Work

EPR and UV−Vis−NIR spectroscopic features of radical ions of amino substituted thienyl ketones

Year: 2025

Type: article

Abstract: A series of amino-substituted mono- and bis-thienyl ketones were characterized by means of cyclic voltammetry, ultraviolet−visible−near infrared (UV−Vis−NIR) absorption spectroscopy, and in situ electron paramagnetic resonance (EPR)/UV−Vis−NIR spectroelectrochemistry. The molecular structures of bis-thienyl ketones contain morpholine ( 3a–c ) or N,N ´-disubstituted amino ( 3d–f ) groups. The electrochemical reduction of the ketones leads to the formation of stable radical anions, and their EPR and UV−Vis−NIR spectral features were analyzed in detail. In contrast, the radical cations are not stable and undergo follow-up chemical reactions with formation of redox-active dimers. The EPR data and DFT calculations provide information about the charge/spin localization in the electrochemically generated radical ions.

Source: Electrochimica Acta

DOI: 10.1016/j.electacta.2025.147925

Authors: Evgenia Dmitrieva, Alexey Popov, Horst Hartmann

Institutions: Leibniz Institute for Solid State and Materials Research, Technische Universität Dresden

Language: English

Topic: Electron Spin Resonance Studies

Subfield: Biophysics

Field: Biochemistry, Genetics and Molecular Biology

Domain: Life Sciences

Open Access status: hybrid

Estimated APC paid: $3,790

Funder: Deutsche Forschungsgemeinschaft