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- Title
Alkyl‐Spacer Enhancement in Performance of Light‐Emitting Electrochemical Cells.
- Authors
Shiu, Ler‐Chun; Chang, Bo‐Ren; Hsiao, Miles C. ‐S.; Sie, Wu‐Sian; Wu, Ming‐Lun; Huang, Li‐Xian; Wang, Cheng‐Ming; Lee, Gene‐Hsiang; Chang, I‐Jy; Su, Hai‐Ching; Shiu, Kom‐Bei
- Abstract
Synthetic, structural, photophysical, and electrochemical study of [Ir(ppy)2(py)2](BF4) (1(BF4)) and four di‐N–N‐bridged complexes of [Ir(ppy)2(bpa)]2(BF4)2 (2A(BF4)2), [Ir(ppy)2((cis‐bpe))]2(BF4)2 (2B(BF4)2), [Ir(ppy)2(tmp)]2(BF4)2 (2C(BF4)2), and [Ir(ppy)2(bpy)]4(BF4)4 (3(BF4)4) are described with Hppy = 2‐phenylpyridine, py = pyridine, N–N = dipyridyl ligands of 1,2‐bis(4‐pyridyl)ethane (bpa), cis‐1,2‐bis(4‐pyridyl)ethylene (cis‐bpe), 1,3‐di(4‐pyridyl)propane (tmp), and 4,4'‐dipyridine (bpy). Five single‐crystal structures of 1(PF6), 2A(NO3)2, 2A(PF6)2, 2B(PF6)2, and 3(NO3)4 were determined, supporting the dibridged structures and presence of a variety of stereoisomers. Application of four luminescent complexes, 1(BF4), 2A(BF4)2, 2C(BF4)2, and 3(BF4)4, in solid‐state light‐emitting electrochemical cells (LECs) is reported. The work demonstrates an effective approach to realize efficient LECs based on dibridged di‐ and multinuclear cationic transition‐metal complexes with a suitably long alkyl spacer in the bridging ligand.
- Subjects
ELECTRIC batteries; PROPANE; LIGANDS (Chemistry); ETHANES
- Publication
European Journal of Inorganic Chemistry, 2020, Vol 2020, Issue 36, p3517
- ISSN
1434-1948
- Publication type
Article
- DOI
10.1002/ejic.202000528