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.
Highlights
Dendrimers are a new class of polymeric materials and cascade molecules with their spherical three-dimensional (3D) morphology, typically symmetric around a core
Results showed that PAMAM dendrimers (PAMAMs)-COOH dendrimers used in this study absorb the number of Cu2+ ions equivalent the number of tertiary amine numbers, and the structure of these dendrimers are at the desired monodipersity similar to those of PAMAM-tris(hydroxymethyl) aminomethane (TRIS) dendrimers, we reported in our recent study.[23]
Obtained end pointa aEach end point has been calculated as an average value of three experimental runs and see for the experimental values of PAMAMTRIS dendrimers.[23]
Summary
Dendrimers are a new class of polymeric materials and cascade molecules with their spherical three-dimensional (3D) morphology, typically symmetric around a core. The maximum number of Cu2+ ions, PAMAMs can complex and to be used in the synthesis of Cu-DENs, were determined via spectroscopic titrations.
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