An iminodibenzyl–quinoxaline–iminodibenzyl scaffold as a mechanochromic and dual emitter: donor and bridge effects on optical properties

Pashazadeh, Ramin; Pander, Piotr; Bucinskas, Audrius; Skabara, Peter J.; Dias, Fernando B.; Grazulevicius, Juozas V.

Abstract

The influence of phenyl linkage and donor strength on the photophysical properties of new derivatives of quinoxaline-containing iminodibenzyl and iminostilbene moieties is studied. The donor–acceptor derivatives showed dual thermally activated delayed fluorescence (TADF) and room temperature phosphorescence (RTP) despite a large energy gap between the excited singlet and triplet states (ca. 0.5 eV). This extremely rare observation is explained by the twisted and rigidified structure of the iminodibenzyl moiety.

Citation

Pashazadeh, R., Pander, P., Bucinskas, A., Skabara, P. J., Dias, F. B., & Grazulevicius, J. V. (2018). An iminodibenzyl–quinoxaline–iminodibenzyl scaffold as a mechanochromic and dual emitter: donor and bridge effects on optical properties. Chemical Communications, 54(98), 13857-13860. https://doi.org/10.1039/c8cc06981f

• Journal Article Type: Article
• Acceptance Date: Nov 19, 2018
• Online Publication Date: Nov 23, 2018
• Publication Date: Dec 21, 2018
• Deposit Date: Nov 26, 2018
• Publicly Available Date: Nov 19, 2019
• Journal: Chemical Communications
• Print ISSN: 1359-7345
• Electronic ISSN: 1364-548X
• Publisher: Royal Society of Chemistry
• Peer Reviewed: Peer Reviewed
• Volume: 54
• Issue: 98
• Pages: 13857-13860
• DOI: https://doi.org/10.1039/c8cc06981f
• Public URL: https://durham-repository.worktribe.com/output/1342561