Journal article
Quantifying Environmental Effects on the Solution and Solid-State Stability of a Phenothiazine Radical Cation
Chemistry of materials, v 32(7), pp 3007-3017
14 Apr 2020
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Organic radical cations are important intermediates in a wide variety of chemical processes. To date, significant progress has been made to improve the stability of these charged materials for use in electrochemical energy storage applications, especially in redox flow batteries. Here, we report the synthesis and isolation of four radical cation salts of N-(2-(2-methoxyethoxy)-ethyl)phenothiazine (MEEPT), synthesizing MEEPT-X where X is tetrafluoroborate (BF4-), hexafluorophosphate (PF6- ), perchlorate (ClO4-), and bis(trifluoromethanesulfonyl)imide (TFSI ), and a comparison of their stability in solution and in the solid state. In the solution, UV-vis spectroscopy and rotating ring-disk electrode voltammetry show similar stability trends with respect to anion identity, with the TFSI- salt being the most stable. In the solid state, these compounds show remarkable stability in air and at elevated temperatures, with the ClO4- salt surviving after being heated at 90 degrees C overnight in air. The different trends in MEEPT-X stability with X highlight the importance of concentration and the environment on the overall stability.
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Details
- Title
- Quantifying Environmental Effects on the Solution and Solid-State Stability of a Phenothiazine Radical Cation
- Creators
- Aman Preet Kaur - University of KentuckyOliver C. Harris - Drexel UniversityN. Harsha Attanayake - University of KentuckyZhiming Liang - University of KentuckySean R. Parkin - University of KentuckyMaureen H. Tang - Drexel UniversitySusan A. Odom - University of Kentucky
- Publication Details
- Chemistry of materials, v 32(7), pp 3007-3017
- Publisher
- American Chemical Society; Washington, DC
- Number of pages
- 11
- Grant note
- 1751553 / National Science Foundation through the CBET division Department of Energy, Office of Science, Basic Energy Sciences through the Joint Center for Energy Storage Research; United States Department of Energy (DOE) 1625732 / NSF MRI program; National Science Foundation (NSF); NSF - Office of the Director (OD) 1800482 / National Science Foundation through CHE CSDM-B
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Chemical and Biological Engineering
- Web of Science ID
- WOS:000526394000030
- Scopus ID
- 2-s2.0-85092187213
- Other Identifier
- 991019168347304721
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- Collaboration types
- Domestic collaboration
- Web of Science research areas
- Chemistry, Physical
- Materials Science, Multidisciplinary