthesis route using the reagent excess method starting fro...

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Main Author:	Abd. Malek, Muhammad Nor Fazli
Format:	Thesis
Language:	English
Published:	2009
Subjects:	QD Chemistry
Online Access:	http://eprints.utm.my/id/eprint/12401/1/MuhammadNorFazliMFS2009.pdf
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id	my-utm-ep.12401
record_format	uketd_dc
spelling	my-utm-ep.124012018-06-04T09:54:00Z Synthesis, characterization and evaluation of Pamam Dendrimer-Gold complex as an anion recognition material 2009-09 Abd. Malek, Muhammad Nor Fazli QD Chemistry Dendrimers are highly branched, monodisperse macromolecules and this field of study has increased rapidly from the time they were discovered about twenty years ago. In this study, PAMAM dendrimer was successfully synthesized by a divergent synthesis route using the reagent excess method starting from ethylenediamine (EDA) followed by consecutive Michael addition and ester amidation reaction. Methanol was used as solvent and three dendrimer generations were prepared: G 1.0, G 2.0 and G 3.0. For preparation of PAMAM-thiol functionalized gold nanoparticle in-situ reduction of gold from Au 3+ to Au0 was achieved through the reaction of nanogold-thiol functionalized PAMAM dendrimer with sodium borohydrate (NaBH4). The PAMAM dendrimer-gold complex gave light purple solution and was characterized by H nucleus magnetic resonance (NMR), Fourier transform infrared (FT-IR), and ultraviolet-visible (UV-Vis) spectroscopies. Analysis of the UV-Vis spectral analysis of the PAMAM dendrimers showed that the wavelength maximum, Xmax significantly shifted from 330.15 nm to 517.28 nm with the addition of goldthiol nanoparticles due to binding of the thiol functional group to gold particles. Anion recognition ability of the PAMAM-thiol functionalized gold nanoparticle has been studied by treating the PAMAM dendrimer-gold complex with nitrate ion. Based on the UV-Vis spectra, the wavelength maximum of Au(III) was shifted from 526.98 nm to higher wavelength upon binding of the nitrate anion to the surfaces of gold-thiol nanoparticles which the process involved excitation of the electrons from n -> n. 2009-09 Thesis http://eprints.utm.my/id/eprint/12401/ http://eprints.utm.my/id/eprint/12401/1/MuhammadNorFazliMFS2009.pdf application/pdf en public masters Universiti Teknologi Malaysia, Faculty of Science Faculty of Science
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
language	English
topic	QD Chemistry
spellingShingle	QD Chemistry Abd. Malek, Muhammad Nor Fazli Synthesis, characterization and evaluation of Pamam Dendrimer-Gold complex as an anion recognition material
description	Dendrimers are highly branched, monodisperse macromolecules and this field of study has increased rapidly from the time they were discovered about twenty years ago. In this study, PAMAM dendrimer was successfully synthesized by a divergent synthesis route using the reagent excess method starting from ethylenediamine (EDA) followed by consecutive Michael addition and ester amidation reaction. Methanol was used as solvent and three dendrimer generations were prepared: G 1.0, G 2.0 and G 3.0. For preparation of PAMAM-thiol functionalized gold nanoparticle in-situ reduction of gold from Au 3+ to Au0 was achieved through the reaction of nanogold-thiol functionalized PAMAM dendrimer with sodium borohydrate (NaBH4). The PAMAM dendrimer-gold complex gave light purple solution and was characterized by H nucleus magnetic resonance (NMR), Fourier transform infrared (FT-IR), and ultraviolet-visible (UV-Vis) spectroscopies. Analysis of the UV-Vis spectral analysis of the PAMAM dendrimers showed that the wavelength maximum, Xmax significantly shifted from 330.15 nm to 517.28 nm with the addition of goldthiol nanoparticles due to binding of the thiol functional group to gold particles. Anion recognition ability of the PAMAM-thiol functionalized gold nanoparticle has been studied by treating the PAMAM dendrimer-gold complex with nitrate ion. Based on the UV-Vis spectra, the wavelength maximum of Au(III) was shifted from 526.98 nm to higher wavelength upon binding of the nitrate anion to the surfaces of gold-thiol nanoparticles which the process involved excitation of the electrons from n -> n.
format	Thesis
qualification_level	Master's degree
author	Abd. Malek, Muhammad Nor Fazli
author_facet	Abd. Malek, Muhammad Nor Fazli
author_sort	Abd. Malek, Muhammad Nor Fazli
title	Synthesis, characterization and evaluation of Pamam Dendrimer-Gold complex as an anion recognition material
title_short	Synthesis, characterization and evaluation of Pamam Dendrimer-Gold complex as an anion recognition material
title_full	Synthesis, characterization and evaluation of Pamam Dendrimer-Gold complex as an anion recognition material
title_fullStr	Synthesis, characterization and evaluation of Pamam Dendrimer-Gold complex as an anion recognition material
title_full_unstemmed	Synthesis, characterization and evaluation of Pamam Dendrimer-Gold complex as an anion recognition material
title_sort	synthesis, characterization and evaluation of pamam dendrimer-gold complex as an anion recognition material
granting_institution	Universiti Teknologi Malaysia, Faculty of Science
granting_department	Faculty of Science
publishDate	2009
url	http://eprints.utm.my/id/eprint/12401/1/MuhammadNorFazliMFS2009.pdf
_version_	1747814933226061824

Synthesis, characterization and evaluation of Pamam Dendrimer-Gold complex as an anion recognition material

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