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Control of near infrared photoluminescence properties of single-walled carbon nanotubes by functionalization with dendrons

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Abstract

Single-walled carbon nanotubes (SWNTs) were functionalized by reacting them with sodium naphthalenide and dendrons to control their photoemission in the near-IR region. The functionalized SWNTs were characterized by absorption, Raman, and photoluminescence (PL) spectroscopy. The degree of functionalization of the SWNTs decreased with the increasing bulkiness of the dendrons used. After functionalization, new red-shifted PL peaks could be observed at ∼1110 Image ID:c8nr07983h-t1.gif and ∼1210 nm Image ID:c8nr07983h-t2.gif where the intensities were drastically enhanced by the thermal treatment. The relative peak intensity of Image ID:c8nr07983h-t3.gif to that of Image ID:c8nr07983h-t4.gif increased with the increasing bulkiness of the dendrons. Density functional theory (DFT) calculations of the functionalized SWNTs with dendrons suggest that the adducts with less bulky hydroalkylated substitution are stable in Clar structures and the addition positions predominantly determine the PL peak positions.

Graphical abstract: Control of near infrared photoluminescence properties of single-walled carbon nanotubes by functionalization with dendrons

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Publication details

The article was received on 01 Oct 2018, accepted on 10 Nov 2018 and first published on 13 Nov 2018


Article type: Paper
DOI: 10.1039/C8NR07983H
Citation: Nanoscale, 2018, Advance Article
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    Control of near infrared photoluminescence properties of single-walled carbon nanotubes by functionalization with dendrons

    Y. Maeda, Y. Konno, M. Yamada, P. Zhao, X. Zhao, M. Ehara and S. Nagase, Nanoscale, 2018, Advance Article , DOI: 10.1039/C8NR07983H

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