151600-02-1Relevant articles and documents
New Fluorescent Conjugates Displaying Solvatochromic Properties
Liu, Huijing,Huang, Rongrong,Fang, Yu
, p. 707 - 715 (2017)
Four new fluorescent dyes based on bis(phenyl-ethynyl-)-2-naphthyl (BPEN) were designed and synthesized. To improve the solvatochromic property and enhance the brightness of the fluorescent BPEN, an electron-donating unit of azetidine and/or an electron deficient group of -NO2 was introduced. The corresponding fluorophores are denoted as T1, T2, T3 and T4, respectively. Moreover, to facilitate derivatization of the probes, two ethoxy carbonyl residues were grafted onto the side positions of BPEN. Spectroscopic studies demonstrated that introduction of azetidine leads to superior solvatochromic properties and largely enhanced fluorescence quantum yields as evidenced by the fact that T3 shows more than 150 nm shift in its maximum emission when dissolved in solvents of very different polarities and displays high fluorescence quantum yields in the solvents studied. However, T2, which is the one bearing a -NO2 group, is non-fluorescent. Theoretical analysis and Lippert-Mataga modeling revealed the intra-molecular charge transfer (ICT) nature of the solvatochromic behavior of the compounds. Further test reveals that the fluorophores, in particular T3, are sensitive to the presence of trace water in less polar solvents, such as THF and 1,4-dioxane. Moreover, it is believed that the new fluorophores may serve as building blocks for creating environment-sensitive fluorescent sensors.
An electroluminescen compound and an electroluminescent device comprising the same
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Paragraph 0444; 0457-0460, (2021/07/13)
The present invention relates to an organic light-emitting compound represented by chemical formula 1. An organic electroluminescent device comprising the organic light-emitting compound in the present invention has excellent power efficiency, light-emitting efficiency, and long life cycle because the present invention can be operated by a lower driving-voltage in comparison to a device comprising conventional phosphorescent host materials. [Chemical formula 1].
Ligand- and Solvent-Tuned Chemoselective Carbonylation of Bromoaryl Triflates
Shen, Chaoren,Wei, Zhihong,Jiao, Haijun,Wu, Xiao-Feng
supporting information, p. 13369 - 1337 (2017/09/06)
The palladium-catalyzed chemoselective carbonylation of bromoaryl triflates is reported. The selective C?Br bond versus C?OTf (OTf=triflate) bond functionalization can be remarkably tuned by the combination of the ligand [4,5-bis(diphenylphosphino)-9,9-dimethylxanthene (Xantphos) vs. 1,1′-bis(diphenylphosphino)ferrocene (DPPF)] and the solvent (toluene vs. DMSO). The respective ligand and solvent effects are rationalized by DFT calculations. In contrast, the monodentate ligands BuPAd2 and tBu3P prefer the selective C?Br bond activation and are solvent insensitive.
