Synthesis of nonplanar bipyridyls bridged by disilane and disiloxane and their phosphorescent copper complexes

Ohshita, Joji; Kai, Takashi; Adachi, Yoshinori; Yamaji, Kosuke; Nakamura, Masashi; Watase, Seiji; Mori, Shigeo; Matsuyama, Noritsumi

doi:10.1002/aoc.5306

Cited by 7 publications

(11 citation statements)

References 24 publications

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“…In 2020, Ohshita and co-workers used disilane- and disiloxane-bridged bipyridines to prepare the copper(I) coordination polymers, DSBPyCu ( 29 ) and DSOBPyCu ( 30 ) (Figure a) . The X-ray crystal structures of the coordination polymers showed that [Cu 2 I 2 (PPh 3 ) 2 ] fragments were linked by bridging bipyridine ligands to form an extended polymeric structure, as shown in Figure b.…”

Section: Copper(i) Coordination Polymers For Oledsmentioning

confidence: 99%

“…The X-ray crystal structures of the coordination polymers showed that [Cu 2 I 2 (PPh 3 ) 2 ] fragments were linked by bridging bipyridine ligands to form an extended polymeric structure, as shown in Figure b. The bipyridine moieties showed moderate twisting with C–C–C–C dihedral angles of 38.47–48.56°, and there were no observable intermolecular interactions in the packing of both compounds . As a result, the coordination polymers had a low tendency to form aggregates in the solid state, rendering them readily processable and, hence, suitable for OLED applications.…”

Section: Copper(i) Coordination Polymers For Oledsmentioning

confidence: 99%

“…As a result, the coordination polymers had a low tendency to form aggregates in the solid state, rendering them readily processable and, hence, suitable for OLED applications. The powders of compounds 29 and 30 were found to emit at 590–615 nm, respectively, showing PLQYs of 0.10 and 0.42 . The copper(I) coordination polymers were used as dopants to fabricate OLEDs with yellow electroluminescence at about 600 nm.…”

Section: Copper(i) Coordination Polymers For Oledsmentioning

confidence: 99%

“…The peak luminance was found to be 120 and 190 cd m –2 for compounds 29 and 30 , respectively, when poly[(carbazolylthiahexyl)silsesquioxane] (PCTSQ) was used as the host material. To further improve the device performance, 3-(biphenyl-4-yl)-5-(4- tert -butylphenyl)-4-phenyl-4 H -1,2,4-triazole (TAZ) was doped into the emissive layer as an electron transport agent and a higher peak luminance value of 387 cd m –2 was achieved . The electroluminescence spectra and device performance of the OLEDs based on compounds 29 and 30 are shown in panels e and f of Figure .…”

Section: Copper(i) Coordination Polymers For Oledsmentioning

confidence: 99%

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Organic Light-Emitting Diodes Based on Luminescent Self-Assembled Materials of Copper(I)

2021

Energy Fuels

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Over the past decade, we have seen the rapid advancement in the technology of organic light-emitting diodes (OLEDs) toward practical applications. The high color contrast, wide viewing angles, good flexibility, and low power consumption of OLEDs have rendered them promising candidates for next-generation displays and solid-state lighting applications. Parallel to the optimization in device structures, of equal importance is the search for new classes of emitters. While conventional OLEDs mainly rely on triplet emitters based on precious metal complexes, such as those of platinum(II) and iridium(III), copper(I) self-assembled materials represent attractive alternatives with relatively low cost but comparable emission tunability. In this mini review, the recent progress in the development of copper(I) self-assembled materials, including copper(I) clusters and coordination polymers, as electroluminescent materials in OLEDs will be discussed.

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Section: Copper(i) Coordination Polymers For Oledsmentioning

confidence: 99%

Section: Copper(i) Coordination Polymers For Oledsmentioning

confidence: 99%

Section: Copper(i) Coordination Polymers For Oledsmentioning

confidence: 99%

Section: Copper(i) Coordination Polymers For Oledsmentioning

confidence: 99%

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Organic Light-Emitting Diodes Based on Luminescent Self-Assembled Materials of Copper(I)

2021

Energy Fuels

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“…[14] We also demonstrated that similar disilane-and disiloxane-bridged bipyridyl copper complexes were useful as phosphorescent organic light emitting diode (OLED) materials. [15] In the present work, we prepared dipyridinostannole DPySn1 (Scheme 1c, E=Sn, R 1 =Ph) as the first example of Sn-bridged bipyridyl and studied its optical properties in comparison with those of DPyS1 and DPyG1 with the same phenyl substituents, [11] to examine the effects of the bridging element. Copper complexes of DPyS1 and DPySn1 were also prepared and their optical properties were investigated in comparison with those of DPyG1.…”

Section: Introductionmentioning

confidence: 99%

Crystal Structures and Phosphorescent Properties of Group 14 Dipyridinometalloles and Their Copper Complexes

2020

Self Cite

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We recently reported dipyridinosilole (DPyS) and dipyridinogermole (DPyG) as π‐conjugated units that show low‐temperature phosphorescence. A copper complex of DPG shows solid‐state phosphorescence at room temperature. In this work, we prepared diphenyldipyridinostannole (DPySn1). Its optical and electrochemical properties were investigated and compared with those of DPyS1 and DPyG1 with the same phenyl substituents. DPySn1 showed the most red‐shifted phosphorescence at 520 nm at 77 K in the solid‐state, which is likely due to the intermolecular Sn‐pyridine interaction that was confirmed by single‐crystal X‐ray diffraction. Copper complexes of DPyS1 and DPySn1 were also prepared and it was found that the phosphorescence of these dipyridinometallole‐copper complex solids was red‐shifted in the order of DPySn1−Cu (617 nm)

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Electroluminescent Clusters

Zhang,

2023

Angewandte Chemie

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Optoelectronic cluster materials emerge rapidly in recent years especially for light‐emitting devices, owing to their 100 % exciton harvesting and unique organic–inorganic hybrid structures with tunable excited‐state characteristics for thermally activated delayed fluorescence and/or phosphorescence and inheritable photo‐ and thermo‐stability. However, for efficient electroluminescence, excited‐state compositions of cluster emitters should be tuned through ligand engineering to enhance ligand‐centered radiative components and reduce cluster‐centered quenching states. Nonetheless, the balance of optoelectronic properties requires delicate and controllable ligand functionalization. On the other hand, in addition to balancing carrier fluxes, it showed that device engineering, especially host matrixes and interfacial optimization, can not only alleviate triplet quenching, but also modify processing and passivate defects. As consequence, the record external quantum efficiencies of cluster light‐emitting diodes already reached ≈30 %. Herein, we overview recent progress of electroluminescent cluster materials and discuss their structure–property relationships, which would inspire the continuous efforts making cluster light‐emitting diodes competent as the new generation of displays and lighting sources.

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Synthesis of nonplanar bipyridyls bridged by disilane and disiloxane and their phosphorescent copper complexes

Cited by 7 publications

References 24 publications

Organic Light-Emitting Diodes Based on Luminescent Self-Assembled Materials of Copper(I)

Organic Light-Emitting Diodes Based on Luminescent Self-Assembled Materials of Copper(I)

Crystal Structures and Phosphorescent Properties of Group 14 Dipyridinometalloles and Their Copper Complexes

Electroluminescent Clusters

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