Photoinduced Electron Transfer on Aqueous Carbon Nanohorn–Pyrene–Tetrathiafulvalene Architectures

Abstract

Water-soluble carbon-nanohorn-tetrathiafulvalene (CNH-TTF) nanoensembles were prepared by utilizing positively charged pyrene as an assembly medium and characterized by spectroscopy and electron microscopy. Electronic interactions within the nanoensemble were probed by optical spectroscopy, indicating electron transfer between the TTF units and CNHs after light illumination.

Hydrogen peroxide biosensor based on direct electrochemistry of soybean peroxidase immobilized on single-walled carbon nanohorn modified electrode

“…1B), indicating that SBP has adsorbed onto SWCNH (Guan et al, 2005). The immobilization of SBP in SWCNHs matrix might be mainly based on physisorption and -stacking interactions (Pagona et al, 2006(Pagona et al, , 2007Cioffi et al, 2007).…”

Multifunctional Photo‐ and Redox‐Active Tetrathiafulvalene‐based Organogelators: A Modular Approach

“…The resulting donor-acceptor (D-A) dyad should, in principle, give rise to a quenching of the fluorescence supported by photoinduced electron or energy transfer from the p-donating TTF moiety (D) to the fluorescent accepting pyrene units (A). [11,22] At this stage, an important issue of this system lies in the possibility to modulate the donating ability of the TTF unit by oxidation to the cation-radical or dication states, leading, therefore, to the restoration (at least partial) of the fluorescence of A. Such a concept has been recently successively developed with the preparation of several TTF-based fluorescence switches.…”

Polymer Covalent Functionalization of Carbon Nanohorns Using Bulk Free Radical Polymerization

“…[6] Independent reports from our group and others, [7][8][9][10][11][12] focused on the covalent (either at the sidewalls or the conical tips) or noncovalent functionalization of CNHs, with low-molecular-weight organic compounds. Briefly, pyrrolidine-, [7] amine-, [8] aryl-, [9] and cyclopropane-functionalized [10] CNHs have been reported.…”

“…[11] Additionally, CNHs have been solubilized upon noncovalent p-p interactions with aromatic flat molecules such as pyrenes and porphyrins. [12] However, the polymer functionalization of CNHs has yet to be fully explored, as has been done for CNTs. [13] In particular, based on the grafting-to approach, only the covalent attachment of polyethylene oxide [14] and polyisoprene or polyisoprene-b-polystyrene [15] has been reported by our group.…”