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Charge-transfer interactions between fullerenes and a mesoporous tetrathiafulvalene-based metal–organic framework

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 betwe...

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Detalles Bibliográficos
Autores principales: Souto, Manuel, Calbo, Joaquín, Mañas-Valero, Samuel, Walsh, Aron, Mínguez Espallargas, Guillermo
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Beilstein-Institut 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6774073/
https://www.ncbi.nlm.nih.gov/pubmed/31598454
http://dx.doi.org/10.3762/bjnano.10.183
Descripción
Sumario: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.