Dual phosphorescent emissions from conformers of iridium complex rotors.

Hsu, Yu-Ting; Bhagani, Chandni; Aguilar, Juan A.; Fox, Mark A.; Yufit, Dmitry; Davidson, Ross; Beeby, Andrew

Abstract

The chiral iridium rotors Ir(ppy)2(pyX)Cl (X = C≡C-SiR3, R= alkyl) remarkably contain two distinct rotational conformers in the ground (S0) and excited (T1) states that can be detected by NMR and emission measurements respectively at variable temperatures. The observed phosphorescent emissions, vibronic (involving L = ppy) and broad (L = pyX), arise from different triplet ligand to metal charge transfers from the two rotational conformers at distinct 3MLCT excited states. Both conformers exist in these Ir(ppy)2(pyX)Cl rotors due to the electron-withdrawing, conjugated substituent X.

Citation

Hsu, Y.-T., Bhagani, C., Aguilar, J. A., Fox, M. A., Yufit, D., Davidson, R., & Beeby, A. (2024). Dual phosphorescent emissions from conformers of iridium complex rotors. Dalton Transactions, 53(43), 17518-17524. https://doi.org/10.1039/D4DT02321H

• Journal Article Type: Article
• Acceptance Date: Sep 24, 2024
• Online Publication Date: Oct 11, 2024
• Publication Date: Nov 21, 2024
• Deposit Date: Oct 23, 2024
• Publicly Available Date: Oct 23, 2024
• Journal: Dalton Transactions
• Print ISSN: 1477-9226
• Electronic ISSN: 1477-9234
• Publisher: Royal Society of Chemistry
• Peer Reviewed: Peer Reviewed
• Volume: 53
• Issue: 43
• Pages: 17518-17524
• DOI: https://doi.org/10.1039/D4DT02321H
• Keywords: Iridium, molecular rotor, phosphorescence, variable temperature-NMR
• Public URL: https://durham-repository.worktribe.com/output/2980275