Journal
BEILSTEIN JOURNAL OF NANOTECHNOLOGY
Volume 10, Issue -, Pages 1883-1893Publisher
BEILSTEIN-INSTITUT
DOI: 10.3762/bjnano.10.183
Keywords
charge transfer; donor-acceptor; fullerene; metal-organic frameworks (MOFs); tetrathiafulvalene (TTF)
Funding
- European Union [ERC-2016-CoG 724681-S-CAGE]
- Spanish MICINN [CTQ2017-89528-P]
- MICINN for a Ramon y Cajal fellowship
- Juan de la Cierva-Formacion fellowship
- Generalitat Valenciana [APOSTD/2017/081]
- EPSRC [EP/L000202]
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The design of metal-organic frameworks (MOFs) incorporating electroactive guest molecules in the pores has become a subject of great interest in order to obtain additional electrical functionalities within the framework while maintaining porosity. Understanding the charge-transfer (CT) process between the framework and the guest molecules is a crucial step towards the design of new electroactive MOFs. Herein, we present the encapsulation of fullerenes (C-60) in a mesoporous tetrathiafulvalene (TTF)-based MOF. The CT process between the electron-acceptor C-60 guest and the electron-donor TTF ligand is studied in detail by means of different spectroscopic techniques and density functional theory (DFT) calculations. Importantly, gas sorption measurements demonstrate that sorption capacity is maintained after encapsulation of fullerenes, whereas the electrical conductivity is increased by two orders of magnitude due to the CT interactions between C-60 and the TTF-based framework.
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