Sławomir Kula, P. Ledwon, A. Maroń
May 4, 2021
Citations
0
Influential Citations
7
Citations
Journal
Dyes and Pigments
Abstract
Abstract Four new 1-phenyl-1H-phenanthro[9,10-d]imidazole derivatives containing N-donor substituents at the C2 position were synthesized using simple condensation reaction. Thermal, electrochemical, spectroelectrochemical, and optical properties of synthesized compounds were investigated, while their purity was confirmed by NMR spectroscopy and HRMS. They are characterized by high thermal stability above 243oC. Electrochemical measurements were carried out in dichloromethane (DCM) and THF. Quasi-reversible peaks of N2 and N5 oxidation as opposed to irreversible oxidation in THF were observed in DCM. N2 - N5 exhibit at least three well-developed absorption bands, which is typical for π→π* transitions. All phenanthro[9,10-d]imidazole derivatives exhibit high photoluminescence quantum yields in the range of 34% to 82% in solution. Additionally, the electroluminescent ability of the synthesized compounds was preliminarily tested.