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Three-Phase Electrochemistry of a Highly Lipophilic Neutral Ru-Complex Having a Tridentate Bis(benzimidazolate)pyridine Ligand

preprint
revised on 23.04.2020 and posted on 24.04.2020 by Vishwanath R.S, Masa-aki Haga, Takumi Watanabe, Emilia Witkowska Nery, Martin Jönsson-Niedziolka
Here we describe the synthesis and electrochemical testing of a heteroleptic bis(tridentate) ruthenium(II) complex [RuII(LR)(L)]0 (LR =2,6-bis(1-(2-octyldodecan)benzimidazol-2-yl)pyridine, L = 2,6-bis(benzimidazolate)pyridine). It is a neutral complex which undergoes a quasireversible oxidation and reduction at relatively low potential. The newly synthetized compound was used for studies of ion-transfer at the three-phase junction because of the sensitivity of this method to cation expulsion. The [RuII(LR)(L)]0 shows exceptional stability during cycling and is sufficiently lipophilic even after oxidation to persist in the organic phase also using very hydrophilic anions such as Cl. Given its low redox potential and strong lipophilicity this compound will be of interest as an electron donor in liquid-liquid electrochemistry.

Funding

NCN 2015/18/E/ST4/00319, National Science Centre Poland

Energy Storage Devices based on Proton-Electron Synchronized Movements on Coordinated Ligands in Metal Complexes

Japan Society for the Promotion of Science

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Fabrication of molecular memristor based on proton/ion transfer on metal complex heterojunction

Japan Society for the Promotion of Science

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History

Email Address of Submitting Author

martinj@ichf.edu.pl

Institution

Institute of Physical Chemistry, Polish Academy of Sciences

Country

Poland

ORCID For Submitting Author

0000-0001-5642-5946

Declaration of Conflict of Interest

No conflict of interest

Version Notes

Revision 2, now including Fig 2.

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