A1 Vertaisarvioitu alkuperäisartikkeli tieteellisessä lehdessä
Effect of urea as a chaotropic agent on self-association of organic molecules in aqueous flow batteries
Tekijät: Shahsavan, Mahsa; Wiberg, Cedrik; Poskela, Aapo; Martinez-Gonzalez, Eduardo; Peljo, Pekka
Kustantaja: Royal Society of Chemistry
Julkaisuvuosi: 2026
Lehti: Physical Chemistry Chemical Physics
ISSN: 1463-9076
eISSN: 1463-9084
DOI: https://doi.org/10.1039/d5cp03782d
Julkaisun avoimuus kirjaamishetkellä: Avoimesti saatavilla
Julkaisukanavan avoimuus : Osittain avoin julkaisukanava
Verkko-osoite: https://pubs.rsc.org/en/content/articlelanding/2026/cp/d5cp03782d
Rinnakkaistallenteen osoite: https://research.utu.fi/converis/portal/detail/Publication/515846404
Rinnakkaistallenteen lisenssi: CC BY
Rinnakkaistallennetun julkaisun versio: Kustantajan versio
This paper investigates the effect of urea, a widely used denaturing co-solute, on the aggregation of promising candidates for aqueous organic flow batteries, specifically 9,10-anthraquinone-2,7-disulfonic acid (AQDS) and naphthalene diimide derivatives (NDIs). These molecules undergo aggregation through π-π interactions of their aromatic cores. We evaluated how urea influences molecular interactions and electrochemical behavior of these molecules by nuclear magnetic resonance (NMR), cyclic voltammetry (CV), rotating disk electrode (RDE), and flow battery testing. While NMR confirmed that urea effectively disrupts π-π stacking and reduces the concentration-dependent shifts and peak broadening, electrochemical measurements showed that this effect is only partial. These results highlight the difference between molecular-level disruption of aggregation and limited improvements in electrochemical performance.
Ladattava julkaisu This is an electronic reprint of the original article. |  |
Julkaisussa olevat rahoitustiedot:
We are grateful for the financial support from the Research Council of Finland (BioFlow project, Grant agreement 343493) and the Jenny and Antti Wihuri Foundation for the homing grant. This work has also partially emanated from the research of P. P. and C. W. supported by the European Research Council (Starting Grant, agreement no. 950038).
