A series of pure-blue-light emitting Cu(i) complexes with thermally activated delayed fluorescence: structural, photophysical, and computational studies.
In: Dalton Transactions: An International Journal of Inorganic Chemistry, Jg. 46 (2017-02-07), Heft 5, S. 1413-1419
academicJournal
Zugriff:
Four mononuclear Cu(i)–halide complexes containing phosphines and pyridine ligands with strong electron donor substituents, [CuCl(PPh 3 ) 2 (4-NMe 2 py)] (1), [CuI(PPh 3 ) 2 (4-NH 2 py)] (2), [CuI(POP)(4-NH 2 py)] (3), and [CuI(POP)(4-NMe 2 py)]·0.5(Et 2 O) (4), (PPh 3 = triphenylphosphine, 4-NMe 2 py = 4-(dimethylamino)pyridine, POP = bis[(2-diphenyl-phosphino)phenyl]ether, 4-NH 2 py = 4-aminopyridine, Et 2 O = diethyl ether) were synthesized and studied with regard to their structural, photophysical properties and theoretical calculations. The complexes exhibit pure blue thermally activated delayed fluorescence (λ max = 442 (1), 436 (2), 464 (3), and 448 nm (4)) in crystalline at room temperature. Emission lifetime analyses and density functional theory (DFT) calculations show that the blue-light emission at room temperature is the singlet (metal + halide)-to-ligand charge transfer state, ( 1 (M + X)LCT), while that at 77 K is the state of 3 (M + X)LCT transition character, owing to the small singlet–triplet energy gaps (ΔE = 660–1680 cm −1 ). X-ray diffraction structure analysis, photophysical studies and theoretical calculations suggest that the much larger torsion angle between the N-heterocyclic rings and N–Cu–X planes of complex 3 than that of 1, 2 and 4 might causes the bathochromic shift of luminescence, although these complexes containing similar heterocycle ligands. [ABSTRACT FROM AUTHOR]
Copyright of Dalton Transactions: An International Journal of Inorganic Chemistry is the property of Royal Society of Chemistry and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Titel: |
A series of pure-blue-light emitting Cu(i) complexes with thermally activated delayed fluorescence: structural, photophysical, and computational studies.
|
---|---|
Autor/in / Beteiligte Person: | Huang, Chun-Hua ; Wen, Meng ; Wang, Chun-Ya ; Lu, Yong-Feng ; Huang, Xi-He ; Li, Hao-Hong ; Wu, Shu-Ting ; Zhuang, Nai-Feng ; Hu, Xiao-Lin |
Zeitschrift: | Dalton Transactions: An International Journal of Inorganic Chemistry, Jg. 46 (2017-02-07), Heft 5, S. 1413-1419 |
Veröffentlichung: | 2017 |
Medientyp: | academicJournal |
ISSN: | 1477-9226 (print) |
DOI: | 10.1039/c6dt03965k |
Schlagwort: |
|
Sonstiges: |
|