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Synthesis and Characterization of Poly(amido amine) Dendrimer Containing Fluorene as a Core Chromophore

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Abstract:

The synthetic strategy for the convergent synthesis of emissive poly(amido amine) (PAMAM) dendrimers having the core chromophore via the copper-catalyzed 1,3-dipolar cycloaddition reaction between alkyne and azide was described. 2,7-Diazido-9H-fluorene, designed and synthesized to serve as the core in dendrimer, was stitched with the propargyl-functionalized PAMAM dendrons by the click chemistry leading to the formation of fluorescent PAMAM dendrimers in high yields. The absorption and emission of the dendrimers were investigated. Their photophysical studies indicated that 2,7-diazido-9H-fluorene showed no fluorescence due to the quenching effect from the electron-rich α-nitrogen of the azido group but the dendrimers fluoresced due to the elimination of the quenching through the formation of the triazole ring.

Keywords: 1,3-DIPOLAR CYCLOADDITION; CLICK CHEMISTRY; FLUORENE; PAMAM DENDRIMER

Document Type: Research Article

DOI: https://doi.org/10.1166/jnn.2008.IC59

Publication date: 2008-09-01

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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