63996-36-1Relevant articles and documents
Redox-active ferrocene-containing iridium(III) complex for non-volatile flash memory
Deng, Yongjing,Liu, Shujuan,Ma, Chenxi,Tan, Qi,Tang, Runze,Tao, Peng,Yang, Baojie,Zhao, Menglong,Zhao, Qiang,Zhao, Weiwei
, (2020)
A new ferrocene-containing iridium(III) complex (complex 2) has been designed and synthesized. Its structure, photophysical property, electrochemistry and memory behaviors were well investigated. The memory device with a sandwich structure of ITO/complex 2/Al (D2) exhibited flash memory performance with a bistable conductive process, which showed a high ON/OFF current ratio of 103, long retention time of 103 s, and low threshold voltage of ?0.55 V. After 105 read cycles, no significant degradation was observed in the ON and OFF states at a read voltage of 1.0 V. The ferrocene group of complex 2 serves as the redox-active unit, and a redox memory mechanism is proposed to explain the conductive process based on the analysis of I–V, cyclic voltammetry and theoretical calculation data. Thus, the design of redox-active metal complex used for novel non-volatile memory device provided an alternative strategy for the further development of organic memory materials and devices.u202c
Electrophosphorescent heterobimetallic oligometallaynes and their applications in solution-processed organic light-emitting devices
Zhou, Guijiang,He, Yue,Yao, Bing,Dang, Jingshuang,Wong, Wai-Yeung,Xie, Zhiyuan,Zhao, Xiang,Wang, Lixiang
, p. 2405 - 2414 (2010)
By combining the iridium(III) ppy-type complex (Hppy=2-phenylpyridine) with a square-planar platinum(II) unit, some novel phosphorescent oligometallaynes bearing dual metal centers (viz. IrIII and PtII) were developed by combining trans-[Pt(PBu3)2Cl2] with metalloligands of iridium possessing bifunctional pendant acetylene groups. Photophysical and computational studies indicated that the phosphorescent excited states arising from these oligometallaynes can be ascribed to the triplet emissive IrIII ppy-type chromophore, owing to the obvious trait (such as the longer phosphorescent lifetime at 77 K) also conferred by the PtII center. So, the two different metal centers show a synergistic effect in governing the photophysical behavior of these heterometallic oligometallaynes. The inherent nature of these amorphous materials renders the fabrication of simple solution-processed doped phosphorescent organic light-emitting diodes (PHOLEDs) feasible by effectively blocking the close-packing of the host molecules. Saliently, such a synergistic effect is also important in affording decent device performance for the solution-processed PHOLEDs. A maximum brightness of 3356 cdm-2 (or 2708 cdm -2), external quantum efficiency of 0.50% (or 0.67%), luminance efficiency of 1.59 cdA-1 (or 1.55 cdA-1), and power efficiency of 0.60 LmW-1 (or 0.55 LmW-1) for the yellow (or orange) phosphorescent PHOLEDs can be obtained. These results show the great potential of these bimetallic emitters for organic light-emitting diodes.
Dual-Emissive Cyclometalated Iridium(III) Polypyridine Complexes as Ratiometric Biological Probes and Organelle-Selective Bioimaging Reagents
Zhang, Kenneth Yin,Liu, Hua-Wei,Tang, Man-Chung,Choi, Alex Wing-Tat,Zhu, Nianyong,Wei, Xi-Guang,Lau, Kai-Chung,Lo, Kenneth Kam-Wing
, p. 6582 - 6593 (2015)
In this Article, we present a series of cyclometalated iridium(III) polypyridine complexes of the formula [Ir(N^C)2(N^N)](PF6) that showed dual emission under ambient conditions. The structures of the cyclometalating and diimine liga
Effect of biphenyl spacers on the anionic polymerization of 2-(4′-vinylbiphenyl-4-yl)pyridine
Kang, Nam-Goo,Changez, Mohammad,Kim, Myung-Jin,Lee, Jae-Suk
, p. 6706 - 6714 (2014)
The pyridine-containing monomer 2-(4′-vinylbiphenyl-4-yl)pyridine (VBPPy), synthesized by the Suzuki coupling reaction, was successfully polymerized using diphenylmethylpotassium (DPM-K) as an initiator within 360 min at -78 °C, resulting in 100% yield an
Solution processable phosphorescent dendrimers based on cyclic phosphazenes for use in organic light emitting diodes (OLEDs)
Bolink, Henk J.,Santamaria, Sonsoles Garcia,Sudhakar, Sundarraj,Zhen, Changgua,Sellinger, Alan
, p. 618 - 620 (2008)
A novel solution processable phosphorescent dendrimer based on cyclic phosphazene (CP) cores has been prepared and used as emissive layers in simple OLED architectures, providing efficiencies of 24.0 cd A-1 and 16.7 lm W-1. The Royal Society of Chemistry.
Cp*Rh(iii)/boron hybrid catalysis for directed C-H addition to β-substituted α,β-unsaturated carboxylic acids
Hirata, Yuki,Kojima, Masahiro,Matsunaga, Shigeki,Tanaka, Ryo,Yoshino, Tatsuhiko
supporting information, p. 76 - 79 (2021/12/29)
The C-H bond addition reaction of 2-phenylpyridine derivatives with α,β-unsaturated carboxylic acids catalyzed by Cp*Rh(iii)/BH3·SMe2is reported. Activation of C-H bonds with the rhodium catalyst and activation of α,β-unsaturated carboxylic acids with the boron catalyst cooperatively work, and a BINOL-urea hybrid ligand significantly improved the reactivity. With the optimized hybrid catalytic system, various β-disubstituted carboxylic acids were obtained under mild reaction conditions.
