期刊论文详细信息
Frontiers in Chemistry
Redox Property Tuning in Bipyridinium Salts
Petr Mazúr1  Michaela Mikešová1  Tomas Bystron2  Jaroslav Kvíčala3  Zuzana Burešová4  Filip Bureš4  Milan Klikar4 
[1] Department of Chemical Engineering, Faculty of Chemical Engineering, University of Chemistry and Technology Prague, Prague, Czechia;Department of Inorganic Technology, Faculty of Chemical Technology, University of Chemistry and Technology Prague, Prague, Czechia;Department of Organic Chemistry, Faculty of Chemical Technology, University of Chemistry and Technology Prague, Prague, Czechia;Institute of Organic Chemistry and Technology, Faculty of Chemical Technology, University of Pardubice, Pardubice, Czechia;
关键词: bipyridine;    bipyridinium;    redox flow battery;    property tuning;    synthesis;    electrochemistry;   
DOI  :  10.3389/fchem.2020.631477
来源: DOAJ
【 摘 要 】

Bipyridinium salts are currently very popular due to their perspective applications in redox flow batteries. Hence, we designed and prepared a series of bipyridiniums based on 2,2′-, 3,3′-, and 4,4′-bipyridine and 2,2′-bipyrimidine. The straightforward synthesis utilizes commercially or readily available starting compounds and their direct N-alkylation, mostly using 1,3-propanesultone. All eleven target derivatives with systematically evolved structure were investigated by cyclic voltammetry, which allowed elucidating thorough structure-property relationships. The electrochemical behavior depends primarily on the parent scaffold, type of N-alkylation, number of quaternized nitrogen atoms, planarity, counter ion as well as the used media. Two derivatives featuring quasi-reversible redox processes were further tested on rotating disc electrode and in a flow battery half-cell. 4,4′-Bipyridinium derivative bearing two sultone residues showed better performance and stability in the flow half-cell with small capacity decays of 0.09/0.15% per reduction-oxidation cycle, based on the number of the utilized redox processes (one/two).

【 授权许可】

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