Reacting soluble single-walled carbon nanotubes with singlet oxygen

Hamon, Mark A.; Stensaas, Kristina L.; Sugar, Miles A.; Tumminello, Katherine C.; Allred, Anna K.

doi:10.1016/j.cplett.2007.08.079

Cited by 27 publications

(37 citation statements)

References 27 publications

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“…39 The two peaks at 1095 and 1042 cm −1 are attributed to C-O stretching modes. 40 Among these FT-IR peaks, the carboxylic acid groups corresponding to the 1725 cm −1 peak are essential functional groups that are related to TiO 2 sol adsorption onto CNTs. The 1634 cm −1 peak can contribute to TiO 2 sol adsorption onto CNTs if the reaction is with the hydroxyl groups.…”

Section: Oxidation Of Mwcntsmentioning

confidence: 99%

Multiwall Carbon Nanotube and TiO<SUB>2</SUB> Sol Assembly

Qian

Lu²

2009

J. Nanosci. Nanotech.

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Carbon nanotube and TiO2 assemblies (CNT/TiO2) have the great promise of combining the advantages of CNTs and TiO2 as photocatalytic and energy conversion materials. In this study, nanoscale TiO2 sol was assembled onto multiwall carbon nanotubes (MWCNTs). The CNT/TiO2 sol assemblies were characterized by transmission electron microscopy, energy dispersive spectroscopy, and Fourier transform infrared spectroscopy. The study shows that the acidic functional group concentration on CNT surfaces increases with surface modification temperature, up to 1.179 mmol/g. Higher concentration of acidic functional group greatly improves the amount of TiO2 sol assembled onto MWCNTs. Higher TiO2 sol concentration also improves the amount of TiO2 sol assembled onto MWCNT surfaces. The assembly mechanism is mainly by chemical reaction between the -COOH groups of MWCNTs and the -OH groups of TiO2 sol by esterification.

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Section: Oxidation Of Mwcntsmentioning

confidence: 99%

Multiwall Carbon Nanotube and TiO<SUB>2</SUB> Sol Assembly

Qian

Lu²

2009

J. Nanosci. Nanotech.

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“…Blanchet et al functionalized CNTs with fluorinated olefins through [2+2] cycloaddition. [44] Theoretical studies indicate that 1 O 2 can react with the walls of SWNTs by means of a [4+2] or [2+2] cycloaddition reaction. Two separate [2+2] cycloaddition reactions of SWNTs with perfluoro-2-(2-flurosulfonylethoxy) propyl vinyl ether and with per fluoro (5-methyl-3, 6-dioxanon-1-ene) were accomplished successfully.…”

Section: A C H T U N G T R E N N U N G [2+2] Cycloaddition Reaction Fmentioning

confidence: 99%

“…CNTs oxidized with singlet oxygen ( 1 D g ) give reversible covalent addition of oxygen to the walls of the nanotubes by [2+2] cycloaddition. [44] Theoretical studies indicate that 1 O 2 can react with the walls of SWNTs by means of a [4+2] or [2+2] cycloaddition reaction. [45] Due to their electronic structure, metallic SWNTs are more nucleophilic than semiconducting SWNTs, and hence the possibility of selective oxidation of metallic SWNTs over semiconducting SWNTs is higher.…”

Section: A C H T U N G T R E N N U N G [2+2] Cycloaddition Reaction Fmentioning

confidence: 99%

Cycloaddition Reactions: A Controlled Approach for Carbon Nanotube Functionalization

Kumar

Rana

Cho

2011

Chemistry A European J

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Controlled functionalization of carbon nanotubes (CNTs) through the use of cycloaddition reactions is described. By employing various cycloaddition reactions, a wide range of molecules could be coupled onto CNTs without disruption of the structural integrity as well as with a statistical distribution of functional groups onto the surface of the CNTs. The cycloaddition reactions represent an effective and tailored approach for preparing CNT-based advanced hybrid materials that would be useful for a wide range of applications from nanobiotechnology to nanoelectronics.

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“…In 2007, a report on single-walled carbon nanotubes (SWCNTs) described the reaction with singlet oxygen [66]. Purification was simplified due to the contrasting solubility properties of unfunctionalized and oxyfunctionalized SWCNTs, although it was uncertain whether the SWCNT peroxides were formed from a [2 þ 2]-cycloaddition, a [2 þ 4]-cycloaddition, or both [66].…”

Section: Anthracenes Polyacenes and Carbon Nanotubesmentioning

confidence: 99%

“…Purification was simplified due to the contrasting solubility properties of unfunctionalized and oxyfunctionalized SWCNTs, although it was uncertain whether the SWCNT peroxides were formed from a [2 þ 2]-cycloaddition, a [2 þ 4]-cycloaddition, or both [66]. Subsequent reports found SWCNTs to be of very low chemical reactivity with 1 O 2 [67,68].…”

Section: Anthracenes Polyacenes and Carbon Nanotubesmentioning

confidence: 99%