Outstanding luminescence from neutral copper(i) complexes with pyridyl-tetrazolate and phosphine ligands

Bergmann, Larissa; Friedrichs, Jana; Mydlak, Mathias; Baumann, Thomas; Nieger, Martin; Bräse, Stefan

doi:10.1039/c3cc42280a

Cited by 160 publications

(97 citation statements)

References 25 publications

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“…Furthermore, the lifetime of emission at 77 K is substantially longer than that at 298 K. These observations suggest that luminescence from complex 5, in the solid-state at room temperature, can be tentatively ascribed to thermally activated delayed fluorescence (TADF) [41], which occurs when the S 1 -T 1 energy gap is small enough to achieve thermal equilibrium between the two states. TADF has frequently been observed from Cu(I) complexes but rarely from Au(I) complexes [42].…”

Section: Structure Of the Mononuclear Au(xantphos)(scn) Complexmentioning

confidence: 71%

Structural characterization of dinuclear gold(I) diphosphine complexes with anion-triggered luminescence

et al. 2015

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Section: Structure Of the Mononuclear Au(xantphos)(scn) Complexmentioning

confidence: 71%

Structural characterization of dinuclear gold(I) diphosphine complexes with anion-triggered luminescence

et al. 2015

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“…[1][2][3][4][5][6][7][8] The interest stems from the increasing demand of more-affordable complexes in preference to luminescent metal complexes based on precious (i.e. the platinum group) and rare-earth metals, which are oen quite expensive and environmentally problematic.…”

Section: Introductionmentioning

confidence: 99%

Mechanochemical preparation of copper iodide clusters of interest for luminescent devices

et al. 2014

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The copper iodide complexes are known for their large variety of coordination geometries. Such diversity, while making it difficult to predict the final structure, permits the preparation of a great number of copper iodide complexes based on the same ligand. The target of the research was that of thoroughly exploring the chemistry of CuI and the ligand diphenyl-2-pyridyl phosphine (PN) by varying the stoichiometric ratio and/or the aggregation state. Six different compounds have been identified: [Cu4I4(PN)2], [Cu4I4(PN)2·(CH2Cl2)0.5], [CuI(PN)0.5]∞, [CuI(PN)3] whose structures have been determined during this study, CuI(PN)2 which was characterized by powder diffraction and [Cu2I2(PN)3] which has been already reported. The preparation routes are also different: synthesis in solution yielded [Cu4I4(PN)2·(CH2Cl2)0.5] and [CuI(PN)3] while [CuI(PN)0.5]∞ and CuI(PN)2 were obtained only via solid state reactions. These two latter examples confirmed that mechanochemistry is a valid route to explore the landscape of the possible structures of CuI derivatives. Crystallization by traditional solution procedures failed to give the desired crystal, so structure determination of the new compounds was tackled in two ways: by attempting crystal growth via solvothermal synthesis and by resolving the structure from X-ray powder diffraction data with "direct space" methods. What is more the photophysical properties of the complexes that could be obtained as sufficiently pure powders have also been investigated and are reported herein.

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“…The heteroleptic [Cu(N^N)(POP)] + complexes [8][9][10] with sterically bulky substituents on ligands show high phosphorescence yields owing to the effective suppression of the flattening distortion in excited state since the pioneer's work of McMillin and co-workers [11] and some of them have been successfully used in OLEDs. On the basis of the yellow phosphorescent dye, bis [2-(dipphenylphosphino)-phenyl] ether Cu(I) (2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline) [Cu(POP)(Me-phenyl-phen)] + [12], a green Cu(I) complex (emission at 530 nm), [Cu(PyIm)(POP)] + (PyIm=2-(2'-pyridyl) imidazole), was designed by changing the ancillary ligand from phenanthroline derivatives to imidazole derivatives [13].…”

Section: Introductionmentioning

confidence: 99%

Accesses to electronic structures and the excited states of blue luminescent copper(I) complexes containing N-heterocyclic carbene ligands: a DFT/TDDFT exploitation

Zhao

et al. 2014

J Mol Model

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The ground electronic states and photophysical properties of three designed Cu(I) complexes [Cu(ImNHC)(POP)](+) (1), [Cu(methyl-ImNHC)(POP)](+) (2), and [Cu(BenzImNHC)(POP)](+) (3); where [ImNHC = 3-methyl-1-(pyridin-2-yl)-1H-imidazol-2-ylidene; methyl-ImNHC = 3-methyl-1-(pyridin-2-ylmethyl)-1H-imidazol-2-ylidene; BenzImNHC = 3-methyl-1-(pyridin-2-yl)-1H-benzimidazol-2-ylidene], have been investigated using density functional theory (DFT) and time-dependent density functional theory (TDDFT). The results reveal that the presence of the methylene spacer in the NHC ligands has a more direct effect on the distribution of frontier molecular orbitals while the elongation of π conjugation provided by the fused imidazole in the NHC ligands has a negligible effect. The UV-vis absorption spectra of all the complexes are well produced by TD-DFT calculations based on the charge transfer amount calculations and the corresponding band assignments are discussed. Importantly, the triplet energy calculations demonstrated that complex 2 would be a highly efficient blue emitter with the deep-blue of 440 nm.

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Outstanding luminescence from neutral copper(i) complexes with pyridyl-tetrazolate and phosphine ligands

Cited by 160 publications

References 25 publications

Structural characterization of dinuclear gold(I) diphosphine complexes with anion-triggered luminescence

Structural characterization of dinuclear gold(I) diphosphine complexes with anion-triggered luminescence

Mechanochemical preparation of copper iodide clusters of interest for luminescent devices

Accesses to electronic structures and the excited states of blue luminescent copper(I) complexes containing N-heterocyclic carbene ligands: a DFT/TDDFT exploitation

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