2050-48-8Relevant articles and documents
Poly(spirobifluorene)s containing nonconjugated diphenylsulfone moiety: Toward blue emission through a weak charge transfer effect
Wang, Xuchao,Zhao, Lei,Shao, Shiyang,Ding, Junqiao,Wang, Lixiang,Jing, Xiabin,Wang, Fosong
, p. 2907 - 2914 (2014)
Instead of conjugated dibenzothiophene-S,S-dioxide (DBTSO), we have introduced nonconjugated diphenylsulfone (DPSO) as the electron-deficient unit into the main chain of poly(spirobifluorene)s (PSFs). Because of the weaker electron affinity of DPSO relative to DBTSO, the charge transfer from the pendant 2,3,6,7-tetraoctyloxyfluorene to the main chain can be effectively prevented. Consequently, the resultant polymers containing DPSO moiety show pure blue emissions, which is different from DBTSO-based PSFs that exhibit undesired green emissions. With a single-layer device configuration, a peak luminous efficiency of 2.90 cd/A and a maximum luminescence of 14130 cd/m2 have been realized for the polymer PSFDPSO03. The corresponding CIE coordinates are (0.17, 0.18), nearly independent of the applied current density from 2 to 592 mA/cm2. These results indicate that tuning the electron affinity of the incorporated electron-deficient units is a very promising strategy to control the charge transfer strength for the development of blue-emitting PSFs with high efficiency and stability.
D–π–A polysulfones for blue electroluminescence
Geng, ZhongMin,Sato, Go,Marumoto, Kazuhiro,Kijima, Masashi
, p. 3454 - 3461 (2016)
Donor–π–acceptor type fluorene-based copolymers with a sulfone unit were designed and synthesized for application in efficient pure-blue light emitting. The electroluminescence behaviors of these copolymers were investigated by fabricating light-emitting diodes and electrochemical cell devices. The former device little functioned but the latter worked well. The electrochemical cell devices having a configuration of ITO/PEDOT:PSS/copolymer:ionic liquid/Al exhibited purplish blue electroluminescence with an emission maximum at 434 nm (CIE coordinates (x, y) = (0.17, 0.10)) measured at 7 V. The initial positive scan of the D–π–A polysulfone based light emitting electrochemical cell with a sweep rate of 0.1 V s?1 afforded a maximum luminance of 1080 cd m?2 with a current efficiency of 1.96 cd A?1 at an operating voltage of 12.5 V.
Electrochemical oxygenation of sulfides with molecular oxygen or water: Switchable preparation of sulfoxides and sulfones
Li, Jin-Heng,Li, Yang,Sun, Qing,Xue, Qi,Zhang, Ting-Ting
supporting information, p. 10314 - 10318 (2021/12/17)
A practical and eco-friendly method for the controllable aerobic oxygenation of sulfides by electrochemical catalysis was developed. The switchable preparation of sulfoxides and sulfones was effectively controlled by reaction time, in which both molecular oxygen and water can be used as the oxygen source under catalyst and external oxidant-free conditions. The electrochemical protocol features a broad substrate scope and excellent site selectivity and is successfully applied to the modification of some sulfide-containing pharmaceuticals and their derivatives. This journal is
Bipolar fluorophores based on intramolecular charge-transfer moieties of sulfone for nondoped deep blue solution-processed organic light-emitting diodes
Cao, Liang,Zhang, Lei,Wei, Qiang,Zhang, Jiasen,Chen, Dongjun,Wang, Sheng,Su, Shi-jian,Wang, Tao,Ge, Ziyi
, (2020/02/11)
Dipolar emitters exhibited excellent performance in organic light-emitting diode (OLED). However, these molecules had intramolecular charge-transfer (ICT) properties, which posed challenge to obtain deep blue emission. In this study, three fluorophores were designed by introducing carbazole and diphenylamine as electron donors and sulfone as electron acceptor due to their mild charge-accepting properties and twisted angles. These materials appeared almost in vertical angles of the dihedral configuration, and exhibited high thermal and electrochemical stability, suitable for solution-processed OLED. The solution-processed non-doped devices based on these three emitters were realized, where two emissions within the standard deep blue emission range were achieved with the Commission International e de l'Eclairage (CIE) coordinates of (0.16, 0.12) and (0.16, 0.15).
