Radical anions of quinoxalines (an in situ electron paramagnetic resonance spectroelectrochemical and theoretical study)

Lušpai, Karol; Staško, Andrej; Lukeš, Vladimı́r; Dvoranová, Dana; Barbieriková, Zuzana; Bella, Maroš; Milata, Viktor; Rapta, Peter; Brezová, Vlasta

doi:10.1007/s10008-014-2625-6

“…The positive band above 700 nm noticed in the second EADS could be interpreted in terms of the simultaneous localization of a negative charge on the quinoxaline unit and a positive charge on the triphenylamine donor, as evidenced in previous studies. 45,46 After 14.4 ps for DQ1 (7.3 ps for DQ2) the red component evolves towards the blue EADS. Although the spectral shape of the third EADS remains mostly unaffected, the stimulated emission signal partially recovers and red-shifts of about 30 nm reflecting a dynamic Stokes-shift due to solvent-induced excited state relaxation.…”

Section: Transient Absorption Spectroscopy (Tas) Studiesmentioning

confidence: 99%

Luminescent solar concentrators with outstanding optical properties by employment of D–A–D quinoxaline fluorophores

Papucci

¹

,

Charaf

²

,

Coppola

³

et al. 2021

View full text Add to dashboard Cite

show abstract

Electrochemical Arylation of Electron‐Deficient Arenes through Reductive Activation

Wang

¹

,

Yang

²

,

Wang

³

et al. 2019

View full text Add to dashboard Cite

An electrochemical method has been developed to achieve arylation of electron‐deficient arenes through reductive activation. Various electron‐deficient arenes and aryldiazonium tetrafluoroborates are amenable to this transformation within the conditions of an undivided cell, providing the desired products in up to 92 % yield. Instead of preparing diazonium reagents, these reactions can begin from anilines, and they can be carried out in one pot. Electron paramagnetic resonance studies indicate that cathodic reduction of quinoxaline occurs using the transformation. Moreover, cyclic voltammetry indicates that both quinoxaline and aryl diazonium salt have relatively low reduction potentials, which suggests they can be activated through reduction during the reaction.

show abstract

Electrochemical Arylation of Electron‐Deficient Arenes through Reductive Activation

Wang

¹

,

Yang

²

,

Wang

³

et al. 2019

View full text Add to dashboard Cite

An electrochemical method has been developed to achieve arylation of electron‐deficient arenes through reductive activation. Various electron‐deficient arenes and aryldiazonium tetrafluoroborates are amenable to this transformation within the conditions of an undivided cell, providing the desired products in up to 92 % yield. Instead of preparing diazonium reagents, these reactions can begin from anilines, and they can be carried out in one pot. Electron paramagnetic resonance studies indicate that cathodic reduction of quinoxaline occurs using the transformation. Moreover, cyclic voltammetry indicates that both quinoxaline and aryl diazonium salt have relatively low reduction potentials, which suggests they can be activated through reduction during the reaction.

show abstract

Radical anions of quinoxalines (an in situ electron paramagnetic resonance spectroelectrochemical and theoretical study)

Cited by 6 publications

References 40 publications

Luminescent solar concentrators with outstanding optical properties by employment of D–A–D quinoxaline fluorophores

Luminescent solar concentrators with outstanding optical properties by employment of D–A–D quinoxaline fluorophores

Electrochemical Arylation of Electron‐Deficient Arenes through Reductive Activation

Electrochemical Arylation of Electron‐Deficient Arenes through Reductive Activation

Contact Info

Product

Resources

About