Mixed Ionic and Electronic Conductivity in a Tetrathiafulvalene-Phosphonate Metal–Organic Framework
Mixed ionic-electronic conductors have great potential as materials for energy storage applications. However, despite their promising properties, only a handful of metal-organic frameworks (MOFs) provide efficient pathways for both ion and electron transport. This work reports a proton-electron dual-conductive MOF based on tetrathiafulvalene(TTF)-phosphonate linkers and lanthanum ions. The formation of regular, partially oxidized TTF stacks with short S···S interactions facilitates electron transport via a hopping mechanism, reporting a room-temperature conductivity of 7.2 × 10<sup>-6</sup> S cm<sup>-1</sup>. Additionally, the material exhibits a proton conductivity of 4.9 × 10<sup>-5</sup> S cm<sup>-1</sup> at 95% relative humidity conditions due to the presence of free -POH groups, enabling efficient proton transport pathways. These results demonstrate the potential of integrating electroactive building blocks along with phosphonate groups toward the development of mixed ionic-electronic conductors.
Authors
- Bowen Tan (ORCID: https://orcid.org/0000-0002-5166-1541)
- João Rocha (ORCID: https://orcid.org/0000-0002-0417-9402)
- Filipe A. Almeida Paz (ORCID: https://orcid.org/0000-0003-2051-5645)
- Paula Escamilla (ORCID: https://orcid.org/0000-0002-6419-8891)
- Manuel Souto (ORCID: https://orcid.org/0000-0003-3491-6984)
- Mircea Dincă (ORCID: https://orcid.org/0000-0002-1262-1264)
- Ricardo F. Mendes (ORCID: https://orcid.org/0000-0001-8242-324X)
- Gonçalo Valente (ORCID: https://orcid.org/0000-0002-7155-1462)
- Joaquín Calbo (ORCID: https://orcid.org/0000-0003-4729-0757)
- Flávio Figueira (ORCID: https://orcid.org/0000-0002-3685-9736)
- Catarina Ribeiro (ORCID: https://orcid.org/0000-0003-1584-8680)
Institutions
- Universitat de València (ES)
- Universidade de Santiago de Compostela (ES)
- Parc Científic de la Universitat de València (ES)
- Center for Research in Molecular Medicine and Chronic Diseases (ES)
- University of Aveiro (PT)
- Massachusetts Institute of Technology (US)
Publication Details
- Journal
- Journal of the American Chemical Society
- Published
- 2024-12-19
- DOI
- https://doi.org/10.1021/jacs.4c13792
- Citations
- 26
- Primary Topic
- Metal-Organic Frameworks: Synthesis and Applications
- Type
- article
- Field-Weighted Citation Impact
- 4.12
Funders
- Ministerio de Ciencia, Innovación y Universidades
- European Commission
- Ministerio de Economía y Competitividad
- Xunta de Galicia
- Centro de Investigação em Materiais Cerâmicos e Compósitos
- HORIZON EUROPE Framework Programme
- European Research Council
- Fundação para a Ciência e a Tecnologia
- Division of Materials Research