Details

Autor(en) / Beteiligte

• Pagona, Georgia
• Fan, Jing
• Maignè, Alan
• Yudasaka, Masako
• Iijima, Sumio
• Tagmatarchis, Nikos

Titel

Aqueous carbon nanohorn–pyrene–porphyrin nanoensembles: Controlling charge-transfer interactions

Ist Teil von

• Diamond and related materials, 2007-04, Vol.16 (4), p.1150-1153

Ort / Verlag

Amsterdam: Elsevier B.V

Erscheinungsjahr

2007

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• A combination of π–π stacking and electrostatic interactions was used to integrate an anionic porphyrin (H 2P 2−) with carbon nanohorns (CNHs), mediated by positively charged pyrene (pyr +) units. The resulting water-soluble CNHs–pyr +–H 2P 2− nanoensemble was characterized by optical spectroscopy and electron microscopy techniques. The strong fluorescence emission of H 2P 2− was significantly quenched by CNHs, suggesting effective energy and electron transfer between the photo-excited porphyrin and the extended π-electronic network of nanohorns. Blank experiments validated the supramolecular concept of synergistic electrostatic interactions and signified the importance of CNHs as electron acceptors towards the preparation of some novel donor-acceptor nanosystems.