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

作者：Wang, Bingzhe; Zheng, Shushu; Saha, Avishek; Bao, Lipiao; Lu, Xing^*; Gudi, Dirk M.^*

来源：Journal of the American Chemical Society, 2017, 139(30): 10578-10584.

DOI：10.1021/jacs.7b06162

• PHOTOINDUCED ELECTRON-TRANSFER
• FULLERENE C-60
• SUPRAMOLECULAR SYSTEMS
• LATTICE STRUCTURE
• C-70
• COMPLEXES
• NANOTUBES
• NANORODS
• GROWTH
• ENERGY

Cocrystals in the form of crystalline nanosheets comprised of C-70 and (metallo)porphyrins were prepared by using the liquid liquid interfacial precipitation (LLIP) method where full control over the morphologies in the C-70/(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 C-70 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 (inetallo)porphyrins to the electron-accepting C-70 occurs, leads to a quantitative quenching of the localized (inetallo)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.

• 出版日期2017-8-2
• 单位华中科技大学