Preparation of Cu Nanocomposites from EDA, DETA, and Jeffamine Cored PAMAM Dendrimers with TRIS and Carboxyl Surface Functional Groups

Abstract

This study presents the synthesis and UV-Vis characterization of Cu nanocomposites from ethylenediamine (EDA) (E), diethylenetriamine (DETA) (D), and Jeffamine® T-403 (P) cored PAMAM dendrimers (PAMAMs) with TRIS and carboxyl surface functional groups. Cu-PAMAM dendrimer encapsulated nanoparticles (Cu-DENs) were characterized by UV-Vis spectroscopy. Disappearance of the 680 nm d-d transition and 270-300 nm ligand to metal charge transfer (LMCT) peaks and the formation of monotically increasing exponential band were used as the evidence of the successful synthesis of Cu-DENs in addition to immediate color change of dendrimer-metal mixture solutions from blue to golden brown by reduction. Synthesized Cu-DENs could be facilitated as novel alternatives to the existing nanomaterials used in a wide range of applications involving bio and chemical sensors, catalysis, hydrogenations, oxidations, semiconductors, noble metals, magnetic dendrimer nanocomposites, environmental cleanup and many others.

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

“…In case of their prone-to-agglomerate in solution, stabilization of NPs is of great deal. Among various stabilizers such as surfactants (11), ligands, micelles and polymers (12,13), dendrimers are promising templates to synthesize numerous transition metal NPs such as Ag (14)(15)(16), Au (14,17), Cu (18,19), Ni (20), and Ru (21) with well-regulated size, position, and composition depending on their three-dimensional, monodisperse, unique architectures preventing them from nanoparticle growth, assembly, aggregation, and damage (22,23). Thus, the size and shape of the resulting dendrimer nanocomposites (DNCs) or dendrimerencapsulated metal nanoparticles (DENs), can remain steady so that a constant desired activity can be reached.…”