Details

Autor(en) / Beteiligte

• Wang, Bingzhe
• Zheng, Shushu
• Saha, Avishek
• Bao, Lipiao
• Lu, Xing
• Guldi, Dirk M

Titel

Understanding Charge-Transfer Characteristics in Crystalline Nanosheets of Fullerene/(Metallo)porphyrin Cocrystals

Ist Teil von

• Journal of the American Chemical Society, 2017-08, Vol.139 (30), p.10578-10584

Ort / Verlag

United States: American Chemical Society

Erscheinungsjahr

2017

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Cocrystals in the form of crystalline nanosheets comprised of C70 and (metallo)­porphyrins were prepared by using the liquid–liquid interfacial precipitation (LLIP) method where full control over the morphologies in the C70/(metallo)­porphyrins nanosheets has been accomplished by changing the solvent and the relative molar ratio of fullerene to (metallo)­porphyrin. Importantly, the synergy of integrating C70 and (metallo)­porphyrins as electron acceptors and donors, respectively, into nanosheets is substantiated in the form of a near-infrared charge-transfer absorption. The presence of the latter, as reflection of ground-state electron donor–acceptor interactions in the nanosheets, in which a sizable redistribution of charge density from the electron-donating (metallo)­porphyrins to the electron-accepting C70 occurs, leads to a quantitative quenching of the localized (metallo)­porphyrin fluorescence. Going beyond the ground-state characterization, excited-state electron donor–acceptor interactions are the preclusion to a full charge transfer featuring formation of a radical ion pair state, that is, the one-electron reduced fullerene and the one-electron oxidized (metallo)­porphyrin.