The Nature of Charge Carriers in Polymeric Complexes of Nickel with Schiff Bases Containing Electron-Withdrawing Substituents
- Authors: Dmitrieva E.A.1, Chepurnaya I.A.2, Karushev M.P.2, Timonov A.M.2
- 
							Affiliations: 
							- Center of Spectroelectrochemistry, Leibniz Institute for Solid State and Materials Research (IFW Dresden)
- Ioffe Institute, Russian Academy of Sciences
 
- Issue: Vol 55, No 11 (2019)
- Pages: 1039-1046
- Section: Article
- URL: https://journals.rcsi.science/1023-1935/article/view/191137
- DOI: https://doi.org/10.1134/S1023193519110041
- ID: 191137
Cite item
Abstract
The data on polymeric complexes of nickel with salen-type Schiff bases containing electron-withdrawing nitro groups in ligand’s aromatic fragments are acquired by an in situ technique based on collecting electron paramagnetic resonance spectra simultaneously with absorption spectra in the UV, visible, and near IR regions in the course of oxidation-reduction of a polymer film on the surface of an optically transparent electrode under conditions of cyclic voltammetry. Based on the combined analysis of spectroscopic and electrochemical data, it is shown that as the potential of the polymer-modified electrode shifts in the positive region, the different types of charge carriers successively appear in the system (phenoxyl radical cations, radical pairs, and dications). The results obtained suggest that the positive charge can be delocalized either between aromatic rings in monomer fragments or between fragments of neighboring polymer chains.
About the authors
E. A. Dmitrieva
Center of Spectroelectrochemistry, Leibniz Institute for Solid State and Materials Research (IFW Dresden)
														Email: amtimonov@yahoo.com
				                					                																			                												                	Germany, 							Dresden, 01069						
I. A. Chepurnaya
Ioffe Institute, Russian Academy of Sciences
														Email: amtimonov@yahoo.com
				                					                																			                												                	Russian Federation, 							St. Petersburg, 194021						
M. P. Karushev
Ioffe Institute, Russian Academy of Sciences
							Author for correspondence.
							Email: mkarushev@gmail.com
				                					                																			                												                	Russian Federation, 							St. Petersburg, 194021						
A. M. Timonov
Ioffe Institute, Russian Academy of Sciences
							Author for correspondence.
							Email: amtimonov@yahoo.com
				                					                																			                												                	Russian Federation, 							St. Petersburg, 194021						
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