Probing charge transfer characteristics in a donor–acceptor metal–organic framework by Raman spectroelectrochemistry and pressure-dependence studies
- Univ. of Sydney, NSW (Australia). School of Chemistry
- Univ. of Sydney, NSW (Australia). School of Chemistry; Nagasaki Univ., Nagasaki (Japan). Graduate School of Engineering
- Kyoto Univ. (Japan). Graduate School of Science, Division of Chemistry
- Univ. of Otago, Dunedin (New Zealand). Dept. of Chemistry
- Northwestern Univ., Evanston, IL (United States). Dept. of Chemistry
- Nottingham Trent Univ., Nottingham (England). School of Science and Technology; Univ. Leipzig, Leipzig (Germany). Wilhelm-Ostwald-Inst. for Physical and Theoretical Chemistry
- Univ. Leipzig, Leipzig (Germany). Wilhelm-Ostwald-Inst. for Physical and Theoretical Chemistry; Helmholtz Center Dresden-Rossendorf, Inst. of Resource Ecology, Leipzig (Germany)
- Univ. Leipzig, Leipzig (Germany). Wilhelm-Ostwald-Inst. for Physical and Theoretical Chemistry; Helmholtz Center Dresden-Rossendorf, Inst. of Resource Ecology, Leipzig (Germany); Dresden Univ. of Technology (Germany). School of Science, Faculty of Chemistry and Food Chemistry
The stimuli responsive behaviour of charge transfer donor–acceptor metal–organic frameworks (MOFs) remains an understudied phenomenon which may have applications in tuneable electronic materials. We now report the modification of donor–acceptor charge transfer characteristics in a semiconducting tetrathiafulvalene–naphthalene diimide-based MOF under applied electrochemical bias and pressure. Here, we employ a facile solid state in situ Raman spectroelectrochemical technique, applied for the first time in the characterisation of electroactive MOFs, to monitor the formation of a new complex TTFTC˙+–DPNI from a largely neutral system, upon electrochemical oxidation of the framework. In situ pressure-dependent Raman spectroscopy and powder X-ray diffraction experiments performed in a diamond anvil cell revealed blue shifts in the donor and acceptor vibrational modes in addition to contractions in the unit cell which are indicative of bond shortening. This study demonstrates the utility of in situ Raman spectroscopic techniques in the characterisation of redox-active MOFs and the elucidation of their electronic behaviours.
- Research Organization:
- Univ. of Minnesota, Minneapolis, MN (United States). Nanoporous Materials Genome Center
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Contributing Organization:
- Australian Research Council (ARC); SydneyNano; Vibrational Spectroscopy Core Facility at the University of Sydney
- Grant/Contract Number:
- SC0008688; FG02-17ER16362; Award DE-FG02-17ER16362; FG02-87ER13808
- OSTI ID:
- 1491713
- Alternate ID(s):
- OSTI ID: 1476118
- Journal Information:
- Physical Chemistry Chemical Physics. PCCP, Vol. 20, Issue 40; ISSN 1463-9076
- Publisher:
- Royal Society of ChemistryCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
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