92967-67-4Relevant articles and documents
Polymorph-Dependent Thermally Activated Delayed Fluorescence Emitters: Understanding TADF from a Perspective of Aggregation State
Chen, Zhanxiang,Ni, Fan,Yang, Chuluo,Zheng, Kailu,Zhong, Cheng
, p. 9972 - 9976 (2020)
Current research on thermally activated fluorescence (TADF) emitters is mainly based on the molecular levels, while the aggregation states of TADF emitters are to be explored deeply. Now two multifunctional emitters are reported with simultaneous TADF, aggregation induced emission (AIE), and multicolor mechanochromic luminescence (MCL) features. Both emitters also show polymorph-dependent TADF emission. Crystal structure analysis reveals that the polymorphism is ascribed to the mutable conformations in different aggregation states. This work brings new insight to TADF emitters from a perspective of aggregation states.
Sequentially Pd/Cu-Catalyzed Alkynylation-Oxidation Synthesis of 1,2-Diketones and Consecutive One-Pot Generation of Quinoxalines
Niesobski, Patrik,Martínez, Ivette Santana,Kustosz, Sebastian,Müller, Thomas J. J.
supporting information, p. 5214 - 5218 (2019/07/31)
We report a simple and efficient one-pot synthesis of 1,2-diketones by concatenation of two Pd/Cu-catalyzed processes: Pd0/CuI-catalyzed Sonogashira coupling of terminal alkynes with aryl (pseudo)halides furnishes internal alkynes, which are directly transformed by PdII/CuII-catalyzed Wacker-type oxidation with DMSO and oxygen as dual oxidants to furnish 1,2-diketones. With this efficient, catalyst economical process, various aryl iodides and triflates are efficiently transformed in high yields into symmetrically and unsymmetrically substituted 1,2-diketones with various functional groups. This process can be readily extended to a consecutive one-pot synthesis of quinoxalines in a diversity-oriented fashion.
CARRIER GENERATION MATERIAL AND ORGANIC LIGHT-EMITTING DIODE
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Paragraph 0036, (2017/03/31)
A carrier generation material is provided, which has a chemical structure of: wherein R1 is hydrogen or alkyl group; each of R2 is independently hydrogen, halogen, —CN, —CF3, —NO2, or alkyl group; each of R3 is independently hydrogen, halogen, —CN, —CF3, —NO2, or alkyl group; R4 is hydrogen, halogen, —CN, —CF3, —NO2, or alkyl group; R5 is hydrogen, halogen, —CN, —CF3, —NO2, or alkyl group; R6 is ═O, ═NH, or malononitrile group, and R7 is hydrogen, halogen, —CN, —CF3, —NO2, or alkyl group.
Carrier generation material and organic light emitting diode
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Paragraph 0061; 0062; 0063, (2017/08/28)
The invention provides a carrier generation material, the chemical structure is as shown in the specification, R1 is hydrogen or alkyl; R2 independently is hydrogen, halogen,-CN,-CF3,-NO2, or alkyl; R3 independently is hydrogen, halogen,-CN,-CF3,-NO2 or alkyl; R4 is hydrogen, halogen,-CN,-CF3,-NO2, or alkyl; R5 is hydrogen, halogen,-CN,-CF3,-NO2, or alkyl; R6 is =O, =NH, or malononitrile group; and R7 is hydrogen, halogen,-CN,-CF3,-NO2, or alkyl.
Understanding the colorimetric properties of quinoxaline-based pi-conjugated copolymers by tuning their acceptor strength: A joint theoretical and experimental approach
Fagour, Sébastien,Thirion, Damien,Vacher, Antoine,Sallenave, Xavier,Sini, Gjergji,Aubert, Pierre-Henri,Vidal, Frédéric,Chevrot, Claude
, p. 22311 - 22319 (2017/07/10)
A series of five new π-conjugated donor-acceptor-donor (DADn) copolymers are presented, combining a common donating unit (substituted propylenedioxythiophene, ProDOT-(OEtHx)) with five diphenyl-quinoxaline based acceptor units bearing substituents of increasing acceptor strength (OMe n copolymers, namely P3-X (X = OMe, H, F, COOMe, CN), have been studied in solid state by cyclic voltammetry to investigate their electronic properties during n- and p-doping processes and to determine their electrochemical band gap. UV-Vis spectroscopy reveals a dual-band absorption system in which both high energy and low energy band (HEB and LEB) positions and intensities are governed by the acceptor strength. Density functional theory (DFT) computations were performed on D-A-D trimer model compounds in order to understand the experimental results. A colorimetric study in the CIELAB color space revealed that the modulation of the acceptor strength with σ- or π-electron withdrawing/donating groups leads to shades of blue to green upon increasing the acceptor strength. The polymers can also switch to a grey color upon p-doping. Finally, a detailed discussion on color-structure relationship provides valuable insights on molecular design principles to render cyan and green colors.
Unexpected transformation of aldehydes into benzoins with Copper(I)/Samarium
Liu, Yongjun,Wang, Hui,Fu, Yulong,Qi, Yan,Yang, Kuiwei
, p. 259 - 266 (2013/12/04)
The reductive coupling of aldehydes to afford pinacolic alcohols using all kinds of reducing agents involving samarium is well known. In this report, however, treatment of aromatic aldehydes with Cu(I)/Sm system produces benoins and/or benzils in good yields. A possible mechanism is proposed where Cu(I) not only activates the Sm metal but also promotes the dehydrogenation of the intermediates, during which a Cu(III) species may be involved. [Supplementary materials are available for this article. Go to the publisher's online edition of Synthetic Communications for the following free supplemental resource(s): Full experimental and spectral details.]
TRANSITION-METAL CHARGE-TRANSPORT MATERIALS, METHODS OF FABRICATION THEREOF, AND METHODS OF USE THEREOF
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Page/Page column 47; Sheet 22, (2010/02/15)
Briefly described, embodiments of this disclosure include transition-metal charge-transport materials, methods of forming transition-metal charge-transport materials, and methods of using the transition-metal charge-transport materials.
Cobalt catalysed synthesis of 1,2-diones from aromatic aldehydes in the presence of n-butanal
Punniyamurthy,Kalra, Swinder Jeet Singh,Iqbal, Javed
, p. 2959 - 2960 (2007/10/02)
Cobalt(II) chloride catalyses the oxidative coupling of a wide range of aromatic aldehydes in the presence of dioxygen to afford 1,2-diones or carboxylic acids. Aromatic aldehydes may be transformed to 1,2-diones in the presence of n-butanal whereas the presence of acetic anhydride and n-butanal lead to the formation of the corresponding carboxylic acids.
