RT info:eu-repo/semantics/article T1 Addressing Practical Use of Viologen-Derivatives in Redox Flow Batteries through Molecular Engineering A1 Rubio Presa, Rubén A1 Lubián Hernando, Lara A1 Borlaf Pinar, Mario A1 Ventosa Arbaizar, Edgar A1 Sanz Díez, Roberto K1 Química analítica K1 Chemistry, Analytic AB In practical scenarios, viologen-derivatives face an accelerated degradation in the unavoidable presence of traces of oxygen in large-scale redox flow batteries. Herein, we confirm the primary degradation mechanism and propose a straightforward, cheap, and fast method to evaluate the stability of viologen-derivatives toward this degradation. Considering that the cleavage of the N-substituent is the main proposed pathway for viologen degradation, a new viologen-derivative, bearing an alkylsulfonate chain with a secondary carbon center joined to the N atom, is synthesized to illustrate how molecular engineering can be used to improve stability. PB ACS Publications SN 2639-4979 YR 2023 FD 2023-02-07 LK http://hdl.handle.net/10259/9322 UL http://hdl.handle.net/10259/9322 LA eng NO The authors acknowledge the financial support by the Spanish Government (Ministerio de Ciencia e Innovación, Grants PID2021-124974OB-C22 and PID2020-115789GB-C21) and Ramón y Cajal award (RYC2018-026086-I) as well as the MeBattery project. MeBattery has received funding from the European Innovation Council of the European Union under Grant Agreement no. 101046742. This work was supported by the Regional Government of Castilla y León (Junta de Castilla y León) and by the Ministry of Science and Innovation MICIN and the European Union NextGenerationEU/PRTR. We also gratefully acknowledge Junta de Castilla y León (BU049P20) and FEDER for financial support. DS Repositorio Institucional de la Universidad de Burgos RD 11-jul-2024