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Efficient Amphiphilic Poly(propyleneimine) Dendrimer Stabilized Gold Nanoparticle Catalysts for Aqueous Phase Reduction of Nitrobenzene

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A well balanced amphiphilic poly(propyleneimine) dendrimer (APPI-G2) was synthesized and used as an effective template for the stabilization of gold nanoparticle (AuNPs). The APPI-G2 served as a stabilizing as well as reducing agent for AuNPs. The APPI-G2 stabilized AuNPs (APPI-G2-AuNPs) were characterized by UV-visible spectroscopy (UV-Vis) and transmission electron microscopy (TEM). The size of the AuNPs was in the range of 7 to 16 nm and their growth during the synthesis showed splitting of surface plasmon resonance band. Further, APPI-G2-AuNPs were also prepared by varying the APPI-G2 concentration keeping [Au3+] constant and vice-versa to examine the stabilization efficiency of APPI-G2. The APPI-G2 stabilized more than 5 × 10–6 M of AuNPs. The prepared catalysts were found to exhibit enhanced catalytic activity towards the reduction of nitrobenzene in aqueous medium and the reaction rate constant was estimated to be 26.31 × 10–3 s–1.
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Keywords: DENDRIMER; HOMOGENEOUS CATALYSIS; NITROBENZENE; POLY(PROPYLENEIMINE); REDUCTION

Document Type: Research Article

Publication date: November 1, 2012

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  • Science of Advanced Materials (SAM) is an interdisciplinary peer-reviewed journal consolidating research activities in all aspects of advanced materials in the fields of science, engineering and medicine into a single and unique reference source. SAM provides the means for materials scientists, chemists, physicists, biologists, engineers, ceramicists, metallurgists, theoreticians and technocrats to publish original research articles as reviews with author's photo and short biography, full research articles and communications of important new scientific and technological findings, encompassing the fundamental and applied research in all latest aspects of advanced materials.
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