Noncovalent porphyrin-functionalized single-walled carbon nanotubes in solution and the formation of porphyrin–nanotube nanocomposites

Carbon Nanotubes and Carbon Nanotubes/Metal Oxide Heterostructures: Synthesis, Characterization and Electrochemical Property

“…This approach uses the moderately strong interactions between delocalized π-electrons of CNTs and those in aromatic organic compounds, such as derivatives of pyrene [115][116][117], porphyrins [118][119][120], phthalocyanines [121], or combinations thereof [122], as well as benzyl www.intechopen.com Carbon Nanotubes and Carbon Naotubes/Metal Oxide Heterostructures: Synthesis, Characterization and Electrochemical Property 11 alcohol or triphenylphosphine (Fig. 4) [123].…”

“…One of the major advantages of this approach is that the pyrene compounds remain strongly adsorbed on the CNT surface after workup steps (e.g., washing, filtration) and thus provide enhanced solubility and allow continuous redispersing of the modified CNTs in various aqueous and organic solvents. Furthermore, spectroscopic experiments on CNT/Pt [125] and CNT/porphyrin hybrids [118,126] revealed an enhanced charge transfer from inorganic nanoparticles to the CNTs, mediated by the aromatic compound. This was also observed for attached Co and Fe 3 O 4 nanoparticles [124], whose magnetic and electronic properties were altered due to a strong electron transfer.…”

<i>β</i>-cyclodextrin Covalently Functionalized Single-Walled Carbon Nanotubes: Synthesis, Characterization and a Sensitive Biosensor Platform

“…Two strategies, including noncovalent and covalent modification, have been developed to modify the CNTs to overcome the solubility limitations [10][11][12][13][14][15][16]. In the cased of the noncovalent modification strategy, a rather limited surfactants and compounds with benzene ring or condensed aromatic ring are usually used to disperse the CNTs bundle.…”

Surface mounted porphyrin-nanotube arrays: Towards energy-harvesting surfaces

“…Such arrays have been created utilising covalent [27,28] and non-covalent [29] means, with the common observation of photoinduced electron transfer within the porphyrin-nanotube conjugate. To a lesser extent, photoinduced energy transfer has been observed [30].…”