Synthesis and Characterization of Jeffamine Core PAMAM Dendrimer-Silver Nanocomposites (Ag JCPDNCs) and Their Evaluation in The Reduction of 4-Nitrophenol

Year 2018, Volume: 5 Issue: 2, 885 - 894, 01.01.2018

Mustafa Ulvi Gürbüz , Ali Serol Ertürk

https://doi.org/10.18596/jotcsa.428572

Cited By: 10

Abstract

This paper presents the synthesis,
characterization and catalytic evaluation of Jeffamine core PAMAM
dendrimer-silver nanocomposites (Ag JCPDNCs). Generation-4 Jeffamine core PAMAM
dendrimer (JCPD or P4.NH₂) was used as the stabilizing templating
agent for the synthesis of Ag-JCPDNCs. Characterization of the synthesized Ag
JCPDNC was performed by UV visible (UV-Vis) spectroscopy and high resolution
transmission electron microscopy (HRTEM). The catalytic activity of dendrimer
nanocomposite (DNC) was assessed on the reduction of 4-nitrophenol (4-NP) to 4
aminophenol (4-AMP) in the presence of sodium borohydride (NaBH₄) as
reducing agent by monitoring the conversion at λ 400 nm. The prepared Ag
JCPDNCs displayed a good catalytic activity (K = 0.12 x 10^-2 s^-1)
for the model reduction reaction of 4-NP with the particle size distribution of
4.72 ± 0.81 nm, which offer
a mixed type (interior and exterior) of DNC formation. The Ag JCPDNCs can be a
valid complete alternative to their existing candidates in the literature with
their different polymeric organics components and be great potential for the
future studies as new materials.

Keywords

Poly (amidoamine) Dendrimers (PAMAMs), Dendrimer Nanocomposite (DNC), Jeffamine, 4-nitrophenol, Kinetic

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