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Interaction of Aromatic Derivatives with Single-Walled Carbon Nanotubes

✍ Scribed by Wei-Chun Hung; Dr. Gracy Elias; Prof. Dr. Chien M. Wai


Publisher
John Wiley and Sons
Year
2010
Tongue
English
Weight
713 KB
Volume
11
Category
Article
ISSN
1439-4235

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✦ Synopsis


Abstract

Fluorescence of semiconducting single‐walled carbon nanotubes (SWNTs) normally exhibits diameter‐dependent oxidative quenching behaviour. This behaviour can be changed substantially to become an almost diameter‐independent quenching phenomenon in the presence of electron‐withdrawing nitroaromatic compounds, including o__‐nitrotoluene, 2,4‐dinitrotoluene, and nitrobenzene. This change is observed for SWNTs suspended either in sodium dodecyl sulfate or in Nafion upon titration with hydrogen peroxide. Benzene, toluene, phenol, and nitromethane do not show such change. These findings suggest the possibility of forming an electron donor–acceptor complex between SWNTs and nitroaromatic compounds, resulting in leveling the redox potential of different SWNT species. The observation appears to provide a new method for modifying the electrochemical potentials of SWNTs through donor–acceptor complex formation.__


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