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.
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
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.
Symmetrical sulfur-containing wet processing type blue organic electroluminescent material as well as preparation method and application thereof
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, (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.