Synthesis and photophysical properties of fluorescent dyes based on triphenylamine, diphenylamine, diphenyl sulfone or triphenyltriazine derivatives containing an acetylene linkage group
Ahn, Sung-Ok,Choi, Jae-Hong,Kim, Kyung-Won,Kwon, Su-Hyeon,Lee, Byung-Jun,Lee, Ju-Hong
, (2020/06/22)
In this study, ten fluorescent dyes were prepared based on three different kinds of central moiety, such as triphenylamine, diphenylsulfone or triphenyltriazine, which was coupled to either carbazole or naphthalimidinyl group via an acetylene linkage group. N-n-Butyl-carbazole, N-phenyl-carbazole or N-n-butyl-naphthalimide was coupled to the individual central moiety of triphenylamine, diphenyl sulfone, 2,4,6-triphenyl-1,3,5-trazine or diphenylamine using a Sonogashira coupling reaction in the final step. All dyes were confirmed their chemical structure by 1H NMR, GC-Mass and elemental analyses. The absorption properties and thermal stabilities of the fluorescent dyes were examined. Density Functional Theory (DFT) and Time-Dependent DFT calculations were carried out, in addition to geometry simulation, by using the Gaussian 09 program. In terms of fluorescence properties in this series, two dyes based on diphenyl sulfonyl and three dyes based on triphenylamine substituted by 1–3 of N-n-butyl-carbazole exhibited a blue emission, whereas three dyes based on triphenylamine substituted by 1–3 of N-n-butyl-naphthalimide were observed by a red emitter which can be attributable to both effects the bathochromic shifts in absorption maxima and larger Stokes shifts. In case of corresponding 2,4,6-triphenyl-1,3,5-trazine central moiety coupled to a carbazole ring, a green fluorescence was emitted. Results revealed that the fluorescence of the dyes is affected by the electron-donating strength of the acetylene linkages involved in the π-conjugation systems of the dyes.
Facile synthesis of diarylsulfones from arenes and 3CdSO4·xH2O via mechanochemistry
Qin, Shuai,Zhang, Pu,Qin, Yu-Jun,Guo, Zhi-Xin
supporting information, (2020/01/06)
A variety of substituted diarylsulfones could be synthesized by simple arenes and 3CdSO4·xH2O in the presence of P2O5 under high-speed ball milling. It was suggest the aromatic sulfonation was performed by arene and in situ generated H2SO4, following-up by electrophilic substitution with another arene to give diarylsulfone.
Symmetrical sulfur-containing wet processing type blue organic electroluminescent material as well as preparation method and application thereof
-
, (2019/10/01)
The invention provides a series of sulfone-containing symmetrical wet process type blue organic electroluminescent materials, which contain sulfones, substituted carbazoles, fluorenes, triphenylamines and derivatives thereof. By a symmetrical design, the electron transmission balance is adjusted; the solubility of molecules is increased by increasing a branched chain of an alkyl chain, wet processing is facilitated and the production cost is reduced. The series of electroluminescent materials relate to the field of electroluminescence, can emit blue and dark blue fluorescence, and can be applied to the fields of OLED (Organic Light Emitting Diode) lighting and OLED display. The material has a strong electron acceptor and a weaker electron donor, a large conjugated structure and a twisted and partially rigid planar structure, the intermolecular force is suppressed, the stability of a device is improved, and high level fluorescence quantum efficiency and blue light material are obtained.
Synthesis and nano-Pd catalyzed chemoselective oxidation of symmetrical and unsymmetrical sulfides
Li, Xing,Du, Jia,Zhang, Yongli,Chang, Honghong,Gao, Wenchao,Wei, Wenlong
, p. 3048 - 3055 (2019/03/21)
A highly chemoselective, efficient and nano-Pd catalyzed protocol for the rapid construction of sulfoxides and sulfones via the oxidation of symmetrical and unsymmetrical sulfides using H2O2 as an oxidant has been developed, respectively. The ready availability of starting materials, easy recovery and reutilization of the catalyst, wide substrate scope, and high yields make this protocol an attractive alternative. The process also involves the metal-free and microwave-promoted synthesis of symmetrical diarylsulfides, and FeCl3-mediated preparation of symmetrical diaryldisulfides through the reaction of arenediazonium tetrafluoroborates with Na2S·9H2O as a sulfur source. In addition, unsymmetrical sulfides were generated via the K2CO3-mediated reaction of arenediazonium tetrafluoroborates with symmetrical disulfides.
Method for photocatalytic synthesis of sulfur sulfone compounds
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Paragraph 0054-0055, (2019/05/15)
The invention discloses a method for photocatalytic synthesis of sulfur sulfone compounds, and belongs to the technical field of catalysis. The invention provides a novel green environmentally-friendly method to efficiently synthesize the sulfur sulfone derivatives, and one thioether compound and an oxidizing agent are subjected to direct oxidization to form one corresponding sulfur sulfone compound under illumination by utilizing cercosporin as a catalyst. The method provided by the invention adopts the cercosporin as the catalyst, the catalytic conditions are milder, the reaction can be performed at room temperature under visible light irradiation, the catalyst has high catalytic activity and can be used for high-selectivity catalytic synthesis of the sulfur sulfone compounds, and the micro catalyst can make a yield higher, wherein the yield can reach 90% or more; and the photocatalyst and substrate raw materials used in the method are simple and easy to obtain, have low costs and can be produced on a large scale, and the method has very good application prospects.
Switchable Synthesis of Aryl Sulfones and Sulfoxides through Solvent-Promoted Oxidation of Sulfides with O2/Air
Cheng, Zhen,Sun, Pengchao,Tang, Ailing,Jin, Weiwei,Liu, Chenjiang
supporting information, p. 8925 - 8929 (2019/11/14)
A practical and switchable method for the synthesis of aryl sulfones and sulfoxides via sulfide oxidation was developed. The chemoselectivities of products were simply controlled by reaction temperature using O2/air as the terminal oxidant and oxygen source. The broad substrate scope, easy realization of gram-scale production, and the simplification of a sulfide oxidation system render the strategy attractive and valuable.
