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Please use this identifier to cite or link to this item: http://hdl.handle.net/2262/39161

Title: Functionalization of Single Walled Carbon Nanotubes with Optically Switchable Spiropyrans
Author: DEL CANTO, ELISA
FLAVIN, KEVIN
PEROVA, TATIANA
GIORDANI, SILVIA
NATALI, MANUEL
Sponsor: Science Foundation Ireland
Author's Homepage: http://people.tcd.ie/perovat
http://people.tcd.ie/kflavin
http://people.tcd.ie/giordans
Keywords: nanotubes
Issue Date: 2010
Citation: Elisa Del Canto, Kevin Flavin, Manuel Natali, Tatiana Perova and Silvia Giordani, Functionalization of Single Walled Carbon Nanotubes with Optically Switchable Spiropyrans, Carbon, 48, 10, 2010, 2815-2824
Series/Report no.: Carbon
48
10
Abstract: The design, synthesis and complete characterization of a smart material composed of single-walled nanotubes functionalized with spiropyran-based photo switchable molecules are reported. The chemical complexity of the system requires the use of a range of complementary techniques in order to provide a complete picture of the composition and performance of the nanomaterial. Thermal gravimetric analysis ensured both the high degree of chemical functionalization and the presence of molecular switches in the nanotube sample; micro-Raman indirectly confirmed the successful oxidation of the tubes, FT-IR proved the nature of the functional groups introduced based on their characteristic stretching vibrations and atomic force microscopy demonstrated nanotube lengths of approximately 600 nm. UV-Vis-NIR absorption spectroscopy was used to evaluate the photoresponsive behaviour of the nanomaterial, and the intensity of the absorption band at 556 nm could be modulated by light-induced reversible conversion of the spiropyran molecules attached to the SWCNT from the spiro close conformation to the merocyanine open form. We were also able to provide the first example of a continuous solution based on-off switching in a spiropyran-nanotube material.
Description: PUBLISHED
URI: http://hdl.handle.net/2262/39161
Appears in Collections:Chemistry (Scholarly Publications)

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