Dianthracene compound containing pyridyl at tail end and application thereof
-
Paragraph 0086-0089; 0118-0121, (2021/03/03)
The invention provides dianthracene compounds shown in a general formula I in the specification. In the general formula I, L1 and L2 represent single bonds, substituted or unsubstituted heterocyclic aromatic groups of C2-C60 or substituted or unsubstituted hydrocarbon aromatic groups of C6-C60; L3 represents a substituted or unsubstituted heterocyclic aromatic group of C2-C60 or a substituted or unsubstituted hydrocarbon aromatic group of C6-C60; L1, L2 and L3 are shown in a formula in the specification at different time; R10, R18, R21 and R23-R28 represent hydrogen, halogen and substituted or unsubstituted alkyl or alkoxy of C1-C10. The compounds have good luminescence properties, high electron transport capacities and terrific solubility and can be used in luminescent materials, electron transport materials and hole-blocking materials in the electroluminescence field. The invention also provides an organic electroluminescence device at least comprising a pair of electrodes and organic luminescent media between the electrodes. The organic luminescent media at least comprise the dianthracene compounds.
Dianthracene compound containing pyridyl at tail end and application thereof
-
Paragraph 0096-0099; 0128-0131, (2021/03/03)
The invention provides dianthracene compounds shown in a general formula I in the specification. In the general formula I, L1 and L2 independently represent single bonds, substituted or unsubstituted heterocyclic aromatic groups of C2-C60 or substituted or unsubstituted hydrocarbon aromatic groups of C6-C60; L3 represents a substituted or unsubstituted heterocyclic aromatic group of C2-C60 or a substituted or unsubstituted hydrocarbon aromatic group of C6-C60; R10, R11, R12, R13, R14, R15, R16, R17, R18, R21, R23, R24, R25, R26, R27 and R28 independently represent hydrogen, halogen and substituted or unsubstituted alkyl or alkoxy of C1-C10. The compounds have good luminescence properties, high electron transport capacities and terrific solubility and can be used in luminescent materials, electron transport materials and hole-blocking materials in the electroluminescence field. The invention also provides an organic electroluminescence device at least comprising a pair of electrodes and organic luminescent media between the electrodes. The organic luminescent media at least comprise the dianthracene compounds.
Compound with AMPK agonistic activity and preparation and application of prodrug thereof
-
Paragraph 0229-0232, (2021/10/27)
The invention relates to a compound with AMPK agonistic activity and a prodrug thereof, and as well as a preparation method and medical application of a prodrug thereof. The compound has the structure shown in the formula (I), and the prodrug of the compound has the structure shown in the formula (II), wherein each group and the substituent are as defined in the specification. The invention discloses a preparation method of the compound and application of the compound in prevention and treatment AMPK related diseases, and the AMPK related diseases include, but are not limited to, energy metabolism abnormality related diseases. Neurodegenerative diseases and inflammation-related diseases and the like.
Manipulating MLCT transition character with ppy-type four-coordinate organoboron skeleton for highly efficient long-wavelength Ir-based phosphors in organic light-emitting diodes
Deng, Xuming,Feng, Zhao,Sun, Yuanhui,Wu, Zhaoxin,Yang, Xiaolong,Yu, Yue,Zhong, Daokun,Zhou, Guijiang
supporting information, p. 12650 - 12660 (2021/10/06)
Inspired by the intriguing optoelectronic characteristics of the 2-phenylpyridine-type (ppy-type) four-coordinate organoboron skeleton, we envisage a molecular design strategy by manipulating the MLCT transition character to develop high-performance long-wavelength Ir-based phosphors with a ppy-type four-coordinate organoboron skeleton for organic light-emitting diodes (OLEDs). Three ppy-type cyclometalated Ir(iii) complexes are successfully prepared.IrOBNandIrPBNexhibit the expected long-wavelength phosphorescent emission at 620 and 604 nm, respectively, due to the electron-accepting ability of the pyridine coordinated with the boron atom (pyd(B)) in extending the π-conjugated length for the LUMO, thus leading to stabilization of the LUMO. Interestingly,IrMBNshows a green phosphorescence at 514 nm. The more electron-deficient pyd(B) inIrMBNleads to a reorganized and localized LUMO distribution pattern mainly on pyd(B) rather than the pyridine coordinated with the Ir atom (pyd(Ir)), shortening the π-conjugation length for the LUMO, hence resulting in an elevated LUMO. Benefiting from the high rigidity of the ppy-type four-coordinate organoboron skeleton, these three ppy-type cyclometalated Ir(iii) complexes show high PLQY (ca.0.6-1). Beneficially, we can achieve impressive electroluminescence (EL) performance based onIrPBNwith the highest efficiencies of a maximum external quantum efficiency (ηext) of 26.0%, a maximum current efficiency (ηL) of 42.0 cd A?1, and a maximum power efficiency (ηP) of 38.5 lm W?1, respectively. All these excellent results convincingly demonstrate the effectiveness of our molecular design strategy and the great potential of the ppy-type four-coordinate organoboron skeleton in developing high-performance Ir-based phosphors.
