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Article

Nickel(II) Complex of N4 Schiff Base Ligand as a Building Block for a Conducting Metallopolymer with Multiple Redox States

Ioffe Physical-Technical Institute of the Russian Academy of Sciences (Ioffe Institute), 26 Politekhnicheskaya Str., 194021 St. Petersburg, Russia
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Academic Editor: Julia Romanova
Molecules 2021, 26(9), 2646; https://doi.org/10.3390/molecules26092646
Received: 7 April 2021 / Revised: 27 April 2021 / Accepted: 28 April 2021 / Published: 30 April 2021
Metal–ligand interactions in monomeric and polymeric transition metal complexes of Schiff base ligands largely define their functional properties and perspective applications. In this study, redox behavior of a nickel(II) N4-anilinosalen complex, [NiAmben] (where H2Amben = N,N′-bis(o-aminobenzylidene)ethylenediamine) was studied by cyclic voltammetry in solvents of different Lewis basicity. A poly-[NiAmben] film electrochemically synthesized from a 1,2-dichloroethane-based electrolyte was investigated by a combination of cyclic voltammetry, electrochemical quartz crystal microbalance, in situ UV-Vis spectroelectrochemistry, and in situ conductance measurements between −0.9 and 1.3 V vs. Ag/Ag+. The polymer displayed multistep redox processes involving reversible transfer of the total of ca. 1.6 electrons per repeat unit, electrical conductivity over a wide potential range, and multiple color changes in correlation with electrochemical processes. Performance advantages of poly-[NiAmben] over its nickel(II) N2O2 Schiff base analogue were identified and related to the increased number of accessible redox states in the polymer due to the higher extent of electronic communication between metal ions and ligand segments in the nickel(II) N4-anilinosalen system. The obtained results suggest that electrosynthesized poly-[NiAmben] films may be viable candidates for energy storage and saving applications. View Full-Text
Keywords: metallocomplex; metallopolymer; Schiff base; redox properties; conducting properties; optical properties; energy storage; energy saving; charge delocalization; metal–ligand metallocomplex; metallopolymer; Schiff base; redox properties; conducting properties; optical properties; energy storage; energy saving; charge delocalization; metal–ligand
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MDPI and ACS Style

Karushev, M.; Smirnova, E.; Chepurnaya, I. Nickel(II) Complex of N4 Schiff Base Ligand as a Building Block for a Conducting Metallopolymer with Multiple Redox States. Molecules 2021, 26, 2646. https://doi.org/10.3390/molecules26092646

AMA Style

Karushev M, Smirnova E, Chepurnaya I. Nickel(II) Complex of N4 Schiff Base Ligand as a Building Block for a Conducting Metallopolymer with Multiple Redox States. Molecules. 2021; 26(9):2646. https://doi.org/10.3390/molecules26092646

Chicago/Turabian Style

Karushev, Mikhail, Evgenia Smirnova, and Irina Chepurnaya. 2021. "Nickel(II) Complex of N4 Schiff Base Ligand as a Building Block for a Conducting Metallopolymer with Multiple Redox States" Molecules 26, no. 9: 2646. https://doi.org/10.3390/molecules26092646

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